Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at s √ = 13 TeV
EEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN)
CERN-EP-2019-2802020/05/19
CMS-EXO-18-013
Search for an excited lepton that decays via a contactinteraction to a lepton and two jets in proton-protoncollisions at √ s =
13 TeV
The CMS Collaboration ∗ Abstract
Results are presented from a search for events containing an excited lepton (electronor muon) produced in association with an ordinary lepton of the same flavor anddecaying to a lepton and two hadronic jets. Both the production and the decay ofthe excited leptons are assumed to occur via a contact interaction with a characteristicenergy scale Λ . The branching fraction for the decay mode under study increases withthe mass of the excited lepton and is the most sensitive channel for very heavy excitedleptons. The analysis uses a sample of proton-proton collisions collected by the CMSexperiment at the LHC at √ s =
13 TeV, corresponding to an integrated luminosityof 77.4 fb − . The four-body invariant mass of the two lepton plus two jet system isused as the primary discriminating variable. No significant excess of events beyondthe expectation for standard model processes is observed. Assuming that Λ is equalto the mass of the excited leptons, excited electrons and muons with masses below5.6 and 5.7 TeV, respectively, are excluded at 95% confidence level. These are the bestlimits to date. ”Published in the Journal of High Energy Physics as doi:10.1007/JHEP05(2020)052 .” c (cid:13) ∗ See Appendix A for the list of collaboration members a r X i v : . [ h e p - e x ] M a y The standard model (SM) of particle physics accurately describes a broad range of observa-tions, but it does not provide an explanation for many of its own features. Among the mostprominent of these features is the existence of three fermion generations, encompassing bothleptons and quarks. Attempts to explain the observed generation structure have led to a classof models postulating that quarks and leptons are composite objects that consist of more fun-damental constituents [1–9]. In these models, the fundamental constituents are bound by anasymptotically free gauge interaction that becomes strong below a characteristic scale Λ . Suchcompositeness models predict the existence of excited states of quarks (q ∗ ) and leptons ( (cid:96) ∗ ) atthe characteristic scale of the new binding interaction. Since these excited fermions couple toordinary SM fermions, they could be produced via contact interactions (CI) in collider exper-iments, with subsequent decays to SM fermions through the gauge interactions (GIs), via theemission of a W or Z boson or a photon ( γ ), or via a CI to other fermions. q ll ∗ lqq q Λ Λ
Figure 1: Feynman diagram for the production of an excited lepton in association with an SMlepton in a hadron collider. The excited lepton decays via a contact interaction to one SM leptonand two resolved jets, which result from the hadronization of the quarks.Searches at the CERN LEP [10–13], DESY HERA [14], and the Fermilab Tevatron [15–18] havefound no evidence for excited leptons. At the CERN Large Hadron Collider (LHC), previoussearches performed by the ATLAS [19–21] and CMS collaborations [22, 23] have also found noevidence of excited leptons. The maximum Λ value excluded experimentally corresponds to25 TeV (for M (cid:96) ∗ ≈ (cid:96)(cid:96) γ analysis using proton-proton (pp) collisiondata at √ s =
13 TeV, corresponding to an integrated luminosity of 35.9 fb − [24]. The sameanalysis excluded excited electrons and muons with masses below 3.7 and 3.8 TeV, respectively,for M (cid:96) ∗ = Λ .In this paper, a search for excited leptons (e ∗ and µ ∗ ) is presented. This analysis focuses on theproduction of two same-flavor leptons of which one is excited and the other one correspondsto an SM lepton. The excited lepton is assumed to decay subsequently via a CI to an SM leptonof the same flavor and a quark pair, yielding two jets. The process is illustrated in Fig. 1.The data used for this analysis were recorded with the CMS detector in pp collisions at √ s =
13 TeV during 2016 and 2017 and correspond to integrated luminosities of 35.9 and 41.5 fb − ,respectively, for a total of 77.4 fb − . The central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diame-ter, providing a magnetic field of 3.8 T. Within the solenoid volume are a silicon pixel and strip tracker, a lead tungstate crystal electromagnetic calorimeter (ECAL), and a brass and scintilla-tor hadron calorimeter (HCAL), each composed of a barrel and two endcap sections. Extensiveforward calorimetry complements the coverage provided by the barrel and endcap detectors.The silicon tracker measures charged particles within the pseudorapidity range | η | < | η | < < | η | < p T ≈
45 GeV from Z → ee decays is better than 2%in the central region of the ECAL barrel ( | η | < ) , and is between 2 and 5% elsewhere [25].For high energies, which are relevant for this analysis, the electron energy resolution slightlyimproves [26].Muons are measured in gas-ionization detectors embedded in the steel flux-return yoke out-side the solenoid, in the pseudorapidity range | η | < | η | ≤ < | η | < p T up to 100 GeV, of 1% in the barrel and3% in the endcaps. The p T resolution in the barrel is better than 7% for muons with p T up to1 TeV [27].A particle-flow algorithm [28] aims to reconstruct and identify each individual particle in anevent, with an optimized combination of information from the various elements of the CMSdetector. The energy of photons is obtained from the ECAL measurement. The energy of elec-trons is determined from a combination of the electron momentum at the primary interactionvertex as determined by the tracker, the energy of the corresponding ECAL cluster, and theenergy sum of all bremsstrahlung photons spatially compatible with originating from the elec-tron track. The muon p T is obtained from the curvature of the corresponding track. The energyof charged hadrons is determined from a combination of their momentum measured in thetracker and the matching ECAL and HCAL energy deposits, corrected for zero-suppression ef-fects and for the response function of the calorimeters to hadronic showers. Finally, the energyof neutral hadrons is obtained from the corresponding corrected ECAL and HCAL energies.The CMS experiment has a two-level trigger system [29]. The level-1 trigger, composed ofcustom hardware processors, selects events of interest using information from the calorimetersand muon detectors and reduces the readout rate from the 40 MHz bunch-crossing frequency toa maximum of 100 kHz. The software based high-level trigger uses the full event information,including that from the inner tracker, to reduce the event rate to the 1 kHz that is recorded.A more detailed description of the CMS detector can be found in Ref. [30]. Excited leptons can be produced at a pp collider by a CI that is described by an effective four-fermion Lagrangian L CI = g ∗ Λ j µ j µ , (1) Λ * / l M 𝔅 W ν→ l* γ l → l* lZ → l* (CI)qlq → l* lll (CI) → l* (CI) νν l → l* f = f' = 1.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Λ * / l M 𝔅 W ν→ l* γ l → l* lZ → l* (CI)qlq → l* lll (CI) → l* (CI) νν l → l* f = f' = 0.1 Figure 2: Branching fractions, B , of excited lepton decay channels as a function of the ratioof the excited lepton mass ( M (cid:96) ∗ ) and compositeness scale ( Λ ) for fixed values of the modelparameters f = f (cid:48) , which represent the couplings of excited leptons to SM particles. Thebranching fraction calculation is based on Ref. [6]. The contact interaction decay to one leptonand two jets, subject of this analysis, is dominating the region of high M (cid:96) ∗ / Λ . Couplings f and f (cid:48) are assumed to be equal to 1 in the left graph, and 0.1 in the right graph.with the coupling g ∗ chosen to correspond to 4 π , fermion current j µ = ψγ µ ψ , and Λ repre-senting the compositeness scale [6]. The excited lepton, (cid:96) ∗ , can decay to an SM lepton via aCI (cid:96) ∗ → (cid:96) ψψ , where ψ is a fermion, or through the mediation of a gauge boson. This analysiscomplements other searches for excited leptons in the (cid:96)(cid:96) γ or (cid:96)(cid:96) Z channels and is most sensitiveat large values of M (cid:96) ∗ and/or Λ . Figure 2 illustrates the rapid increase of the branching fractionof the CI decay to a lepton plus two jets as a function of M (cid:96) ∗ / Λ .The GI transition of excited leptons to SM leptons is described by L GI = Λ ψ (cid:63) R σ µν (cid:18) g f τ W µν + g (cid:48) f (cid:48) Y B µν (cid:19) ψ L + h.c., (2)where g and g (cid:48) denote the couplings to the hypercharge and the weak isospin current and f and f (cid:48) effectively scale the energy scale of the interaction Λ with respect to the CI [6]. Otherquantities are W µν and B µν denoting the field strength tensors of the SU ( ) and U ( ) gaugefields with their generators τ and Y . The partial width of the CI decay is independent of f and f (cid:48) . Interference between GI and CI transitions is not considered [6]. Since the exactvalues for f and f (cid:48) are not known, searches for excited leptons are typically interpreted fortwo extreme values: f = f (cid:48) = f = − f (cid:48) =
1. Gauge-interaction decays via photonemission are forbidden for f = − f (cid:48) . Figure 2 shows the variation of the branching fractions ofthe different decay channels as a function of M (cid:96) ∗ / Λ , illustrated in Fig. 2 (left) for couplings of1.0. Couplings below unity are also possible and can have a significant impact on the branchingfractions, as seen in Fig. 2 (right) for couplings of 0.1. Weaker couplings reduce widths for thegauge-interaction decays while enhancing the CI decays. A range of couplings is included inthe interpretation of the experimental results.The production and decay of excited leptons are simulated at leading-order precision with PYTHIA (cid:96) ∗ masses of 200, 500, 750 and 1000 GeV and from 1 to 7 TeV in steps of 0.5 TeV. In the simulation, all couplings are set to unity and Λ to 10 TeV. The specific choice of Λ in the simulation scales the overall cross section for theprocess, while leaving the kinematic variables unaffected. Hence, the simulated events canbe reweighted in order to represent different choices of the couplings and Λ . While the reso-nance width depends on Λ , it is smaller than the detector resolution for all values used in thisanalysis. For the example of a 5 TeV signal, the width is of order 15% of the resolution.At Λ =
10 TeV and f = M (cid:96) ∗ =
200 GeV), 1.115 fb ( M (cid:96) ∗ = × − fb ( M (cid:96) ∗ = × − fb ( M (cid:96) ∗ = (cid:96) ∗ signal, each of the decay productswill have a p T of approximately 1 TeV, and will tend to be in the central part of the detector. The candidate vertex with the largest value of summed physics-object p is taken to be theprimary pp interaction vertex. Here the physics objects are the jets, clustered using the jetfinding algorithm [35, 36] with the tracks assigned to the candidate vertices as inputs, and theassociated missing transverse momentum, taken as the negative vector p T sum of these jets.In order to suppress background from cosmic ray muons, an event must have at least oneprimary vertex, with at least five associated well-reconstructed tracks that are within 24 cm inthe longitudinal and 2 cm in the transverse direction from the nominal interaction point.Electrons are reconstructed as ECAL clusters that are matched to a central track and their iden-tification has been optimized for high- p T values [37]. In order to differentiate between electronsand photons, the properties of the track matched to the calorimeter measurement must be con-sistent with those of an electron originating from the primary vertex. Specifically, there mustbe ≤ | η | < < | η | < p T of all tracker and calorimeter objects in a cone of radius ∆ R = √ ( ∆ φ ) + ( ∆ η ) < φ is azimuthal angle in radians, must be less than 3% ofthe electron p T . Only well-measured tracks that are consistent with originating from the samevertex as the electron are included in the isolation cone.The muon system covers the pseudorapidity region | η | < p T values [37]. Measurements from the inner tracker and the outer muonsystem are combined. The tracker track must have a transverse impact parameter d xy < p T , an additional requirement σ p T / p T < σ p T is the p T uncertainty from the muon track reconstruction. Muon isolationrequires that the scalar p T sum of all tracks originating from the interaction vertex within a ∆ R < p T .This analysis uses η - and p T -dependent scale factors to correct the simulated event yields for themeasured differences in the trigger, reconstruction, and identification efficiencies as comparedwith data.For each event, hadronic jets are clustered from the reconstructed particle-flow objects with theinfrared and collinear safe anti- k T jet clustering algorithm [35, 36] using a distance parameterof R = p T spectrum and detector acceptance. Additional proton-proton interactions withinthe same or nearby bunch crossings can contribute additional tracks and calorimetric energydepositions, increasing the apparent jet momentum. To mitigate this effect, tracks identifiedas originating from pileup vertices (contributions from additional pp interactions in the sameor nearby bunch crossings) are discarded. Jet energy corrections are derived from simulationstudies so that the average measured response of jets becomes identical to that of particle leveljets. In situ measurements of the momentum balance in dijet, photon+jet, Z+jet, and multijetevents are used to determine any residual differences between the jet energy scale in data andin simulation, and appropriate corrections are made [39]. Additional selection criteria are ap-plied to each jet to remove jets potentially dominated by instrumental effects or reconstructionfailures. Because the final state contains two opposite-sign leptons, the main background originatesfrom Drell–Yan (DY) production. These events are simulated using the NLO generator M AD -G RAPH MC @ NLO v2.2.2 [40, 41] with up to two final-state partons, and are hadronized with
PYTHIA
POWHEG
PYTHIA t -channel production are simulated with POWHEG . Thesingle top s -channel is simulated with M AD G RAPH MC @ NLO .Several multi-boson processes can also yield at least two leptons. However, because they havesmall cross sections, they are sub-dominant backgrounds in this search. The WW, WZ, and ZZprocesses with at least two leptons are simulated with
POWHEG and M AD G RAPH MC @ NLO .Triple-boson processes are neglected because of their small cross sections.The W+jets production can contribute to the signal region when jets are misidentified as elec-trons. In contrast, the misidentification of muons is negligible. The W+jets production is sim- ulated to leading order with M AD G RAPH MC @ NLO v2.2.2 [40, 41]. In addition, high- H T Wsamples are also used, where H T is defined as the sum of jet transverse momenta. The W+jetscross section is normalized to NNLO by application of a K-factor of 1.21 [42].The background samples are simulated using the NNPDF2.3 or NNPDF3.0 [49] PDF sets withtune CUETP8M1 (in 2016) and the NNPDF3.1 (in 2017) PDF set with CP5 (2017) for the un-derlying event, respectively [34]. All generated events are processed through a full simulationof the CMS detector based on G EANT
Events with electrons in the final state were selected using a trigger that requires an electro-magnetic cluster (electron or photon) with transverse momenta larger than 175 GeV (for 2016)and 200 GeV (for 2017). Events with muons in the final state were triggered with the single-muon trigger with a minimum p T of 50 GeV. The electron (muon) efficiency plateaus at 98.5%(98%) [51] as a function of p T above a turn-on region and is independent of η , φ , and pileup. M ll (GeV) V R - l o w m a ss ( D Y d o m i n a t e d ) V R - m e d i u m m a ss ( tt - d o m i n a t e d ) SRT - high mass
Figure 3: Definition of the two validation regions (VR) and the high-mass signal region (SRT).Final state particles (electrons, muons and jets) are reconstructed as described in Section 4. Thetwo highest p T (leading) leptons are selected along with the two leading jets. The p T thresh-olds for the leading lepton are 230 GeV (electron) and 53 GeV (muon), chosen to be above therespective trigger turn-on regions. The subleading electrons or muons are required to have anoffline p T of at least 35 and 25 GeV, respectively. Jets are required to have a minimum p T of50 GeV. Events with more than two same-flavor leptons are rejected, to reduce backgroundfrom diboson production.The majority of the DY background is suppressed by requiring M (cid:96)(cid:96) >
500 GeV, constitut-ing the high-mass signal region (SRT) . Two VRs are then defined, illustrated in Fig. 3, to ver-ify agreement between data and simulation in different mass regions. The low-mass VR with M (cid:96)(cid:96) <
200 GeV serves as the VR for DY, which is the dominant background for this final state.The subleading tt background tends to populate the medium-mass VR , which is defined by200 GeV < M (cid:96)(cid:96) <
500 GeV. While the low-mass VR is nearly signal free, the medium-massVR potentially contains a very small fraction of signal events. The signal contamination in themedium VR is far below 1% for the interesting mass range of M (cid:96) ∗ above 3.8 TeV.The invariant mass of the combination of both selected leptons and the two leading jets, M (cid:96)(cid:96) jj , is used as the discriminating variable as it provides the best separation power between signal andbackground. The distributions of other possible variables were studied, but their use yieldedlower signal significance. The event distributions as functions of the four-body mass for thelow-mass and medium-mass validation regions are shown in Figs. 4 and 5, respectively. Thegood agreement between experimental and simulated data justifies estimating the backgroundexpectation from simulation. − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4low mass VRelectron channel DataDYttMultibosonSingle tW+jetssyst. + stat. uncert. [TeV] eejj M D a t a / M C − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4low mass VRmuon channel DataDYttMultibosonSingle tW+jetssyst. + stat. uncert. [TeV] jj µµ M D a t a / M C Figure 4: Event distributions as a function of the four-body invariant M (cid:96)(cid:96) jj mass for the electron(left) and muon (right) channels, for the low-mass validation region defined by M (cid:96)(cid:96) <
200 GeV.The lower panels show the ratio of data to the simulated SM background, with the shaded bandrepresenting the uncertainty.The signal efficiency, defined as the product of acceptance and detection efficiency of the frac-tion of reconstructed 2 (cid:96)
2j events, resulting from these event selections is shown as a functionof the simulated excited lepton mass in Fig. 6. The uncertainties in the figure are only statisti-cal uncertainties. The systematic uncertainties on the product of acceptance and efficiency arebetween 6 and 8%. The efficiency reaches a plateau of about 55% for the electron channel and73% for the muon channel. For lower masses, in particular for M (cid:96) ∗ < p T thresholds on the objects but this mass region is not of primaryinterest given previous exclusion limits. For masses above 6 TeV, the efficiency starts to dropslightly because of a growing fraction of events produced off-shell. At the given center-of-massenergy of the LHC, the available energy for generating such heavy particles is limited. Systematic uncertainties in this analysis can affect the overall normalization and also the shapeof the distributions. Uncertainties in the energy scale of different physics objects are takeninto account by analyzing the shape of the four-body mass distributions, with the energy scaleshifted up and down by 1 σ . The electron energy scale uncertainty is estimated to be 0.2% in thebarrel and 0.3% in the endcap [52]. For muons, the momentum scale is determined using thegeneralized endpoint method [27] and applied as a function of the η and φ of the muon. Thestudies indicate the absence of a significant curvature bias, within an uncertainty of 0.02/TeVin the central region and up to 0.1/TeV in the more forward regions. For jets, the uncertaintiesassociated with the jet energy correction are used [39]. − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4medium mass VRelectron channel DatattDYSingle tMultibosonW+jetssyst. + stat. uncert. [TeV] eejj M D a t a / M C − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4medium mass VRmuon channel DatattDYSingle tMultibosonW+jetssyst. + stat. uncert. [TeV] jj µµ M D a t a / M C Figure 5: Event distribution as a function of the four-body invariant mass M (cid:96)(cid:96) jj for the electron(left) and muon (right) channels, for the medium-mass validation region defined by 200 < M (cid:96)(cid:96) <
500 GeV. The lower panel shows the ratio of data to the simulated SM background, withthe shaded band representing the uncertainty.The simulated energy resolution is better than that measured in data. To account for this, jetenergy resolution corrections are applied to jets and their uncertainties are considered as asystematic effect [39]. For electrons, the momentum is smeared by 1.2 and 2.4% for barrel andendcaps, respectively [52]. For muons, the momentum is smeared by 5% [27]. These threeuncertainties change the shape of the background.There are systematic uncertainties on the scale factors applied to correct for the differencesin the triggering, reconstruction and identification efficiencies between simulation and data.These uncertainties are typically a few percent and are taken into account as normalization un-certainty [27, 52]. The integrated luminosity of the data collected has an uncertainty of 2.5 [53]and 2.3% [54] for the 2016 and 2017 data sets, respectively. The uncertainty due to the model-ing of pileup is found to be less than 10% and is by derived by calculating the pileup for thecases where the total inelastic cross section is increased and decreased by 5% from the nominalvalue [55]. It is treated as an uncertainty in the background shape.The uncertainty associated with the choice of PDFs affects the cross section of the simulatedsamples and is taken into account by following an approach outlined by the PDF4LHC recipe [56].The PDF set used to calculate the variations is NNPDF3.0, for background and signal samplesin 2016, and NNPDF3.1, in 2017. Overall, the variation is found to range from 5% to 60% for anexcited lepton mass from 1 TeV to 6 TeV, respectively, as taken from LHAPDF6.2 [57].The renormalization and factorization scales provide a handle to estimate the uncertainty dueto missing higher orders. Both scales are varied simultaneously by a factor 2 up and down,resulting in different event-by-event weights and an uncertainty of 10 to 30% between 1 and6 TeV.In the signal region, the limited number of simulated background events results in a statisticaluncertainty of up to 40% in the background prediction.Production of W+jets final states can contribute to the background when a jet is misidentified asa lepton, albeit at a very small level. A conservative systematic uncertainty of 100% is applied to * [TeV] l M S i gna l E ff i c i en cy Electron ChannelMuon Channel
CMS (13 TeV) -1 fb77.4 Figure 6: Signal efficiency after all selections are applied, as a function of the excited leptonmass M (cid:96) ∗ , based on simulated events.the W+jets background contribution and reflects the uncertainty in the lepton misidentificationrate in the simulation as compared with data.For the SM background, the dominant sources of uncertainties are the Monte–Carlo (MC) sam-ple sizes and the PDF uncertainty. Event distributions for the signal regions as a function of the four-body invariant mass areshown for the electron and muon channels in Fig. 7. The final distribution is dominated bytt background in the low-mass region and DY background in the high mass region despitebeing strongly suppressed by the dilepton invariant mass cut. The expected background in thehighest mass bin, of more than 5 TeV width, is far less than one event. The analysis would notbenefit from reducing the background further at the cost of signal efficiency. The event yieldsin data compared to the total expected SM backgrounds are given in Table 1 for a number ofbins of the discriminating four-body 2 (cid:96) j mass distribution. Also shown are the expectationsfor potential (cid:96) ∗ signals with two different sets of model parameter values: a mass M (cid:96) ∗ of 2 TeVand compositeness scale Λ of 10 TeV; and M (cid:96) ∗ = Λ = M (cid:96) ∗ , are calculatedusing the Bayesian method [58] with a uniform positive prior probability distribution for thesignal cross section. Systematic uncertainties in the expected signal and background yields areincluded either via nuisance parameters with log-normal prior distributions or with the shapeof the distribution included through the use of a binned likelihood.Limits at 95% confidence level (CL) on the product of cross section and branching fractionassuming the proper branching fraction for M (cid:96) ∗ = Λ and f = f (cid:48) = M (cid:96) ∗ below5.6 and 5.7 TeV, respectively, assuming that Λ is equal to the mass of the excited leptons. These − − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4electron channel DataDYttSingle tMultibosonW+jets = 10 TeV Λ = 2 TeV e* M = 5 TeV Λ = 5 TeV e* Msyst. + stat. uncert. [TeV] eejj M D a t a / M C − − − −
10 110 E v en t s / G e V CMS (13 TeV) -1 fb77.4muon channel DataDYttSingle tMultibosonW+jets = 10 TeV Λ = 2 TeV * µ M = 5 TeV Λ = 5 TeV * µ Msyst. + stat. uncert. [TeV] jj µµ M D a t a / M C Figure 7: Distribution of the two-lepton two-jet invariant mass in the signal region ( M (cid:96)(cid:96) >
500 GeV) for the electron (left) and muon (right) channels. The example signal shape for twoexcited lepton masses is indicated as a gray line with the parameters given in the legend andfor the benchmark case where the couplings f and f (cid:48) are set to unity. The lower panels showthe ratio of data to simulation with the total uncertainty in gray.Table 1: Observed event yields in bins of four-body mass compared to the expected SM back-ground, for the 2 e j and 2 µ j final states. Also shown are the expected event yields for twosimulated signal samples with the given masses and couplings. All yields are given in bins ofthe discriminating four-body mass (2 (cid:96) j ) distribution, with lower and upper value for each bingiven in units of GeV. Systematic uncertainties, as described in the text, are shown. Bins in 2 (cid:96) j mass (GeV)800–1600 1600–2500 2500–3250 3250–4500 4500–10000Data in 2 e j
359 70 6 5 0SM prediction 362 + − ±
12 10.3 + − + − + − f = f (cid:48) = M e ∗ = Λ =
10 TeV 0.17 + − ± ± ± ± M e ∗ = Λ = + − ± ± + − ± f = f (cid:48) = M e ∗ = Λ =
10 TeV 0.53 ± + − + − ± ± M e ∗ = Λ = + − ± ± + − ± µ j
889 111 9 2 1SM prediction 842 + − + − ± + − + − f = f (cid:48) = M µ ∗ = Λ =
10 TeV 0.30 ± + − + − + − ± M µ ∗ = Λ = ± ± + − ± + − f = f (cid:48) = M µ ∗ = Λ =
10 TeV 0.92 + − + − + − + − + − M µ ∗ = Λ = ± ± + − ± + − are the best limits to date on excited electrons and muons. At low masses, the sensitivity is de-termined by the acceptance and analysis selection. At very high mass, the sensitivity becomeslimited by the cross section. The sensitivity to the maximum (cid:96) ∗ mass is not affected by thecoupling strength. M e* [TeV] − −
10 110 j ( C I )) [f b ] → ( ee * σ electron channel
95% CL upper limitsObservedMedian expected68% expected95% expected= 10 TeV Λ l* = M Λ (13 TeV) -1 fb77.4 CMS 𝔅 × M μ * [TeV] − −
10 110 j ( C I )) [f b ] µ → * µµ ( σ
95% CL upper limitsObservedMedian expected68% expected95% expected= 10 TeV Λ l* = M Λ (13 TeV) -1 fb77.4 CMS muon channel × 𝔅 Figure 8: Limits at 95% CL on the product of the production cross section and branching frac-tion for (cid:96)(cid:96) ∗ → (cid:96)(cid:96) jj , as a function of the excited lepton mass M (cid:96) ∗ , for the electron (left) and muon(right) channels. The expectation from the model is represented for | f | = | f (cid:48) | = Λ =
10 TeV, and Λ = M (cid:96) ∗ .The cross section limit can be re-evaluated in terms of the compositeness scale Λ as a functionof the excited lepton mass. This sensitivity does depend on the coupling strength. Figures 9–11show the variations in the compositeness scale Λ for the gauge couplings | f | and | f (cid:48) | equal tounity, for | f | and | f (cid:48) | equal to 0.1, and for f and f (cid:48) equal to zero, respectively. Compositenessscales below 5 TeV are excluded for all investigated (cid:96) ∗ masses. Maximum sensitivity to Λ isreached at low masses, as is typical for excited lepton searches. The exact mass for this peaksensitivity depends on the coupling scenario, decreasing with weaker GI couplings, and caneasily be understood from Fig. 2. Detailed numbers are given in Table 2. In the case of f = f (cid:48) =
1, compositeness scales up to 11 TeV (e ∗ ) and 12 TeV ( µ ∗ ) are excluded, with the maximumsensitivity for (cid:96) ∗ masses around 2 TeV. With values for f = f (cid:48) = Λ sensitivity of 17 TeV (e ∗ ) and 19 TeV ( µ ∗ ), respectively, for (cid:96) ∗ masses around 1.5 TeV. Assuming zero GI couplings, the observed Λ sensitivity increasesto 18 TeV (e ∗ ) and 22 TeV ( µ ∗ ), respectively, for (cid:96) ∗ masses around 1 TeV. While the expectedsensitivities in the electron and muon channels are comparable, the observed muon channelsensitivity is up to one standard deviation higher due to fluctuations in the data. For M (cid:96) ∗ above2 TeV these are the best limits to date. In the scenario f = − f (cid:48) , where (cid:96)(cid:96) γ has no sensitivity,this CI channel provides the best test of high compositeness scales. M e* [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expected
Electron Channel M μ * [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expectedMuon Channel
Figure 9: Limits on the compositeness scale Λ for the electron (left) and muon (right) channels,as a function of the mass of the excited lepton, for the benchmark case where the GI couplings | f | and | f (cid:48) | are set to one. The model is not valid in the hatched area. M e* [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expectedElectron Channel M μ * [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expectedMuon Channel
Figure 10: Limits on the compositeness scale Λ for the electron (left) and muon (right) channels,as a function of the mass of the excited lepton, for the case where the GI couplings | f | and | f (cid:48) | are set to 0.1. The model is not valid in the hatched area. M e* [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expectedElectron Channel M μ * [TeV] [ T e V ] Λ (13 TeV) -1 fb77.4 CMS
95% CL upper limitsObservedMedian expected68% expected95% expectedMuon Channel
Figure 11: Limits on the compositeness scale Λ for the electron (left) and muon (right) channels,as a function of the mass of the excited lepton, for the benchmark case where the GI couplings f and f (cid:48) vanish. The model is not valid in the hatched area. A search for excited leptons decaying via a contact interaction to final states of two electronsor two muons and two resolved jets has been performed. This channel complements othersearches for excited leptons. It has greatest sensitivity at large values of the excited lepton mass M (cid:96) ∗ . The data for this analysis were recorded with the CMS detector in the years 2016 and2017, corresponding to a total integrated luminosity of 77.4 fb − of proton-proton collisions ata center-of-mass energy of 13 TeV.No significant deviations from SM expectations are observed in the signal region and 95%exclusion limits have been set. Excited electrons (muons) up to masses of M e ∗ = M µ ∗ = M (cid:96) ∗ = Λ . These are the best limits to date.The limit was also re-evaluated in terms of the substructure scale Λ , leading to limits of Λ = M (cid:96) ∗ does not change, but the larger cross section increases the Λ sensitivity at lower masses. Forcouplings around zero, where the (cid:96)(cid:96) γ decay has no sensitivity, limits around 20 TeV for thecompositeness scale Λ are achieved.Table 2: Summary of the observed (expected) limits on (cid:96) ∗ mass, assuming M (cid:96) ∗ = Λ , for the cases f = f (cid:48) and f = − f (cid:48) . The limits evaluated in terms of the compositeness scale Λ are shown inthe right column.Search channel Coupling M (cid:96) ∗ = Λ , values in TeV Limit on Λ , in TeVstrength f = f (cid:48) f = − f (cid:48) ee ∗ → j f = M (cid:96) ∗ ≈ f = M (cid:96) ∗ ≈ f = M (cid:96) ∗ ≈ µµ ∗ → µ j f = M (cid:96) ∗ ≈ f = M (cid:96) ∗ ≈ f = M (cid:96) ∗ ≈ Acknowledgments
We congratulate our colleagues in the CERN accelerator departments for the excellent perfor-mance of the LHC and thank the technical and administrative staffs at CERN and at other CMSinstitutes for their contributions to the success of the CMS effort. In addition, we gratefullyacknowledge the computing centers and personnel of the Worldwide LHC Computing Gridfor delivering so effectively the computing infrastructure essential to our analyses. Finally,we acknowledge the enduring support for the construction and operation of the LHC and theCMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRSand FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria);CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia);RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, PUT and ERDF (Estonia); Academyof Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF(Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland);INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM(Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Mon-tenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal);JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI,CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); eferences MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey);NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA).Individuals have received support from the Marie-Curie program and the European ResearchCouncil and Horizon 2020 Grant, contract Nos. 675440, 752730, and 765710 (European Union);the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Founda-tion; the Belgian Federal Science Policy Office; the Fonds pour la Formation `a la Recherchedans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie doorWetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the“Excellence of Science – EOS” – be.h project n. 30820817; the Beijing Municipal Science &Technology Commission, No. Z191100007219010; the Ministry of Education, Youth and Sports(MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG) under GermanysExcellence Strategy – EXC 2121 “Quantum Universe” – 390833306; the Lend ¨ulet (“Momen-tum”) Program and the J´anos Bolyai Research Scholarship of the Hungarian Academy of Sci-ences, the New National Excellence Program ´UNKP, the NKFIA research grants 123842, 123959,124845, 124850, 125105, 128713, 128786, and 129058 (Hungary); the Council of Science and In-dustrial Research, India; the HOMING PLUS program of the Foundation for Polish Science,cofinanced from European Union, Regional Development Fund, the Mobility Plus program ofthe Ministry of Science and Higher Education, the National Science Center (Poland), contractsHarmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the National Priorities ResearchProgram by Qatar National Research Fund; the Ministry of Science and Education, grantno. 14.W03.31.0026 (Russia); the Programa Estatal de Fomento de la Investigaci ´on Cient´ıficay T´ecnica de Excelencia Mar´ıa de Maeztu, grant MDM-2015-0509 and the Programa SeveroOchoa del Principado de Asturias; the Thalis and Aristeia programs cofinanced by EU-ESF andthe Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, ChulalongkornUniversity and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project(Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; theWelch Foundation, contract C-1845; and the Weston Havens Foundation (USA).
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Yerevan Physics Institute, Yerevan, Armenia
A.M. Sirunyan † , A. Tumasyan Institut f ¨ur Hochenergiephysik, Wien, Austria
W. Adam, F. Ambrogi, T. Bergauer, J. Brandstetter, M. Dragicevic, J. Er ¨o, A. Escalante Del Valle,M. Flechl, R. Fr ¨uhwirth , M. Jeitler , N. Krammer, I. Kr¨atschmer, D. Liko, T. Madlener,I. Mikulec, N. Rad, J. Schieck , R. Sch ¨ofbeck, M. Spanring, D. Spitzbart, W. Waltenberger, C.-E. Wulz , M. Zarucki Institute for Nuclear Problems, Minsk, Belarus
V. Drugakov, V. Mossolov, J. Suarez Gonzalez
Universiteit Antwerpen, Antwerpen, Belgium
M.R. Darwish, E.A. De Wolf, D. Di Croce, X. Janssen, J. Lauwers, A. Lelek, M. Pieters,H. Rejeb Sfar, H. Van Haevermaet, P. Van Mechelen, S. Van Putte, N. Van Remortel
Vrije Universiteit Brussel, Brussel, Belgium
F. Blekman, E.S. Bols, S.S. Chhibra, J. D’Hondt, J. De Clercq, D. Lontkovskyi, S. Lowette,I. Marchesini, S. Moortgat, L. Moreels, Q. Python, K. Skovpen, S. Tavernier, W. Van Doninck,P. Van Mulders, I. Van Parijs
Universit´e Libre de Bruxelles, Bruxelles, Belgium
D. Beghin, B. Bilin, H. Brun, B. Clerbaux, G. De Lentdecker, H. Delannoy, B. Dorney,L. Favart, A. Grebenyuk, A.K. Kalsi, J. Luetic, A. Popov, N. Postiau, E. Starling, L. Thomas,C. Vander Velde, P. Vanlaer, D. Vannerom, Q. Wang
Ghent University, Ghent, Belgium
T. Cornelis, D. Dobur, I. Khvastunov , C. Roskas, D. Trocino, M. Tytgat, W. Verbeke,B. Vermassen, M. Vit, N. Zaganidis Universit´e Catholique de Louvain, Louvain-la-Neuve, Belgium
O. Bondu, G. Bruno, C. Caputo, P. David, C. Delaere, M. Delcourt, A. Giammanco, V. Lemaitre,A. Magitteri, J. Prisciandaro, A. Saggio, M. Vidal Marono, P. Vischia, J. Zobec
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
F.L. Alves, G.A. Alves, G. Correia Silva, C. Hensel, A. Moraes, P. Rebello Teles
Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
E. Belchior Batista Das Chagas, W. Carvalho, J. Chinellato , E. Coelho, E.M. Da Costa,G.G. Da Silveira , D. De Jesus Damiao, C. De Oliveira Martins, S. Fonseca De Souza,L.M. Huertas Guativa, H. Malbouisson, J. Martins , D. Matos Figueiredo, M. Medina Jaime ,M. Melo De Almeida, C. Mora Herrera, L. Mundim, H. Nogima, W.L. Prado Da Silva,L.J. Sanchez Rosas, A. Santoro, A. Sznajder, M. Thiel, E.J. Tonelli Manganote , F. Tor-res Da Silva De Araujo, A. Vilela Pereira Universidade Estadual Paulista a , Universidade Federal do ABC b , S˜ao Paulo, Brazil S. Ahuja a , C.A. Bernardes a , L. Calligaris a , T.R. Fernandez Perez Tomei a , E.M. Gregores b ,D.S. Lemos, P.G. Mercadante b , S.F. Novaes a , SandraS. Padula a Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia,Bulgaria
A. Aleksandrov, G. Antchev, R. Hadjiiska, P. Iaydjiev, A. Marinov, M. Misheva, M. Rodozov,M. Shopova, G. Sultanov University of Sofia, Sofia, Bulgaria
M. Bonchev, A. Dimitrov, T. Ivanov, L. Litov, B. Pavlov, P. Petkov
Beihang University, Beijing, China
W. Fang , X. Gao , L. Yuan Department of Physics, Tsinghua University, Beijing, China
Z. Hu, Y. Wang
Institute of High Energy Physics, Beijing, China
M. Ahmad, G.M. Chen, H.S. Chen, M. Chen, C.H. Jiang, D. Leggat, H. Liao, Z. Liu,S.M. Shaheen , A. Spiezia, J. Tao, E. Yazgan, H. Zhang, S. Zhang , J. Zhao State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
A. Agapitos, Y. Ban, G. Chen, A. Levin, J. Li, L. Li, Q. Li, Y. Mao, S.J. Qian, D. Wang
Universidad de Los Andes, Bogota, Colombia
C. Avila, A. Cabrera, L.F. Chaparro Sierra, C. Florez, C.F. Gonz´alez Hern´andez, M.A. Se-gura Delgado
Universidad de Antioquia, Medellin, Colombia
J. Mejia Guisao, J.D. Ruiz Alvarez, C.A. Salazar Gonz´alez, N. Vanegas Arbelaez
University of Split, Faculty of Electrical Engineering, Mechanical Engineering and NavalArchitecture, Split, Croatia
D. Giljanovi´c, N. Godinovic, D. Lelas, I. Puljak, T. Sculac
University of Split, Faculty of Science, Split, Croatia
Z. Antunovic, M. Kovac
Institute Rudjer Boskovic, Zagreb, Croatia
V. Brigljevic, S. Ceci, D. Ferencek, K. Kadija, B. Mesic, M. Roguljic, A. Starodumov , T. Susa University of Cyprus, Nicosia, Cyprus
M.W. Ather, A. Attikis, E. Erodotou, A. Ioannou, M. Kolosova, S. Konstantinou, G. Mavro-manolakis, J. Mousa, C. Nicolaou, F. Ptochos, P.A. Razis, H. Rykaczewski, D. Tsiakkouri
Charles University, Prague, Czech Republic
M. Finger , M. Finger Jr. , A. Kveton, J. Tomsa Escuela Politecnica Nacional, Quito, Ecuador
E. Ayala
Universidad San Francisco de Quito, Quito, Ecuador
E. Carrera Jarrin
Academy of Scientific Research and Technology of the Arab Republic of Egypt, EgyptianNetwork of High Energy Physics, Cairo, Egypt
Y. Assran , S. Elgammal National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
S. Bhowmik, A. Carvalho Antunes De Oliveira, R.K. Dewanjee, K. Ehataht, M. Kadastik,M. Raidal, C. Veelken
Department of Physics, University of Helsinki, Helsinki, Finland
P. Eerola, L. Forthomme, H. Kirschenmann, K. Osterberg, M. Voutilainen Helsinki Institute of Physics, Helsinki, Finland
F. Garcia, J. Havukainen, J.K. Heikkil¨a, T. J¨arvinen, V. Karim¨aki, R. Kinnunen, T. Lamp´en,K. Lassila-Perini, S. Laurila, S. Lehti, T. Lind´en, P. Luukka, T. M¨aenp¨a¨a, H. Siikonen,E. Tuominen, J. Tuominiemi
Lappeenranta University of Technology, Lappeenranta, Finland
T. Tuuva
IRFU, CEA, Universit´e Paris-Saclay, Gif-sur-Yvette, France
M. Besancon, F. Couderc, M. Dejardin, D. Denegri, B. Fabbro, J.L. Faure, F. Ferri, S. Ganjour,A. Givernaud, P. Gras, G. Hamel de Monchenault, P. Jarry, C. Leloup, E. Locci, J. Malcles,J. Rander, A. Rosowsky, M. ¨O. Sahin, A. Savoy-Navarro , M. Titov Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechniquede Paris
C. Amendola, F. Beaudette, P. Busson, C. Charlot, B. Diab, G. Falmagne, R. Granier de Cas-sagnac, I. Kucher, A. Lobanov, C. Martin Perez, M. Nguyen, C. Ochando, P. Paganini,J. Rembser, R. Salerno, J.B. Sauvan, Y. Sirois, A. Zabi, A. Zghiche
Universit´e de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
J.-L. Agram , J. Andrea, D. Bloch, G. Bourgatte, J.-M. Brom, E.C. Chabert, C. Collard,E. Conte , J.-C. Fontaine , D. Gel´e, U. Goerlach, M. Jansov´a, A.-C. Le Bihan, N. Tonon,P. Van Hove Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules,CNRS/IN2P3, Villeurbanne, France
S. Gadrat
Universit´e de Lyon, Universit´e Claude Bernard Lyon 1, CNRS-IN2P3, Institut de PhysiqueNucl´eaire de Lyon, Villeurbanne, France
S. Beauceron, C. Bernet, G. Boudoul, C. Camen, N. Chanon, R. Chierici, D. Contardo,P. Depasse, H. El Mamouni, J. Fay, S. Gascon, M. Gouzevitch, B. Ille, Sa. Jain, F. Lagarde,I.B. Laktineh, H. Lattaud, M. Lethuillier, L. Mirabito, S. Perries, V. Sordini, G. Touquet,M. Vander Donckt, S. Viret
Georgian Technical University, Tbilisi, Georgia
T. Toriashvili Tbilisi State University, Tbilisi, Georgia
Z. Tsamalaidze RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
C. Autermann, L. Feld, M.K. Kiesel, K. Klein, M. Lipinski, D. Meuser, A. Pauls, M. Preuten,M.P. Rauch, C. Schomakers, J. Schulz, M. Teroerde, B. Wittmer
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
A. Albert, M. Erdmann, S. Erdweg, T. Esch, B. Fischer, R. Fischer, S. Ghosh, T. Hebbeker,K. Hoepfner, H. Keller, L. Mastrolorenzo, M. Merschmeyer, A. Meyer, P. Millet, G. Mocellin,S. Mondal, S. Mukherjee, D. Noll, A. Novak, T. Pook, A. Pozdnyakov, T. Quast, M. Radziej,Y. Rath, H. Reithler, M. Rieger, J. Roemer, A. Schmidt, S.C. Schuler, A. Sharma, S. Th ¨uer,S. Wiedenbeck
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
G. Fl ¨ugge, W. Haj Ahmad , O. Hlushchenko, T. Kress, T. M ¨uller, A. Nehrkorn, A. Nowack,C. Pistone, O. Pooth, D. Roy, H. Sert, A. Stahl Deutsches Elektronen-Synchrotron, Hamburg, Germany
M. Aldaya Martin, P. Asmuss, I. Babounikau, H. Bakhshiansohi, K. Beernaert, O. Behnke,U. Behrens, A. Berm ´udez Mart´ınez, D. Bertsche, A.A. Bin Anuar, K. Borras , V. Botta,A. Campbell, A. Cardini, P. Connor, S. Consuegra Rodr´ıguez, C. Contreras-Campana,V. Danilov, A. De Wit, M.M. Defranchis, C. Diez Pardos, D. Dom´ınguez Damiani, G. Eckerlin,D. Eckstein, T. Eichhorn, A. Elwood, E. Eren, E. Gallo , A. Geiser, J.M. Grados Luyando,A. Grohsjean, M. Guthoff, M. Haranko, A. Harb, A. Jafari, N.Z. Jomhari, H. Jung, A. Kasem ,M. Kasemann, H. Kaveh, J. Keaveney, C. Kleinwort, J. Knolle, D. Kr ¨ucker, W. Lange,T. Lenz, J. Leonard, J. Lidrych, K. Lipka, W. Lohmann , R. Mankel, I.-A. Melzer-Pellmann,A.B. Meyer, M. Meyer, M. Missiroli, G. Mittag, J. Mnich, A. Mussgiller, V. Myronenko,D. P´erez Ad´an, S.K. Pflitsch, D. Pitzl, A. Raspereza, A. Saibel, M. Savitskyi, V. Scheurer,P. Sch ¨utze, C. Schwanenberger, R. Shevchenko, A. Singh, H. Tholen, O. Turkot, A. Vagnerini,M. Van De Klundert, G.P. Van Onsem, R. Walsh, Y. Wen, K. Wichmann, C. Wissing, O. Zenaiev,R. Zlebcik University of Hamburg, Hamburg, Germany
R. Aggleton, S. Bein, L. Benato, A. Benecke, V. Blobel, T. Dreyer, A. Ebrahimi, A. Fr ¨ohlich,C. Garbers, E. Garutti, D. Gonzalez, P. Gunnellini, J. Haller, A. Hinzmann, A. Karavdina,G. Kasieczka, R. Klanner, R. Kogler, N. Kovalchuk, S. Kurz, V. Kutzner, J. Lange, T. Lange,A. Malara, D. Marconi, J. Multhaup, M. Niedziela, C.E.N. Niemeyer, D. Nowatschin,A. Perieanu, A. Reimers, O. Rieger, C. Scharf, P. Schleper, S. Schumann, J. Schwandt,J. Sonneveld, H. Stadie, G. Steinbr ¨uck, F.M. Stober, M. St ¨over, B. Vormwald, I. Zoi
Karlsruher Institut fuer Technologie, Karlsruhe, Germany
M. Akbiyik, C. Barth, M. Baselga, S. Baur, T. Berger, E. Butz, R. Caspart, T. Chwalek, W. De Boer,A. Dierlamm, K. El Morabit, N. Faltermann, M. Giffels, P. Goldenzweig, A. Gottmann,M.A. Harrendorf, F. Hartmann , U. Husemann, S. Kudella, S. Mitra, M.U. Mozer, Th. M ¨uller,M. Musich, A. N ¨urnberg, G. Quast, K. Rabbertz, M. Schr ¨oder, I. Shvetsov, H.J. Simonis,R. Ulrich, M. Weber, C. W ¨ohrmann, R. Wolf Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi,Greece
G. Anagnostou, P. Asenov, G. Daskalakis, T. Geralis, A. Kyriakis, D. Loukas, G. Paspalaki
National and Kapodistrian University of Athens, Athens, Greece
M. Diamantopoulou, G. Karathanasis, P. Kontaxakis, A. Panagiotou, I. Papavergou,N. Saoulidou, A. Stakia, K. Theofilatos, K. Vellidis
National Technical University of Athens, Athens, Greece
G. Bakas, K. Kousouris, I. Papakrivopoulos, G. Tsipolitis
University of Io´annina, Io´annina, Greece
I. Evangelou, C. Foudas, P. Gianneios, P. Katsoulis, P. Kokkas, S. Mallios, K. Manitara,N. Manthos, I. Papadopoulos, J. Strologas, F.A. Triantis, D. Tsitsonis
MTA-ELTE Lend ¨ulet CMS Particle and Nuclear Physics Group, E ¨otv ¨os Lor´and University,Budapest, Hungary
M. Bart ´ok , M. Csanad, P. Major, K. Mandal, A. Mehta, M.I. Nagy, G. Pasztor, O. Sur´anyi,G.I. Veres Wigner Research Centre for Physics, Budapest, Hungary
G. Bencze, C. Hajdu, D. Horvath , F. Sikler, T. ´A. V´ami, V. Veszpremi, G. Vesztergombi † Institute of Nuclear Research ATOMKI, Debrecen, Hungary
N. Beni, S. Czellar, J. Karancsi , A. Makovec, J. Molnar, Z. Szillasi Institute of Physics, University of Debrecen, Debrecen, Hungary
P. Raics, D. Teyssier, Z.L. Trocsanyi, B. Ujvari
Eszterhazy Karoly University, Karoly Robert Campus, Gyongyos, Hungary
T. Csorgo, W.J. Metzger, F. Nemes, T. Novak
Indian Institute of Science (IISc), Bangalore, India
S. Choudhury, J.R. Komaragiri, P.C. Tiwari
National Institute of Science Education and Research, HBNI, Bhubaneswar, India
S. Bahinipati , C. Kar, G. Kole, P. Mal, V.K. Muraleedharan Nair Bindhu, A. Nayak ,D.K. Sahoo , S.K. Swain Panjab University, Chandigarh, India
S. Bansal, S.B. Beri, V. Bhatnagar, S. Chauhan, R. Chawla, N. Dhingra, R. Gupta, A. Kaur,M. Kaur, S. Kaur, P. Kumari, M. Lohan, M. Meena, K. Sandeep, S. Sharma, J.B. Singh, A.K. Virdi,G. Walia
University of Delhi, Delhi, India
A. Bhardwaj, B.C. Choudhary, R.B. Garg, M. Gola, S. Keshri, Ashok Kumar, S. Malhotra,M. Naimuddin, P. Priyanka, K. Ranjan, Aashaq Shah, R. Sharma
Saha Institute of Nuclear Physics, HBNI, Kolkata, India
R. Bhardwaj , M. Bharti , R. Bhattacharya, S. Bhattacharya, U. Bhawandeep , D. Bhowmik,S. Dey, S. Dutta, S. Ghosh, M. Maity , K. Mondal, S. Nandan, A. Purohit, P.K. Rout, G. Saha,S. Sarkar, T. Sarkar , M. Sharan, B. Singh , S. Thakur Indian Institute of Technology Madras, Madras, India
P.K. Behera, P. Kalbhor, A. Muhammad, P.R. Pujahari, A. Sharma, A.K. Sikdar
Bhabha Atomic Research Centre, Mumbai, India
R. Chudasama, D. Dutta, V. Jha, V. Kumar, D.K. Mishra, P.K. Netrakanti, L.M. Pant, P. Shukla
Tata Institute of Fundamental Research-A, Mumbai, India
T. Aziz, M.A. Bhat, S. Dugad, G.B. Mohanty, N. Sur, RavindraKumar Verma
Tata Institute of Fundamental Research-B, Mumbai, India
S. Banerjee, S. Bhattacharya, S. Chatterjee, P. Das, M. Guchait, S. Karmakar, S. Kumar,G. Majumder, K. Mazumdar, N. Sahoo, S. Sawant
Indian Institute of Science Education and Research (IISER), Pune, India
S. Chauhan, S. Dube, V. Hegde, A. Kapoor, K. Kothekar, S. Pandey, A. Rane, A. Rastogi,S. Sharma
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
S. Chenarani , E. Eskandari Tadavani, S.M. Etesami , M. Khakzad, M. Mohammadi Na-jafabadi, M. Naseri, F. Rezaei Hosseinabadi University College Dublin, Dublin, Ireland
M. Felcini, M. Grunewald
INFN Sezione di Bari a , Universit`a di Bari b , Politecnico di Bari c , Bari, Italy M. Abbrescia a , b , C. Calabria a , b , A. Colaleo a , D. Creanza a , c , L. Cristella a , b , N. De Filippis a , c ,M. De Palma a , b , A. Di Florio a , b , L. Fiore a , A. Gelmi a , b , G. Iaselli a , c , M. Ince a , b , S. Lezki a , b , G. Maggi a , c , M. Maggi a , G. Miniello a , b , S. My a , b , S. Nuzzo a , b , A. Pompili a , b , G. Pugliese a , c ,R. Radogna a , A. Ranieri a , G. Selvaggi a , b , L. Silvestris a , R. Venditti a , P. Verwilligen a INFN Sezione di Bologna a , Universit`a di Bologna b , Bologna, Italy G. Abbiendi a , C. Battilana a , b , D. Bonacorsi a , b , L. Borgonovi a , b , S. Braibant-Giacomelli a , b ,R. Campanini a , b , P. Capiluppi a , b , A. Castro a , b , F.R. Cavallo a , C. Ciocca a , G. Codispoti a , b ,M. Cuffiani a , b , G.M. Dallavalle a , F. Fabbri a , A. Fanfani a , b , E. Fontanesi, P. Giacomelli a ,C. Grandi a , L. Guiducci a , b , F. Iemmi a , b , S. Lo Meo a ,29 , S. Marcellini a , G. Masetti a ,F.L. Navarria a , b , A. Perrotta a , F. Primavera a , b , A.M. Rossi a , b , T. Rovelli a , b , G.P. Siroli a , b , N. Tosi a INFN Sezione di Catania a , Universit`a di Catania b , Catania, Italy S. Albergo a , b ,30 , S. Costa a , b , A. Di Mattia a , R. Potenza a , b , A. Tricomi a , b ,30 , C. Tuve a , b INFN Sezione di Firenze a , Universit`a di Firenze b , Firenze, Italy G. Barbagli a , R. Ceccarelli, K. Chatterjee a , b , V. Ciulli a , b , C. Civinini a , R. D’Alessandro a , b ,E. Focardi a , b , G. Latino, P. Lenzi a , b , M. Meschini a , S. Paoletti a , G. Sguazzoni a , D. Strom a ,L. Viliani a INFN Laboratori Nazionali di Frascati, Frascati, Italy
L. Benussi, S. Bianco, D. Piccolo
INFN Sezione di Genova a , Universit`a di Genova b , Genova, Italy M. Bozzo a , b , F. Ferro a , R. Mulargia a , b , E. Robutti a , S. Tosi a , b INFN Sezione di Milano-Bicocca a , Universit`a di Milano-Bicocca b , Milano, Italy A. Benaglia a , A. Beschi a , b , F. Brivio a , b , V. Ciriolo a , b ,17 , S. Di Guida a , b ,17 , M.E. Dinardo a , b , P. Dini a ,S. Fiorendi a , b , S. Gennai a , A. Ghezzi a , b , P. Govoni a , b , L. Guzzi a , b , M. Malberti a , S. Malvezzi a ,D. Menasce a , F. Monti a , b , L. Moroni a , G. Ortona a , b , M. Paganoni a , b , D. Pedrini a , S. Ragazzi a , b ,T. Tabarelli de Fatis a , b , D. Zuolo a , b INFN Sezione di Napoli a , Universit`a di Napoli ’Federico II’ b , Napoli, Italy, Universit`a dellaBasilicata c , Potenza, Italy, Universit`a G. Marconi d , Roma, Italy S. Buontempo a , N. Cavallo a , c , A. De Iorio a , b , A. Di Crescenzo a , b , F. Fabozzi a , c , F. Fienga a ,G. Galati a , A.O.M. Iorio a , b , L. Lista a , b , S. Meola a , d ,17 , P. Paolucci a ,17 , B. Rossi a , C. Sciacca a , b ,E. Voevodina a , b INFN Sezione di Padova a , Universit`a di Padova b , Padova, Italy, Universit`a di Trento c ,Trento, Italy P. Azzi a , N. Bacchetta a , D. Bisello a , b , A. Boletti a , b , A. Bragagnolo, R. Carlin a , b , P. Checchia a ,P. De Castro Manzano a , T. Dorigo a , U. Dosselli a , F. Gasparini a , b , U. Gasparini a , b , A. Gozzelino a ,S.Y. Hoh, P. Lujan, M. Margoni a , b , A.T. Meneguzzo a , b , J. Pazzini a , b , M. Presilla b , P. Ronchese a , b ,R. Rossin a , b , F. Simonetto a , b , A. Tiko, M. Tosi a , b , M. Zanetti a , b , P. Zotto a , b , G. Zumerle a , b INFN Sezione di Pavia a , Universit`a di Pavia b , Pavia, Italy A. Braghieri a , P. Montagna a , b , S.P. Ratti a , b , V. Re a , M. Ressegotti a , b , C. Riccardi a , b , P. Salvini a ,I. Vai a , b , P. Vitulo a , b INFN Sezione di Perugia a , Universit`a di Perugia b , Perugia, Italy M. Biasini a , b , G.M. Bilei a , C. Cecchi a , b , D. Ciangottini a , b , L. Fan `o a , b , P. Lariccia a , b , R. Leonardi a , b ,E. Manoni a , G. Mantovani a , b , V. Mariani a , b , M. Menichelli a , A. Rossi a , b , A. Santocchia a , b ,D. Spiga a INFN Sezione di Pisa a , Universit`a di Pisa b , Scuola Normale Superiore di Pisa c , Pisa, Italy K. Androsov a , P. Azzurri a , G. Bagliesi a , V. Bertacchi a , c , L. Bianchini a , T. Boccali a ,R. Castaldi a , M.A. Ciocci a , b , R. Dell’Orso a , G. Fedi a , L. Giannini a , c , A. Giassi a , M.T. Grippo a ,7
INFN Sezione di Genova a , Universit`a di Genova b , Genova, Italy M. Bozzo a , b , F. Ferro a , R. Mulargia a , b , E. Robutti a , S. Tosi a , b INFN Sezione di Milano-Bicocca a , Universit`a di Milano-Bicocca b , Milano, Italy A. Benaglia a , A. Beschi a , b , F. Brivio a , b , V. Ciriolo a , b ,17 , S. Di Guida a , b ,17 , M.E. Dinardo a , b , P. Dini a ,S. Fiorendi a , b , S. Gennai a , A. Ghezzi a , b , P. Govoni a , b , L. Guzzi a , b , M. Malberti a , S. Malvezzi a ,D. Menasce a , F. Monti a , b , L. Moroni a , G. Ortona a , b , M. Paganoni a , b , D. Pedrini a , S. Ragazzi a , b ,T. Tabarelli de Fatis a , b , D. Zuolo a , b INFN Sezione di Napoli a , Universit`a di Napoli ’Federico II’ b , Napoli, Italy, Universit`a dellaBasilicata c , Potenza, Italy, Universit`a G. Marconi d , Roma, Italy S. Buontempo a , N. Cavallo a , c , A. De Iorio a , b , A. Di Crescenzo a , b , F. Fabozzi a , c , F. Fienga a ,G. Galati a , A.O.M. Iorio a , b , L. Lista a , b , S. Meola a , d ,17 , P. Paolucci a ,17 , B. Rossi a , C. Sciacca a , b ,E. Voevodina a , b INFN Sezione di Padova a , Universit`a di Padova b , Padova, Italy, Universit`a di Trento c ,Trento, Italy P. Azzi a , N. Bacchetta a , D. Bisello a , b , A. Boletti a , b , A. Bragagnolo, R. Carlin a , b , P. Checchia a ,P. De Castro Manzano a , T. Dorigo a , U. Dosselli a , F. Gasparini a , b , U. Gasparini a , b , A. Gozzelino a ,S.Y. Hoh, P. Lujan, M. Margoni a , b , A.T. Meneguzzo a , b , J. Pazzini a , b , M. Presilla b , P. Ronchese a , b ,R. Rossin a , b , F. Simonetto a , b , A. Tiko, M. Tosi a , b , M. Zanetti a , b , P. Zotto a , b , G. Zumerle a , b INFN Sezione di Pavia a , Universit`a di Pavia b , Pavia, Italy A. Braghieri a , P. Montagna a , b , S.P. Ratti a , b , V. Re a , M. Ressegotti a , b , C. Riccardi a , b , P. Salvini a ,I. Vai a , b , P. Vitulo a , b INFN Sezione di Perugia a , Universit`a di Perugia b , Perugia, Italy M. Biasini a , b , G.M. Bilei a , C. Cecchi a , b , D. Ciangottini a , b , L. Fan `o a , b , P. Lariccia a , b , R. Leonardi a , b ,E. Manoni a , G. Mantovani a , b , V. Mariani a , b , M. Menichelli a , A. Rossi a , b , A. Santocchia a , b ,D. Spiga a INFN Sezione di Pisa a , Universit`a di Pisa b , Scuola Normale Superiore di Pisa c , Pisa, Italy K. Androsov a , P. Azzurri a , G. Bagliesi a , V. Bertacchi a , c , L. Bianchini a , T. Boccali a ,R. Castaldi a , M.A. Ciocci a , b , R. Dell’Orso a , G. Fedi a , L. Giannini a , c , A. Giassi a , M.T. Grippo a ,7 F. Ligabue a , c , E. Manca a , c , G. Mandorli a , c , A. Messineo a , b , F. Palla a , A. Rizzi a , b , G. Rolandi ,S. Roy Chowdhury, A. Scribano a , P. Spagnolo a , R. Tenchini a , G. Tonelli a , b , N. Turini, A. Venturi a ,P.G. Verdini a INFN Sezione di Roma a , Sapienza Universit`a di Roma b , Rome, Italy F. Cavallari a , M. Cipriani a , b , D. Del Re a , b , E. Di Marco a , b , M. Diemoz a , E. Longo a , b ,B. Marzocchi a , b , P. Meridiani a , G. Organtini a , b , F. Pandolfi a , R. Paramatti a , b , C. Quaranta a , b ,S. Rahatlou a , b , C. Rovelli a , F. Santanastasio a , b , L. Soffi a , b INFN Sezione di Torino a , Universit`a di Torino b , Torino, Italy, Universit`a del PiemonteOrientale c , Novara, Italy N. Amapane a , b , R. Arcidiacono a , c , S. Argiro a , b , M. Arneodo a , c , N. Bartosik a , R. Bellan a , b ,C. Biino a , A. Cappati a , b , N. Cartiglia a , S. Cometti a , M. Costa a , b , R. Covarelli a , b , N. Demaria a ,B. Kiani a , b , C. Mariotti a , S. Maselli a , E. Migliore a , b , V. Monaco a , b , E. Monteil a , b , M. Monteno a ,M.M. Obertino a , b , L. Pacher a , b , N. Pastrone a , M. Pelliccioni a , G.L. Pinna Angioni a , b ,A. Romero a , b , M. Ruspa a , c , R. Sacchi a , b , R. Salvatico a , b , V. Sola a , A. Solano a , b , D. Soldi a , b ,A. Staiano a INFN Sezione di Trieste a , Universit`a di Trieste b , Trieste, Italy S. Belforte a , V. Candelise a , b , M. Casarsa a , F. Cossutti a , A. Da Rold a , b , G. Della Ricca a , b ,F. Vazzoler a , b , A. Zanetti a Kyungpook National University, Daegu, Korea
B. Kim, D.H. Kim, G.N. Kim, M.S. Kim, J. Lee, S.W. Lee, C.S. Moon, Y.D. Oh, S.I. Pak, S. Sekmen,D.C. Son, Y.C. Yang
Chonnam National University, Institute for Universe and Elementary Particles, Kwangju,Korea
H. Kim, D.H. Moon, G. Oh
Hanyang University, Seoul, Korea
B. Francois, T.J. Kim, J. Park
Korea University, Seoul, Korea
S. Cho, S. Choi, Y. Go, D. Gyun, S. Ha, B. Hong, K. Lee, K.S. Lee, J. Lim, J. Park, S.K. Park,Y. Roh
Kyung Hee University, Department of Physics
J. Goh
Sejong University, Seoul, Korea
H.S. Kim
Seoul National University, Seoul, Korea
J. Almond, J.H. Bhyun, J. Choi, S. Jeon, J. Kim, J.S. Kim, H. Lee, K. Lee, S. Lee, K. Nam, M. Oh,S.B. Oh, B.C. Radburn-Smith, U.K. Yang, H.D. Yoo, I. Yoon, G.B. Yu
University of Seoul, Seoul, Korea
D. Jeon, H. Kim, J.H. Kim, J.S.H. Lee, I.C. Park, I. Watson
Sungkyunkwan University, Suwon, Korea
Y. Choi, C. Hwang, Y. Jeong, J. Lee, Y. Lee, I. Yu
Riga Technical University, Riga, Latvia
V. Veckalns Vilnius University, Vilnius, Lithuania
V. Dudenas, A. Juodagalvis, G. Tamulaitis, J. Vaitkus
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
Z.A. Ibrahim, F. Mohamad Idris , W.A.T. Wan Abdullah, M.N. Yusli, Z. Zolkapli Universidad de Sonora (UNISON), Hermosillo, Mexico
J.F. Benitez, A. Castaneda Hernandez, J.A. Murillo Quijada, L. Valencia Palomo
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
H. Castilla-Valdez, E. De La Cruz-Burelo, I. Heredia-De La Cruz , R. Lopez-Fernandez,A. Sanchez-Hernandez Universidad Iberoamericana, Mexico City, Mexico
S. Carrillo Moreno, C. Oropeza Barrera, M. Ramirez-Garcia, F. Vazquez Valencia
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
J. Eysermans, I. Pedraza, H.A. Salazar Ibarguen, C. Uribe Estrada
Universidad Aut ´onoma de San Luis Potos´ı, San Luis Potos´ı, Mexico
A. Morelos Pineda
University of Montenegro, Podgorica, Montenegro
N. Raicevic
University of Auckland, Auckland, New Zealand
D. Krofcheck
University of Canterbury, Christchurch, New Zealand
S. Bheesette, P.H. Butler
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
A. Ahmad, M. Ahmad, Q. Hassan, H.R. Hoorani, W.A. Khan, M.A. Shah, M. Shoaib, M. Waqas
AGH University of Science and Technology Faculty of Computer Science, Electronics andTelecommunications, Krakow, Poland
V. Avati, L. Grzanka, M. Malawski
National Centre for Nuclear Research, Swierk, Poland
H. Bialkowska, M. Bluj, B. Boimska, M. G ´orski, M. Kazana, M. Szleper, P. Zalewski
Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
K. Bunkowski, A. Byszuk , K. Doroba, A. Kalinowski, M. Konecki, J. Krolikowski, M. Misiura,M. Olszewski, A. Pyskir, M. Walczak Laborat ´orio de Instrumenta¸c˜ao e F´ısica Experimental de Part´ıculas, Lisboa, Portugal
M. Araujo, P. Bargassa, D. Bastos, A. Di Francesco, P. Faccioli, B. Galinhas, M. Gallinaro,J. Hollar, N. Leonardo, J. Seixas, K. Shchelina, G. Strong, O. Toldaiev, J. Varela
Joint Institute for Nuclear Research, Dubna, Russia
A. Baginyan, Y. Ershov, A. Golunov, I. Golutvin, I. Gorbunov, V. Karjavine, I. Kashunin,V. Korenkov, A. Lanev, A. Malakhov, V. Matveev , P. Moisenz, V. Palichik, V. Perelygin,M. Savina, S. Shmatov, S. Shulha, O. Teryaev, N. Voytishin, A. Zarubin
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
L. Chtchipounov, V. Golovtsov, Y. Ivanov, V. Kim , E. Kuznetsova , P. Levchenko, V. Murzin,V. Oreshkin, I. Smirnov, D. Sosnov, V. Sulimov, L. Uvarov, A. Vorobyev Institute for Nuclear Research, Moscow, Russia
Yu. Andreev, A. Dermenev, S. Gninenko, N. Golubev, A. Karneyeu, M. Kirsanov, N. Krasnikov,A. Pashenkov, D. Tlisov, A. Toropin
Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC‘Kurchatov Institute’, Moscow, Russia
V. Epshteyn, V. Gavrilov, N. Lychkovskaya, A. Nikitenko , V. Popov, I. Pozdnyakov,G. Safronov, A. Spiridonov, A. Stepennov, M. Toms, E. Vlasov, A. Zhokin Moscow Institute of Physics and Technology, Moscow, Russia
T. Aushev
National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI),Moscow, Russia
M. Chadeeva , P. Parygin, D. Philippov, E. Popova, V. Rusinov P.N. Lebedev Physical Institute, Moscow, Russia
V. Andreev, M. Azarkin, I. Dremin, M. Kirakosyan, A. Terkulov
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow,Russia
A. Baskakov, A. Belyaev, E. Boos, V. Bunichev, M. Dubinin , L. Dudko, A. Ershov, V. Klyukhin,O. Kodolova, I. Lokhtin, S. Obraztsov, V. Savrin, A. Snigirev Novosibirsk State University (NSU), Novosibirsk, Russia
A. Barnyakov , V. Blinov , T. Dimova , L. Kardapoltsev , Y. Skovpen Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’,Protvino, Russia
I. Azhgirey, I. Bayshev, S. Bitioukov, V. Kachanov, D. Konstantinov, P. Mandrik, V. Petrov,R. Ryutin, S. Slabospitskii, A. Sobol, S. Troshin, N. Tyurin, A. Uzunian, A. Volkov
National Research Tomsk Polytechnic University, Tomsk, Russia
A. Babaev, A. Iuzhakov, V. Okhotnikov
Tomsk State University, Tomsk, Russia
V. Borchsh, V. Ivanchenko, E. Tcherniaev
University of Belgrade: Faculty of Physics and VINCA Institute of Nuclear Sciences
P. Adzic , P. Cirkovic, D. Devetak, M. Dordevic, P. Milenovic, J. Milosevic, M. Stojanovic Centro de Investigaciones Energ´eticas Medioambientales y Tecnol ´ogicas (CIEMAT),Madrid, Spain
M. Aguilar-Benitez, J. Alcaraz Maestre, A. ´Alvarez Fern´andez, I. Bachiller, M. Barrio Luna,J.A. Brochero Cifuentes, C.A. Carrillo Montoya, M. Cepeda, M. Cerrada, N. Colino,B. De La Cruz, A. Delgado Peris, C. Fernandez Bedoya, J.P. Fern´andez Ramos, J. Flix, M.C. Fouz,O. Gonzalez Lopez, S. Goy Lopez, J.M. Hernandez, M.I. Josa, D. Moran, ´A. Navarro Tobar,A. P´erez-Calero Yzquierdo, J. Puerta Pelayo, I. Redondo, L. Romero, S. S´anchez Navas,M.S. Soares, A. Triossi, C. Willmott
Universidad Aut ´onoma de Madrid, Madrid, Spain
C. Albajar, J.F. de Troc ´oniz Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnolog´ıas Espaciales deAsturias (ICTEA), Oviedo, Spain
B. Alvarez Gonzalez, J. Cuevas, C. Erice, J. Fernandez Menendez, S. Folgueras, I. Gonzalez Ca-ballero, J.R. Gonz´alez Fern´andez, E. Palencia Cortezon, V. Rodr´ıguez Bouza, S. Sanchez Cruz
Instituto de F´ısica de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
I.J. Cabrillo, A. Calderon, B. Chazin Quero, J. Duarte Campderros, M. Fernandez,P.J. Fern´andez Manteca, A. Garc´ıa Alonso, G. Gomez, C. Martinez Rivero, P. Mar-tinez Ruiz del Arbol, F. Matorras, J. Piedra Gomez, C. Prieels, T. Rodrigo, A. Ruiz-Jimeno,L. Russo , L. Scodellaro, N. Trevisani, I. Vila, J.M. Vizan Garcia University of Colombo, Colombo, Sri Lanka
K. Malagalage
University of Ruhuna, Department of Physics, Matara, Sri Lanka
W.G.D. Dharmaratna, N. Wickramage
CERN, European Organization for Nuclear Research, Geneva, Switzerland
D. Abbaneo, B. Akgun, E. Auffray, G. Auzinger, J. Baechler, P. Baillon, A.H. Ball, D. Barney,J. Bendavid, M. Bianco, A. Bocci, E. Bossini, C. Botta, E. Brondolin, T. Camporesi, A. Caratelli,G. Cerminara, E. Chapon, G. Cucciati, D. d’Enterria, A. Dabrowski, N. Daci, V. Daponte,A. David, O. Davignon, A. De Roeck, N. Deelen, M. Deile, M. Dobson, M. D ¨unser,N. Dupont, A. Elliott-Peisert, F. Fallavollita , D. Fasanella, G. Franzoni, J. Fulcher, W. Funk,S. Giani, D. Gigi, A. Gilbert, K. Gill, F. Glege, M. Gruchala, M. Guilbaud, D. Gulhan,J. Hegeman, C. Heidegger, Y. Iiyama, V. Innocente, P. Janot, O. Karacheban , J. Kaspar,J. Kieseler, M. Krammer , C. Lange, P. Lecoq, C. Lourenc¸o, L. Malgeri, M. Mannelli,A. Massironi, F. Meijers, J.A. Merlin, S. Mersi, E. Meschi, F. Moortgat, M. Mulders, J. Ngadiuba,S. Nourbakhsh, S. Orfanelli, L. Orsini, F. Pantaleo , L. Pape, E. Perez, M. Peruzzi, A. Petrilli,G. Petrucciani, A. Pfeiffer, M. Pierini, F.M. Pitters, D. Rabady, A. Racz, M. Rovere, H. Sakulin,C. Sch¨afer, C. Schwick, M. Selvaggi, A. Sharma, P. Silva, W. Snoeys, P. Sphicas , J. Steggemann,V.R. Tavolaro, D. Treille, A. Tsirou, A. Vartak, M. Verzetti, W.D. Zeuner Paul Scherrer Institut, Villigen, Switzerland
L. Caminada , K. Deiters, W. Erdmann, R. Horisberger, Q. Ingram, H.C. Kaestli, D. Kotlinski,U. Langenegger, T. Rohe, S.A. Wiederkehr ETH Zurich - Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland
M. Backhaus, P. Berger, N. Chernyavskaya, G. Dissertori, M. Dittmar, M. Doneg`a, C. Dorfer,T.A. G ´omez Espinosa, C. Grab, D. Hits, T. Klijnsma, W. Lustermann, R.A. Manzoni,M. Marionneau, M.T. Meinhard, F. Micheli, P. Musella, F. Nessi-Tedaldi, F. Pauss, G. Perrin,L. Perrozzi, S. Pigazzini, M. Reichmann, C. Reissel, T. Reitenspiess, D. Ruini, D.A. Sanz Becerra,M. Sch ¨onenberger, L. Shchutska, M.L. Vesterbacka Olsson, R. Wallny, D.H. Zhu
Universit¨at Z ¨urich, Zurich, Switzerland
T.K. Aarrestad, C. Amsler , D. Brzhechko, M.F. Canelli, A. De Cosa, R. Del Burgo, S. Donato,B. Kilminster, S. Leontsinis, V.M. Mikuni, I. Neutelings, G. Rauco, P. Robmann, D. Salerno,K. Schweiger, C. Seitz, Y. Takahashi, S. Wertz, A. Zucchetta National Central University, Chung-Li, Taiwan
T.H. Doan, C.M. Kuo, W. Lin, A. Roy, S.S. Yu
National Taiwan University (NTU), Taipei, Taiwan
P. Chang, Y. Chao, K.F. Chen, P.H. Chen, W.-S. Hou, Y.y. Li, R.-S. Lu, E. Paganis, A. Psallidas,A. Steen Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand
B. Asavapibhop, C. Asawatangtrakuldee, N. Srimanobhas, N. Suwonjandee
C¸ ukurova University, Physics Department, Science and Art Faculty, Adana, Turkey
A. Bat, F. Boran, S. Cerci , S. Damarseckin , Z.S. Demiroglu, F. Dolek, C. Dozen,I. Dumanoglu, E. Eskut, G. Gokbulut, EmineGurpinar Guler , Y. Guler, I. Hos , C. Isik,E.E. Kangal , O. Kara, A. Kayis Topaksu, U. Kiminsu, M. Oglakci, G. Onengut, K. Ozdemir ,S. Ozturk , A.E. Simsek, U.G. Tok, S. Turkcapar, I.S. Zorbakir, C. Zorbilmez Middle East Technical University, Physics Department, Ankara, Turkey
B. Isildak , G. Karapinar , M. Yalvac Bogazici University, Istanbul, Turkey
I.O. Atakisi, E. G ¨ulmez, M. Kaya , O. Kaya , B. Kaynak, ¨O. ¨Ozc¸elik, S. Tekten, E.A. Yetkin Istanbul Technical University, Istanbul, Turkey
A. Cakir, K. Cankocak, Y. Komurcu, S. Sen Istanbul University, Istanbul, Turkey
S. Ozkorucuklu
Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov,Ukraine
B. Grynyov
National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine
L. Levchuk
University of Bristol, Bristol, United Kingdom
F. Ball, E. Bhal, S. Bologna, J.J. Brooke, D. Burns, E. Clement, D. Cussans, H. Flacher,J. Goldstein, G.P. Heath, H.F. Heath, L. Kreczko, S. Paramesvaran, B. Penning, T. Sakuma,S. Seif El Nasr-Storey, D. Smith, V.J. Smith, J. Taylor, A. Titterton
Rutherford Appleton Laboratory, Didcot, United Kingdom
K.W. Bell, A. Belyaev , C. Brew, R.M. Brown, D. Cieri, D.J.A. Cockerill, J.A. Coughlan,K. Harder, S. Harper, J. Linacre, K. Manolopoulos, D.M. Newbold, E. Olaiya, D. Petyt, T. Reis,T. Schuh, C.H. Shepherd-Themistocleous, A. Thea, I.R. Tomalin, T. Williams, W.J. Womersley Imperial College, London, United Kingdom
R. Bainbridge, P. Bloch, J. Borg, S. Breeze, O. Buchmuller, A. Bundock, GurpreetS-ingh CHAHAL , D. Colling, P. Dauncey, G. Davies, M. Della Negra, R. Di Maria, P. Everaerts,G. Hall, G. Iles, T. James, M. Komm, C. Laner, L. Lyons, A.-M. Magnan, S. Malik, A. Martelli,V. Milosevic, J. Nash , V. Palladino, M. Pesaresi, D.M. Raymond, A. Richards, A. Rose, E. Scott,C. Seez, A. Shtipliyski, M. Stoye, T. Strebler, S. Summers, A. Tapper, K. Uchida, T. Virdee ,N. Wardle, D. Winterbottom, J. Wright, A.G. Zecchinelli, S.C. Zenz Brunel University, Uxbridge, United Kingdom
J.E. Cole, P.R. Hobson, A. Khan, P. Kyberd, C.K. Mackay, A. Morton, I.D. Reid, L. Teodorescu,S. Zahid
Baylor University, Waco, USA
K. Call, J. Dittmann, K. Hatakeyama, C. Madrid, B. McMaster, N. Pastika, C. Smith
Catholic University of America, Washington, DC, USA
R. Bartek, A. Dominguez, R. Uniyal The University of Alabama, Tuscaloosa, USA
A. Buccilli, S.I. Cooper, C. Henderson, P. Rumerio, C. West
Boston University, Boston, USA
D. Arcaro, T. Bose, Z. Demiragli, D. Gastler, S. Girgis, D. Pinna, C. Richardson, J. Rohlf,D. Sperka, I. Suarez, L. Sulak, D. Zou
Brown University, Providence, USA
G. Benelli, B. Burkle, X. Coubez, D. Cutts, Y.t. Duh, M. Hadley, J. Hakala, U. Heintz,J.M. Hogan , K.H.M. Kwok, E. Laird, G. Landsberg, J. Lee, Z. Mao, M. Narain, S. Sagir ,R. Syarif, E. Usai, D. Yu University of California, Davis, Davis, USA
R. Band, C. Brainerd, R. Breedon, M. Calderon De La Barca Sanchez, M. Chertok, J. Conway,R. Conway, P.T. Cox, R. Erbacher, C. Flores, G. Funk, F. Jensen, W. Ko, O. Kukral, R. Lander,M. Mulhearn, D. Pellett, J. Pilot, M. Shi, D. Stolp, D. Taylor, K. Tos, M. Tripathi, Z. Wang,F. Zhang
University of California, Los Angeles, USA
M. Bachtis, C. Bravo, R. Cousins, A. Dasgupta, A. Florent, J. Hauser, M. Ignatenko, N. Mccoll,W.A. Nash, S. Regnard, D. Saltzberg, C. Schnaible, B. Stone, V. Valuev
University of California, Riverside, Riverside, USA
K. Burt, R. Clare, J.W. Gary, S.M.A. Ghiasi Shirazi, G. Hanson, G. Karapostoli, E. Kennedy,O.R. Long, M. Olmedo Negrete, M.I. Paneva, W. Si, L. Wang, H. Wei, S. Wimpenny, B.R. Yates,Y. Zhang
University of California, San Diego, La Jolla, USA
J.G. Branson, P. Chang, S. Cittolin, M. Derdzinski, R. Gerosa, D. Gilbert, B. Hashemi, D. Klein,V. Krutelyov, J. Letts, M. Masciovecchio, S. May, S. Padhi, M. Pieri, V. Sharma, M. Tadel,F. W ¨urthwein, A. Yagil, G. Zevi Della Porta
University of California, Santa Barbara - Department of Physics, Santa Barbara, USA
N. Amin, R. Bhandari, C. Campagnari, M. Citron, V. Dutta, M. Franco Sevilla, L. Gouskos,J. Incandela, B. Marsh, H. Mei, A. Ovcharova, H. Qu, J. Richman, U. Sarica, D. Stuart, S. Wang,J. Yoo
California Institute of Technology, Pasadena, USA
D. Anderson, A. Bornheim, O. Cerri, I. Dutta, J.M. Lawhorn, N. Lu, J. Mao, H.B. Newman,T.Q. Nguyen, J. Pata, M. Spiropulu, J.R. Vlimant, S. Xie, Z. Zhang, R.Y. Zhu
Carnegie Mellon University, Pittsburgh, USA
M.B. Andrews, T. Ferguson, T. Mudholkar, M. Paulini, M. Sun, I. Vorobiev, M. Weinberg
University of Colorado Boulder, Boulder, USA
J.P. Cumalat, W.T. Ford, A. Johnson, E. MacDonald, T. Mulholland, R. Patel, A. Perloff,K. Stenson, K.A. Ulmer, S.R. Wagner
Cornell University, Ithaca, USA
J. Alexander, J. Chaves, Y. Cheng, J. Chu, A. Datta, A. Frankenthal, K. Mcdermott, N. Mirman,J.R. Patterson, D. Quach, A. Rinkevicius , A. Ryd, S.M. Tan, Z. Tao, J. Thom, P. Wittich,M. Zientek Fermi National Accelerator Laboratory, Batavia, USA
S. Abdullin, M. Albrow, M. Alyari, G. Apollinari, A. Apresyan, A. Apyan, S. Banerjee, L.A.T. Bauerdick, A. Beretvas, J. Berryhill, P.C. Bhat, K. Burkett, J.N. Butler, A. Canepa,G.B. Cerati, H.W.K. Cheung, F. Chlebana, M. Cremonesi, J. Duarte, V.D. Elvira, J. Freeman,Z. Gecse, E. Gottschalk, L. Gray, D. Green, S. Gr ¨unendahl, O. Gutsche, AllisonReinsvold Hall,J. Hanlon, R.M. Harris, S. Hasegawa, R. Heller, J. Hirschauer, B. Jayatilaka, S. Jindariani,M. Johnson, U. Joshi, B. Klima, M.J. Kortelainen, B. Kreis, S. Lammel, J. Lewis, D. Lincoln,R. Lipton, M. Liu, T. Liu, J. Lykken, K. Maeshima, J.M. Marraffino, D. Mason, P. McBride,P. Merkel, S. Mrenna, S. Nahn, V. O’Dell, V. Papadimitriou, K. Pedro, C. Pena, G. Rakness,F. Ravera, L. Ristori, B. Schneider, E. Sexton-Kennedy, N. Smith, A. Soha, W.J. Spalding,L. Spiegel, S. Stoynev, J. Strait, N. Strobbe, L. Taylor, S. Tkaczyk, N.V. Tran, L. Uplegger,E.W. Vaandering, C. Vernieri, M. Verzocchi, R. Vidal, M. Wang, H.A. Weber
University of Florida, Gainesville, USA
D. Acosta, P. Avery, P. Bortignon, D. Bourilkov, A. Brinkerhoff, L. Cadamuro, A. Carnes,V. Cherepanov, D. Curry, F. Errico, R.D. Field, S.V. Gleyzer, B.M. Joshi, M. Kim, J. Konigsberg,A. Korytov, K.H. Lo, P. Ma, K. Matchev, N. Menendez, G. Mitselmakher, D. Rosenzweig, K. Shi,J. Wang, S. Wang, X. Zuo
Florida International University, Miami, USA
Y.R. Joshi
Florida State University, Tallahassee, USA
T. Adams, A. Askew, S. Hagopian, V. Hagopian, K.F. Johnson, R. Khurana, T. Kolberg,G. Martinez, T. Perry, H. Prosper, C. Schiber, R. Yohay, J. Zhang
Florida Institute of Technology, Melbourne, USA
M.M. Baarmand, V. Bhopatkar, M. Hohlmann, D. Noonan, M. Rahmani, M. Saunders,F. Yumiceva
University of Illinois at Chicago (UIC), Chicago, USA
M.R. Adams, L. Apanasevich, D. Berry, R.R. Betts, R. Cavanaugh, X. Chen, S. Dittmer,O. Evdokimov, C.E. Gerber, D.A. Hangal, D.J. Hofman, K. Jung, C. Mills, T. Roy, M.B. Tonjes,N. Varelas, H. Wang, X. Wang, Z. Wu
The University of Iowa, Iowa City, USA
M. Alhusseini, B. Bilki , W. Clarida, K. Dilsiz , S. Durgut, R.P. Gandrajula, M. Haytmyradov,V. Khristenko, O.K. K ¨oseyan, J.-P. Merlo, A. Mestvirishvili , A. Moeller, J. Nachtman,H. Ogul , Y. Onel, F. Ozok , A. Penzo, C. Snyder, E. Tiras, J. Wetzel Johns Hopkins University, Baltimore, USA
B. Blumenfeld, A. Cocoros, N. Eminizer, D. Fehling, L. Feng, A.V. Gritsan, W.T. Hung,P. Maksimovic, J. Roskes, M. Swartz, M. Xiao
The University of Kansas, Lawrence, USA
C. Baldenegro Barrera, P. Baringer, A. Bean, S. Boren, J. Bowen, A. Bylinkin, T. Isidori, S. Khalil,J. King, G. Krintiras, A. Kropivnitskaya, C. Lindsey, D. Majumder, W. Mcbrayer, N. Minafra,M. Murray, C. Rogan, C. Royon, S. Sanders, E. Schmitz, J.D. Tapia Takaki, Q. Wang, J. Williams,G. Wilson
Kansas State University, Manhattan, USA
S. Duric, A. Ivanov, K. Kaadze, D. Kim, Y. Maravin, D.R. Mendis, T. Mitchell, A. Modak,A. Mohammadi
Lawrence Livermore National Laboratory, Livermore, USA
F. Rebassoo, D. Wright University of Maryland, College Park, USA
A. Baden, O. Baron, A. Belloni, S.C. Eno, Y. Feng, N.J. Hadley, S. Jabeen, G.Y. Jeng, R.G. Kellogg,J. Kunkle, A.C. Mignerey, S. Nabili, F. Ricci-Tam, M. Seidel, Y.H. Shin, A. Skuja, S.C. Tonwar,K. Wong
Massachusetts Institute of Technology, Cambridge, USA
D. Abercrombie, B. Allen, A. Baty, R. Bi, S. Brandt, W. Busza, I.A. Cali, M. D’Alfonso,G. Gomez Ceballos, M. Goncharov, P. Harris, D. Hsu, M. Hu, M. Klute, D. Kovalskyi, Y.-J. Lee,P.D. Luckey, B. Maier, A.C. Marini, C. Mcginn, C. Mironov, S. Narayanan, X. Niu, C. Paus,D. Rankin, C. Roland, G. Roland, Z. Shi, G.S.F. Stephans, K. Sumorok, K. Tatar, D. Velicanu,J. Wang, T.W. Wang, B. Wyslouch
University of Minnesota, Minneapolis, USA
A.C. Benvenuti † , R.M. Chatterjee, A. Evans, S. Guts, P. Hansen, J. Hiltbrand, Sh. Jain, S. Kalafut,Y. Kubota, Z. Lesko, J. Mans, R. Rusack, M.A. Wadud University of Mississippi, Oxford, USA
J.G. Acosta, S. Oliveros
University of Nebraska-Lincoln, Lincoln, USA
K. Bloom, D.R. Claes, C. Fangmeier, L. Finco, F. Golf, R. Gonzalez Suarez, R. Kamalieddin,I. Kravchenko, J.E. Siado, G.R. Snow, B. Stieger
State University of New York at Buffalo, Buffalo, USA
G. Agarwal, C. Harrington, I. Iashvili, A. Kharchilava, C. Mclean, D. Nguyen, A. Parker,J. Pekkanen, S. Rappoccio, B. Roozbahani
Northeastern University, Boston, USA
G. Alverson, E. Barberis, C. Freer, Y. Haddad, A. Hortiangtham, G. Madigan, D.M. Morse,T. Orimoto, L. Skinnari, A. Tishelman-Charny, T. Wamorkar, B. Wang, A. Wisecarver, D. Wood
Northwestern University, Evanston, USA
S. Bhattacharya, J. Bueghly, T. Gunter, K.A. Hahn, N. Odell, M.H. Schmitt, K. Sung, M. Trovato,M. Velasco
University of Notre Dame, Notre Dame, USA
R. Bucci, N. Dev, R. Goldouzian, M. Hildreth, K. Hurtado Anampa, C. Jessop, D.J. Karmgard,K. Lannon, W. Li, N. Loukas, N. Marinelli, I. Mcalister, F. Meng, C. Mueller, Y. Musienko ,M. Planer, R. Ruchti, P. Siddireddy, G. Smith, S. Taroni, M. Wayne, A. Wightman, M. Wolf,A. Woodard The Ohio State University, Columbus, USA
J. Alimena, B. Bylsma, L.S. Durkin, S. Flowers, B. Francis, C. Hill, W. Ji, A. Lefeld, T.Y. Ling,B.L. Winer
Princeton University, Princeton, USA
S. Cooperstein, G. Dezoort, P. Elmer, J. Hardenbrook, N. Haubrich, S. Higginbotham,A. Kalogeropoulos, S. Kwan, D. Lange, M.T. Lucchini, J. Luo, D. Marlow, K. Mei, I. Ojalvo,J. Olsen, C. Palmer, P. Pirou´e, J. Salfeld-Nebgen, D. Stickland, C. Tully, Z. Wang
University of Puerto Rico, Mayaguez, USA
S. Malik, S. Norberg
Purdue University, West Lafayette, USA
A. Barker, V.E. Barnes, S. Das, L. Gutay, M. Jones, A.W. Jung, A. Khatiwada, B. Mahakud, D.H. Miller, G. Negro, N. Neumeister, C.C. Peng, S. Piperov, H. Qiu, J.F. Schulte, J. Sun, F. Wang,R. Xiao, W. Xie
Purdue University Northwest, Hammond, USA
T. Cheng, J. Dolen, N. Parashar
Rice University, Houston, USA
K.M. Ecklund, S. Freed, F.J.M. Geurts, M. Kilpatrick, Arun Kumar, W. Li, B.P. Padley, R. Redjimi,J. Roberts, J. Rorie, W. Shi, A.G. Stahl Leiton, Z. Tu, A. Zhang
University of Rochester, Rochester, USA
A. Bodek, P. de Barbaro, R. Demina, J.L. Dulemba, C. Fallon, T. Ferbel, M. Galanti, A. Garcia-Bellido, J. Han, O. Hindrichs, A. Khukhunaishvili, E. Ranken, P. Tan, R. Taus
Rutgers, The State University of New Jersey, Piscataway, USA
B. Chiarito, J.P. Chou, A. Gandrakota, Y. Gershtein, E. Halkiadakis, A. Hart, M. Heindl,E. Hughes, S. Kaplan, S. Kyriacou, I. Laflotte, A. Lath, R. Montalvo, K. Nash, M. Osherson,H. Saka, S. Salur, S. Schnetzer, D. Sheffield, S. Somalwar, R. Stone, S. Thomas, P. Thomassen
University of Tennessee, Knoxville, USA
H. Acharya, A.G. Delannoy, J. Heideman, G. Riley, S. Spanier
Texas A&M University, College Station, USA
O. Bouhali , A. Celik, M. Dalchenko, M. De Mattia, A. Delgado, S. Dildick, R. Eusebi,J. Gilmore, T. Huang, T. Kamon , S. Luo, D. Marley, R. Mueller, D. Overton, L. Perni`e,D. Rathjens, A. Safonov Texas Tech University, Lubbock, USA
N. Akchurin, J. Damgov, F. De Guio, S. Kunori, K. Lamichhane, S.W. Lee, T. Mengke,S. Muthumuni, T. Peltola, S. Undleeb, I. Volobouev, Z. Wang, A. Whitbeck
Vanderbilt University, Nashville, USA
S. Greene, A. Gurrola, R. Janjam, W. Johns, C. Maguire, A. Melo, H. Ni, K. Padeken, F. Romeo,P. Sheldon, S. Tuo, J. Velkovska, M. Verweij
University of Virginia, Charlottesville, USA
M.W. Arenton, P. Barria, B. Cox, G. Cummings, R. Hirosky, M. Joyce, A. Ledovskoy, C. Neu,B. Tannenwald, Y. Wang, E. Wolfe, F. Xia
Wayne State University, Detroit, USA
R. Harr, P.E. Karchin, N. Poudyal, J. Sturdy, P. Thapa, S. Zaleski
University of Wisconsin - Madison, Madison, WI, USA
J. Buchanan, C. Caillol, D. Carlsmith, S. Dasu, I. De Bruyn, L. Dodd, F. Fiori, C. Galloni,B. Gomber , M. Herndon, A. Herv´e, U. Hussain, P. Klabbers, A. Lanaro, A. Loeliger,K. Long, R. Loveless, J. Madhusudanan Sreekala, T. Ruggles, A. Savin, V. Sharma, W.H. Smith,D. Teague, S. Trembath-reichert, N. Woods † : Deceased1: Also at Vienna University of Technology, Vienna, Austria2: Also at IRFU, CEA, Universit´e Paris-Saclay, Gif-sur-Yvette, France3: Also at Universidade Estadual de Campinas, Campinas, Brazil4: Also at Federal University of Rio Grande do Sul, Porto Alegre, Brazil5: Also at UFMS, Nova Andradina, Brazil6: Also at Universidade Federal de Pelotas, Pelotas, Brazil
7: Also at Universit´e Libre de Bruxelles, Bruxelles, Belgium8: Also at University of Chinese Academy of Sciences, Beijing, China9: Also at Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC‘Kurchatov Institute’, Moscow, Russia10: Also at Joint Institute for Nuclear Research, Dubna, Russia11: Also at Suez University, Suez, Egypt12: Now at British University in Egypt, Cairo, Egypt13: Also at Purdue University, West Lafayette, USA14: Also at Universit´e de Haute Alsace, Mulhouse, France15: Also at Tbilisi State University, Tbilisi, Georgia16: Also at Erzincan Binali Yildirim University, Erzincan, Turkey17: Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland18: Also at RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany19: Also at University of Hamburg, Hamburg, Germany20: Also at Brandenburg University of Technology, Cottbus, Germany21: Also at Institute of Physics, University of Debrecen, Debrecen, Hungary, Debrecen,Hungary22: Also at Institute of Nuclear Research ATOMKI, Debrecen, Hungary23: Also at MTA-ELTE Lend ¨ulet CMS Particle and Nuclear Physics Group, E ¨otv ¨os Lor´andUniversity, Budapest, Hungary, Budapest, Hungary24: Also at IIT Bhubaneswar, Bhubaneswar, India, Bhubaneswar, India25: Also at Institute of Physics, Bhubaneswar, India26: Also at Shoolini University, Solan, India27: Also at University of Visva-Bharati, Santiniketan, India28: Also at Isfahan University of Technology, Isfahan, Iran29: Also at Italian National Agency for New Technologies, Energy and Sustainable EconomicDevelopment, Bologna, Italy30: Also at Centro Siciliano di Fisica Nucleare e di Struttura Della Materia, Catania, Italy31: Also at Scuola Normale e Sezione dell’INFN, Pisa, Italy32: Also at Riga Technical University, Riga, Latvia, Riga, Latvia33: Also at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia34: Also at Consejo Nacional de Ciencia y Tecnolog´ıa, Mexico City, Mexico35: Also at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland36: Also at Institute for Nuclear Research, Moscow, Russia37: Now at National Research Nuclear University ’Moscow Engineering Physics Institute’(MEPhI), Moscow, Russia38: Also at St. Petersburg State Polytechnical University, St. Petersburg, Russia39: Also at University of Florida, Gainesville, USA40: Also at Imperial College, London, United Kingdom41: Also at P.N. Lebedev Physical Institute, Moscow, Russia42: Also at California Institute of Technology, Pasadena, USA43: Also at Budker Institute of Nuclear Physics, Novosibirsk, Russia44: Also at Faculty of Physics, University of Belgrade, Belgrade, Serbia45: Also at Universit`a degli Studi di Siena, Siena, Italy46: Also at INFN Sezione di Pavia a , Universit`a di Pavia b , Pavia, Italy, Pavia, Italy47: Also at National and Kapodistrian University of Athens, Athens, Greece48: Also at Universit¨at Z ¨urich, Zurich, Switzerland49: Also at Stefan Meyer Institute for Subatomic Physics, Vienna, Austria, Vienna, Austria50: Also at Adiyaman University, Adiyaman, Turkey7