Observation of the Λ 0 b → J/ ψΛϕ decay in proton-proton collisions at s √ = 13 TeV
EEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN)
CERN-EP-2019-2242020/01/24
CMS-BPH-19-002
Observation of the Λ → J/ ψ Λ φ decay in proton-protoncollisions at √ s =
13 TeV
The CMS Collaboration ∗ Abstract
The observation of the Λ → J/ ψ Λ φ decay is reported using proton-proton collisiondata collected at √ s =
13 TeV by the CMS experiment at the LHC in 2018, corres-ponding to an integrated luminosity of 60 fb − . The ratio of the branching frac-tions B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) is measured to be ( ± ± ± ( B )) × − , where the first uncertainty is statistical, the second issystematic, and the last uncertainty reflects the uncertainties in the world-averagebranching fractions of φ and ψ ( ) decays to the reconstructed final states. ”Published in Physics Letters B as doi:10.1016/j.physletb.2020.135203 .” c (cid:13) ∗ See Appendix A for the list of collaboration members a r X i v : . [ h e p - e x ] J a n Studies of b baryon decays are of great importance for probing the dynamics of heavy-flavordecay processes. Since the observation of the lightest b baryon Λ by the UA1 Collaboration [1]at the CERN SppS, followed by extensive studies at the Fermilab Tevatron by the CDF [2–11]and D0 [12–17] Collaborations, the ATLAS, CMS, and LHCb experiments have accomplishednumerous Λ baryon studies, made possible by the large production cross section of bb pairsat the CERN LHC. Among these studies are precision mass measurements of the ground andexcited states [18, 19], as well as lifetime and polarization measurements [20–23]. Most of thesestudies have been performed in the Λ → J/ ψ Λ decay channel. Recently, an observation ofthe Λ baryon decay to an excited charmonium state Λ → ψ ( ) Λ has been reported by theATLAS Collaboration [24], while the LHCb Collaboration observed other, higher-multiplicitydecays involving charmonium states [25, 26]. Decays of the Λ baryon also proved to be a richsource of exotic spectroscopy, as has been demonstrated by the observation by LHCb [27, 28] ofnew pentaquark states P c ( ) + , P c ( ) + , and P c ( ) + in the invariant mass distributionof the J/ ψ p system produced in the Λ → J/ ψ pK − decay. Further studies of the Λ baryondecay modes involving charmonium states may shed light on the strong interaction processesin hadronic decays of b baryons and on the production of exotic multiquark states.This Letter reports the observation of the Λ → J/ ψ Λ φ decay mode and the measurementof the branching fraction ratio B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) , by the CMS experi-ment. Here and thereafter, φ refers to the φ ( ) meson. The J/ ψ , Λ , φ , and ψ ( ) candi-dates are reconstructed in µ + µ − , p π − , K + K − , and J/ ψπ + π − final states, respectively. The Λ → ψ ( ) Λ → J/ ψπ + π − p π − → µ + µ − π + π − p π − decay is used as the normalization chan-nel, owing to its similar decay topology.The branching fraction ratio B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) is measured as: B ( Λ → J/ ψ Λ φ ) B ( Λ → ψ ( ) Λ ) = N ( Λ → J/ ψ Λ φ ) (cid:101) ( Λ → ψ ( ) Λ ) B ( ψ ( ) → J/ ψπ + π − ) N ( Λ → ψ ( ) Λ ) (cid:101) ( Λ → J/ ψ Λ φ ) B ( φ → K + K − ) , (1)where N ( Λ → J/ ψ Λ φ ) and N ( Λ → ψ ( ) Λ ) are the measured Λ yields for the signal andnormalization channels, respectively. The terms (cid:101) ( Λ → J/ ψ Λ φ ) and (cid:101) ( Λ → ψ ( ) Λ ) arethe respective overall efficiencies that include the detector acceptance and the reconstructionefficiency. The branching fractions B ( ψ ( ) → J/ ψπ + π − ) and B ( φ → K + K − ) are taken fromthe Particle Data Group (PDG) [29].The Λ → J/ ψ Λ φ decay is expected to proceed via the b → ccs process, similarly to the Λ → J/ ψ Λ decay, but requires an additional ss pair. Consequently, the measurement of itsbranching fraction could enhance the understanding of the final-state strong interactions in bbaryon decays and test heavy-quark effective theory [30]. In addition, the Λ → J/ ψ Λ φ decayis a baryonic analog of the B + → J/ ψφ K + decay, where a rich resonant structure in the J/ ψφ system has been observed by several experiments [31–34]. Therefore, detailed studies of theJ/ ψφ spectrum produced in baryonic decays may provide an important test for the productionof these states. Recently, the existence of a hidden-charm pentaquark spectra was predicted forthe J/ ψ Λ final state [35], which can be investigated in the Λ → J/ ψ Λ φ decay, once a sufficientnumber of signal events is accumulated. The central feature of the CMS apparatus [36] is a superconducting solenoid of 6 m internaldiameter, 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, and a brass and scintillatorhadron calorimeter, each composed of a barrel and two endcap sections. Forward calorimetersextend the pseudorapidity ( η ) coverage provided by the barrel and endcap detectors. Muonsare detected in gas-ionization chambers embedded in the steel flux-return yoke outside thesolenoid. The main subdetectors used for the present analysis are the silicon tracker and themuon system.The silicon tracker measures charged particles within the range | η | < < p T <
10 GeV and | η | < p T .Muons are measured within | η | < p T resolution is measured tobe in the range 0.8–3.0% for muons with p T <
10 GeV used in this analysis, depending on themuon | η | [37].Events of interest are selected using a two-tiered trigger system [38]. The first level (L1), com-posed of custom hardware processors, uses information from the calorimeters and muon de-tectors to select events at a rate up to 100 kHz within a fixed time interval of less than 4 µ s. Thesecond level, known as the high-level trigger (HLT), consists of a farm of processors running aversion of the full event reconstruction software optimized for fast processing, and reduces theevent rate to around 1 kHz before data storage.A more detailed description of the CMS detector, together with a definition of the coordinatesystem used and the relevant kinematic variables, can be found in Ref. [36]. The analysis described in this Letter is based on a data sample of proton-proton collisions at acenter-of-mass energy of 13 TeV, collected with the CMS detector in 2018 and corresponding toan integrated luminosity of 60 fb − .Data were recorded with a dedicated trigger, optimized for the selection of b hadrons decay-ing to J/ ψ ( µ + µ − ) and two additional tracks from the charged hadrons emerging from the de-cay. The L1 trigger requires two oppositely charged muons with p T of at least 4 GeV, or twomuons in the barrel region ( | η | < p T threshold. At the HLT, a J/ ψ candi-date decaying into a µ + µ − pair displaced from the interaction point is required, along with atleast two tracks consistent with the displaced vertex. Each muon p T is required to be at least4 GeV, while the dimuon p T is required to exceed 6.9 GeV. The J/ ψ candidates reconstructedfrom dimuons are required to have an invariant mass between 2.9 and 3.3 GeV. The three-dimensional distance of closest approach of the two muons to each other is required to be lessthan 0.5 cm. The fitted dimuon vertex is required to have a transverse decay length signifi-cance L xy ( J/ ψ ) / σ L xy ( J/ ψ ) >
3, where L xy ( J/ ψ ) and σ L xy ( J/ ψ ) are, respectively, the distance fromthe common vertex to the beam axis in the transverse plane and its uncertainty. Finally, thedimuon vertex fit probability, calculated using the χ and the number of degrees of freedomof the fit, is required to exceed 10%, while the angle α between the dimuon p T vector and thedirection connecting the beam axis and the dimuon vertex in the transverse plane is requiredto satisfy cos α > tracks are assigned a kaon mass hypothesis and required to have p T > | η | < p T thresholdon the two muon candidates of 4 GeV and the requirement of | η | < ψ meson mass M PDGJ/ ψ are selected (hereafter, M PDGX denotes the world-averagemass of hadron X [29]), and the p T of the J/ ψ meson is required to exceed 7 GeV.To reconstruct a Λ candidate, the J/ ψ candidate is combined with two oppositely charged,high-purity [40] tracks, assumed to be kaon candidates, and a Λ candidate. The p T of thetracks is required to exceed 0.8 GeV, and their invariant mass must satisfy 0.99 < M ( K + K − ) < Λ candidates are formed from displaced two-prong vertices under the assump-tion of the Λ → p π − decay, as described in Ref. [41]. Daughter particles of the Λ candidateare refitted to a common vertex with their invariant mass constrained to M PDG Λ , and the vertexfit probability is required to exceed 1%. The proton mass is assigned to the higher-momentumdaughter track. To select the candidates in the Λ signal region, the following additional re-quirement is applied: | M ( p π − ) − M PDG Λ | < Λ candidates.In addition, the Λ candidate is required to have a transverse momentum in excess of 1 GeV.As the last step of the reconstruction, a fit to the common vertex of the Λ candidate, the twokaon tracks, and the dimuon pair is performed, with the dimuon mass constrained to M PDGJ/ ψ ;this vertex is referred to as the Λ vertex. The kinematic vertex fit probability of the Λ candi-date is required to exceed 1%. The selected candidates are required to have p T ( Λ ) >
10 GeV.Multiple proton-proton interactions in the same or nearby beam crossing (pileup) are presentin the data, with an average multiplicity of 32, resulting in multiple reconstructed verticesin an event. The vertex with the lowest three-dimensional angle between the line connect-ing this vertex with the Λ vertex and the Λ candidate momentum is chosen as the primaryvertex (PV). The following requirement is used to select Λ candidates consistent with orig-inating from the PV: cos α ( Λ , PV ) > α ( Λ , PV ) is the two-dimensional angle inthe transverse plane between the Λ candidate momentum and the vector pointing from thePV to the Λ vertex. The following requirement on the Λ vertex displacement is also applied: L xy ( Λ ) / σ L xy ( Λ ) >
3, where L xy ( Λ ) is the distance between the primary and Λ vertices inthe transverse plane, and σ L xy ( Λ ) is its uncertainty.Candidate decays for the normalization channel Λ → ψ ( ) Λ , with ψ ( ) → J/ ψπ + π − ,are selected using the same reconstruction chain. Identical requirements are used to select theJ/ ψ candidate, π + and π − tracks, and Λ candidate. An additional requirement is placed onthe J/ ψπ + π − invariant mass, | M ( J/ ψπ + π − ) − M PDG ψ ( ) | <
15 MeV, to select ψ ( ) candidates,where this window corresponds to approximately three effective widths of a reconstructed ψ ( ) candidate.In case of multiple Λ candidates per event, the one with the highest vertex fit probabilityis chosen for both the signal and normalization channels. There are 18.9 and 7.4% of eventswith two or more reconstructed candidates for signal and normalization channels, respectively.When there are two or more candidates in an event, the MC simulation predicts that the correct candidate is chosen 84 ± ±
13% of the time for the signal and normalization channels,respectively.To calculate the reconstruction efficiency, a study based on simulated signal events for bothchannels is performed. The events are generated with
PYTHIA Λ baryon decaysare modeled with EVTGEN [43] v1.6.0 for both the Λ → J/ ψ Λ φ and Λ → ψ ( ) Λ decaychannels, following the three-body phase space model. The events are then passed through adetailed CMS detector simulation based on G EANT
The invariant mass distribution of the Λ → J/ ψ Λ K + K − candidates selected using the strategydescribed in the previous section is shown in Fig. 1 (left). An unbinned, extended maximum-likelihood fit to a signal plus background hypothesis is performed on this observable and fur-ther mass distributions.The signal is described by a double-Gaussian function with a floating common mean and totalnormalization, while the two widths and the relative fraction of the two Gaussian functionsare fixed to the values obtained from simulation. The double-Gaussian function was chosenas a model that provides the best description of the simulated sample. The background isparameterized by a third-order Bernstein polynomial. The fit results in a signal yield of 380 ± Λ peak. The local significance of the excess is estimatedto be less than three standard deviations. Several cross-checks have been performed to investi-gate this enhancement. The M ( Λ → J/ ψ Λ K + K − ) distribution with the requirement on the φ candidates to have a mass within 10 MeV of the nominal value shows no significant excess inthis bin. The statistical significance of the Λ signal is 10.3 standard deviations in the asymp-totic approximation. A statistically independent data set, collected in 2017, has been examinedwith the same selection, and no significant excess below the Λ peak was observed. As a resultof these cross-checks, we attribute the excess to a statistical fluctuation.An unbinned likelihood fit to the M ( Λ → J/ ψ Λ K + K − ) observable is employed to separatethe signal and background components statistically, which is then used with the sPlot tech-nique [46] to obtain the M ( K + K − ) data distribution corresponding to signal Λ → J/ ψ Λ K + K − decays. To extract the Λ → J/ ψ Λ φ decay yield, the background-subtracted M ( K + K − ) distri-bution is fitted with the convolution of a double-Gaussian and relativistic Breit–Wigner func-tions for the φ signal and a first-order Bernstein polynomial for the nonresonant component.The natural width of the φ meson is fixed to the world-average value [29]. It was checkedthat the natural width of the φ meson obtained from the fit when it was allowed to float wasconsistent with the world-average value within the uncertainties. Both widths and the relativefraction of the two Gaussians are fixed to the values obtained from fitting the simulated sig-nal sample. The fit results in a signal yield of 286 ±
29 events. The M ( K + K − ) invariant massdistribution, along with the result of the fit, are shown in Fig. 1 (right).Figure 2 displays the invariant mass distribution of Λ → ψ ( ) Λ candidates. The points ) [GeV] - K + K Ly M(J/ E v en t s / M e V DataFitSignalBackground (13 TeV) -1
60 fb
CMS ) [GeV] - K + M(K Y i e l d / M e V DataFit signal f component f Non- (13 TeV) -1
60 fb
CMS
Figure 1: The invariant mass distributions of (left) J/ ψ Λ K + K − and (right) background-subtracted K + K − . The points are the data, with the vertical bars giving the statistical uncer-tainties, and the lines show the results of the fits described in the text.represent the data and the curve is the result of the fit. The signal is described by a double-Gaussian function with floating common mean and total normalization, while the individualwidths and the relative fraction of the two Gaussians are fixed from the fit to a simulated signalsample. The background is described by a third-order Bernstein polynomial function. The fitresults in a signal yield of 884 ±
37 events. The non- ψ ( ) contribution in the Λ → J/ ψπ + π − Λ signal was estimated to be negligible in the selected mass window | M ( J/ ψπ + π − ) − M PDG ψ ( ) | <
15 MeV. ) [GeV] L (2S) y M( E v en t s / M e V DataFitSignalBackground (13 TeV) -1
60 fb
CMS
Figure 2: The invariant mass distribution of Λ → ψ ( ) Λ candidates. The points are the dataand the lines give the result of the fit described in the text. The Λ selection efficiencies in the signal and normalization channels are calculated as theratio of the numbers of selected to generated events in simulated signal samples. The over-all efficiency includes the trigger and reconstruction efficiencies and the detector acceptance.The efficiency in each channel is obtained using the simulated samples described in Section 3.The efficiency ratio, which is used in the branching fraction ratio measurement, is found to be (cid:101) ( Λ → ψ ( ) Λ ) / (cid:101) ( Λ → J/ ψ Λ φ ) = ± p T spectrum of pions from the ψ ( ) → J/ ψπ + π − decay in the normalizations channel is softerthan the p T spectrum of kaons from the φ → K + K − decay in the signal channel, resulting in anefficiency ratio significantly below unity. In this section we discuss various sources of systematic uncertainty contributing to the mea-surement of the ratio B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) , as defined in Eq. (1).Since both the Λ → J/ ψ Λ φ → µ + µ − p π − K + K − and Λ → ψ ( ) Λ → µ + µ − p π − π + π − decay modes have the same topology, the systematic uncertainties related to the muon andtrack reconstruction, as well as the trigger efficiency, mostly cancel in the ratio. To test thisassumption, simulated samples were compared with background-subtracted data in a numberof kinematic distributions. As a result of these studies, an additional systematic uncertainty isassigned to account for the observed difference between data and simulation in the Λ rapiditydistribution for the normalization channel, as well as for the difference in the two-body invari-ant mass distributions M ( J/ ψ Λ ) , M ( J/ ψφ ) , and M ( Λ φ ) in data and simulation for the signalchannel. The latter discrepancy could be caused by a deviation from the pure phase spacedecay model used in the simulation due to contributions from intermediate resonant states;however, the statistical power of the present data set is insufficient to perform a more detailedinvestigation. To estimate this systematic uncertainty, the simulated samples were reweightedto match the distributions observed in data. The difference in the efficiency ratio before andafter the reweighting is taken as the corresponding systematic uncertainty.The systematic uncertainty related to the choice of the background model is estimated sepa-rately for the signal channel, normalization channel, and φ → K + K − decays. The variationof the background model includes Bernstein polynomials of second and fourth orders, in-dependently for the signal and normalization channels, and an exponential function for thebackground in the φ → K + K − invariant mass distribution. For the signal channel, an addi-tional background function with a threshold behavior is also tested: ( x − x ) β multiplied bythe Bernstein polynomials of first and second orders, where x = M PDGJ/ ψ + M PDG Λ + M PDG φ andthe exponent β is allowed to vary freely in the fit. In each case, the maximum deviation in themeasured signal yield within the variations of the background model is used as the systematicuncertainty.Another source of systematic uncertainty is the signal shape modeling in the M ( J/ ψ Λ K + K − ) , M ( ψ ( ) Λ ) , and M ( K + K − ) distributions. This uncertainty is estimated by using alternativesignal models whose parameters were obtained by fitting the simulated invariant mass dis-tributions. The variation of signal models includes a triple-Gaussian function and a sum oftwo Crystal Ball [47] functions for the Λ → J/ ψ Λ K + K − invariant mass distribution; a sum oftwo Crystal Ball functions for the Λ → ψ ( ) Λ channel; and a convolution of a double Crys-tal Ball [48] and relativistic Breit–Wigner functions for the M ( K + K − ) distribution. For eachof the variations, the largest deviation in the measured signal yield is taken as the systematicuncertainty.The next source of systematic uncertainty is the difference in the mass resolution of the Λ and φ peaks between data and simulation. To estimate this uncertainty, several variations wereapplied to the resolution functions in the M ( J/ ψ Λ K + K − ) and M ( ψ ( ) Λ ) distributions: onlythe ratio of the two Gaussian widths was fixed to the one measured in simulation instead offixing both widths, as in the nominal fit. For the M ( K + K − ) distribution, a fit with the fixedratios of the two Gaussian widths and yields, as measured in simulation, is performed. In eachcase, the maximum variation in the measured Λ yield is used as the systematic uncertainty.The difference between data and simulation in the measured Λ mass resolution for the Λ → J/ ψ Λ K + K − channel results in the largest systematic uncertainty.The statistical uncertainty in the efficiency ratio obtained from simulation is also considered as a source of systematic uncertainty. Table 1 summarizes the individual sources of the systematicuncertainty, as well as the overall uncertainty obtained as a quadratic sum of the individualcomponents.Table 1: Summary of the relative systematic uncertainties in B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) . Source Relativeuncertainty (%)Data/simulation difference in the Λ rapidity and two-body mass distributions 0.1Background model in the M ( J/ ψ Λ K + K − ) distribution 0.6Background model in the M ( ψ ( ) Λ ) distribution 0.8Background model in the M ( K + K − ) distribution 0.8Signal model in the M ( J/ ψ Λ K + K − ) distribution 0.8Signal model in the M ( ψ ( ) Λ ) distribution 1.1Signal model in the M ( K + K − ) distribution 0.5Data/simulation difference in the Λ resolution for the Λ → J/ ψ Λ φ decay 6.6Data/simulation difference in the Λ resolution for the Λ → ψ ( ) Λ decay 3.1Data/simulation difference in the φ resolution 1.4Finite size of simulated samples 2.9Total systematic uncertainty 8.2 Using Eq. (1), the signal and normalization channel yields N ( Λ → J/ ψ Λ φ ) = ±
29 and N ( Λ → ψ ( ) Λ ) = ±
37, the efficiency ratio described in Section 5, and the PDG valuesof B ( ψ ( ) → J/ ψπ + π − ) = ± B ( φ → K + K − ) = ± B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) to be ( ± ± ± ( B )) × − . The first uncertainty is statistical, while the second is systematic (as described in Sec-tion 6), and the third is due to the uncertainties in the branching fractions of the decays in-volved. The observation of the Λ → J/ ψ Λ φ decay and the measurement of the branching fractionratio B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) is presented using a data sample of proton-protoncollisions at √ s =
13 TeV collected in 2018 by the CMS experiment and corresponding to anintegrated luminosity of 60 fb − . The ratio B ( Λ → J/ ψ Λ φ ) / B ( Λ → ψ ( ) Λ ) is measuredto be ( ± ± ± ( B )) × − , where the first uncertainty is statistical,the second is systematic, and the last uncertainty reflects the uncertainties in the world-averagebranching fractions of φ and ψ ( ) decays to the reconstructed final states. The observation ofthe Λ → J/ ψ Λ φ decay opens a window on future searches for new resonances in the J/ ψ Λ and J/ ψφ mass spectra, once a sufficient number of signal events is observed. 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 CMS institutes 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);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 Foundation;the Belgian Federal Science Policy Office; the Fonds pour la Formation `a la Recherche dansl’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Weten-schap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the “Excel-lence of Science – EOS” – be.h project n. 30820817; the Beijing Municipal Science & TechnologyCommission, No. Z181100004218003; the Ministry of Education, Youth and Sports (MEYS)of the Czech Republic; the Lend ¨ulet (“Momentum”) Program and the J´anos Bolyai ResearchScholarship of the Hungarian Academy of Sciences, 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 Industrial Research, India; the HOMINGPLUS program of the Foundation for Polish Science, cofinanced from European Union, Re-gional Development Fund, the Mobility Plus program of the Ministry of Science and HigherEducation, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428,Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonata-bis2012/07/E/ST2/01406; the National Priorities Research Program by Qatar National ResearchFund; the Ministry of Science and Education, grant no. 3.2989.2017 (Russia); the Programa Es-tatal de Fomento de la Investigaci ´on Cient´ıfica y T´ecnica de Excelencia Mar´ıa de Maeztu, grantMDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Thalis andAristeia programs cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fundfor Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic intoIts 2nd Century Project Advancement Project (Thailand); the Nvidia Corporation; the WelchFoundation, 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, 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, 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, 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, Q. Python, K. Skovpen, S. Tavernier, W. Van Doninck,P. Van Mulders
Universit´e Libre de Bruxelles, Bruxelles, Belgium
D. Beghin, B. Bilin, B. Clerbaux, G. De Lentdecker, H. Delannoy, B. Dorney, L. Favart,A. Grebenyuk, A.K. Kalsi, A. Popov, N. Postiau, E. Starling, L. Thomas, C. Vander Velde,P. Vanlaer, D. Vannerom
Ghent University, Ghent, Belgium
T. Cornelis, D. Dobur, I. Khvastunov , M. Niedziela, C. Roskas, M. Tytgat, W. Verbeke,B. Vermassen, M. Vit 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,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 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, 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 Institute of High Energy Physics, Beijing, China
G.M. Chen, H.S. Chen, M. Chen, C.H. Jiang, D. Leggat, H. Liao, Z. Liu, 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, Q. Wang
Tsinghua University, Beijing, China
M. Ahmad, Z. Hu, Y. Wang
Zhejiang University, Hangzhou, China
M. Xiao
Universidad de Los Andes, Bogota, Colombia
C. Avila, A. Cabrera, C. Florez, C.F. Gonz´alez Hern´andez, M.A. Segura 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, 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, V. Karim¨aki, M.S. Kim, 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, B. Lenzi, E. Locci,J. Malcles, J. Rander, A. Rosowsky, M. ¨O. Sahin, A. Savoy-Navarro , M. Titov, G.B. Yu Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechniquede Paris
S. Ahuja, C. Amendola, F. Beaudette, P. Busson, C. Charlot, B. Diab, G. Falmagne,R. Granier de Cassagnac, 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, A. Carle, 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, A. Lesauvage, M. Lethuillier, L. Mirabito, S. Perries, V. Sordini,L. Torterotot, 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, K. Klein, M. Lipinski, D. Meuser, A. Pauls, M. Preuten, M.P. Rauch,J. Schulz, M. Teroerde, B. Wittmer
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
M. Erdmann, B. 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, J. Roemer, A. Schmidt,S.C. Schuler, A. Sharma, S. Wiedenbeck, S. Zaleski
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
G. Fl ¨ugge, W. Haj Ahmad , O. Hlushchenko, T. Kress, T. M ¨uller, 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,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, 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. Lidrych, K. Lipka, W. Lohmann ,R. Mankel, I.-A. Melzer-Pellmann, A.B. Meyer, M. Meyer, M. Missiroli, 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, 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, F. Feindt,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, J. Multhaup, C.E.N. Niemeyer, A. Perieanu, A. Reimers, O. Rieger,C. Scharf, P. Schleper, S. Schumann, J. Schwandt, J. Sonneveld, H. Stadie, G. Steinbr ¨uck,F.M. Stober, 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, D. M ¨uller,Th. M ¨uller, M. Musich, A. N ¨urnberg, G. Quast, K. Rabbertz, M. Schr ¨oder, I. Shvetsov,H.J. Simonis, R. Ulrich, M. Wassmer, 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. Manousakis-katsikakis, A. Panagiotou,I. Papavergou, N. Saoulidou, A. Stakia, K. Theofilatos, K. Vellidis, E. Vourliotis
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 , R. Chudasama, 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.. V´ami, V. Veszpremi, G. Vesztergombi † Institute of Nuclear Research ATOMKI, Debrecen, Hungary
N. Beni, S. Czellar, J. Karancsi , 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, 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. Dutta, S. Ghosh, B. Gomber , 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
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. Dube, B. Kansal, 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 , R. Aly a , b ,30 , 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 , W. Elmetenawee 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 , J.A. Merlin, 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 ,F.M. Simone a , b , 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 a , b , P. Giacomelli a ,C. Grandi a , L. Guiducci a , b , F. Iemmi a , b , S. Lo Meo a ,31 , 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 ,32 , S. Costa a , b , A. Di Mattia a , R. Potenza a , b , A. Tricomi a , b ,32 , C. Tuve a , b INFN Sezione di Firenze a , Universit`a di Firenze b , Firenze, Italy G. Barbagli a , A. Cassese, R. Ceccarelli, V. Ciulli a , b , C. Civinini a , R. D’Alessandro a , b , F. Fiori a , c ,E. Focardi a , b , G. Latino a , b , P. Lenzi a , b , M. Meschini a , S. Paoletti a , G. Sguazzoni 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 , M.E. Dinardo a , b , P. Dini a , 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 , M. Paganoni a , b , D. Pedrini a , S. Ragazzi a , b , T. Tabarelli de Fatis a , b , D. Valsecchi 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 a , b , 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 a , b , S. Lacaprara a , 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 a , 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 , D. Fiorina a , b , 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 , P. Vitulo a , b INFN Sezione di Perugia a , Universit`a di Perugia b , Perugia, Italy M. Biasini a , b , G.M. Bilei a , 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 , S. Donato a , G. Fedi a , L. Giannini a , c , A. Giassi a , M.T. Grippo a ,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 a9
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 , M.E. Dinardo a , b , P. Dini a , 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 , M. Paganoni a , b , D. Pedrini a , S. Ragazzi a , b , T. Tabarelli de Fatis a , b , D. Valsecchi 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 a , b , 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 a , b , S. Lacaprara a , 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 a , 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 , D. Fiorina a , b , 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 , P. Vitulo a , b INFN Sezione di Perugia a , Universit`a di Perugia b , Perugia, Italy M. Biasini a , b , G.M. Bilei a , 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 , S. Donato a , G. Fedi a , L. Giannini a , c , A. Giassi a , M.T. Grippo a ,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 a9 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 , M. Diemoz a , E. Longo 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 ,A. Bellora, 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 , F. Legger, 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 , G. Ortona 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. Salvatico a , b , V. Sola a ,A. Solano a , b , D. Soldi a , b , A. Staiano a , D. Trocino a , b 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, 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, S. Ha, B. Hong, K. Lee, K.S. Lee, J. Lim, J. Park, S.K. Park, Y. Roh, J. Yoo
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
University of Seoul, Seoul, Korea
D. Jeon, J.H. Kim, J.S.H. Lee, I.C. Park, I.J 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, A. Rinkevicius, 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
J. Mijuskovic , 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. Olszewski, 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, T. Niknejad, J. Seixas, K. Shchelina, G. Strong, O. Toldaiev, J. Varela
Joint Institute for Nuclear Research, Dubna, Russia
S. Afanasiev, P. Bunin, M. Gavrilenko, I. Golutvin, I. Gorbunov, A. Kamenev, V. Karjavine,A. Lanev, A. Malakhov, V. Matveev , P. Moisenz, V. Palichik, V. Perelygin, M. Savina,S. Shmatov, S. Shulha, N. Skatchkov, V. Smirnov, N. Voytishin, A. Zarubin
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
L. Chtchipounov, V. Golovtcov, 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, N. Petrov
National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI),Moscow, Russia
O. Bychkova, R. Chistov , M. Danilov , A. Nigamova, S. Polikarpov , E. Tarkovskii 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. Belyaev, E. Boos, M. Dubinin , L. Dudko, A. Ershov, A. Gribushin, V. Klyukhin,O. Kodolova, I. Lokhtin, S. Obraztsov, S. Petrushanko, 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, 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. lvarez Fern´andez, I. Bachiller, M. Barrio Luna,CristinaF. Bedoya, J.A. Brochero Cifuentes, C.A. Carrillo Montoya, M. Cepeda, M. Cerrada,N. Colino, B. De La Cruz, A. Delgado Peris, J.P. Fern´andez Ramos, J. Flix, M.C. Fouz,O. Gonzalez Lopez, S. Goy Lopez, J.M. Hernandez, M.I. Josa, D. Moran, . 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, R. Reyes-Almanza
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, 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, P. Bortignon, E. Bossini, 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, M. Deile, M. Dobson, M. D ¨unser,N. Dupont, A. Elliott-Peisert, N. Emriskova, F. Fallavollita , D. Fasanella, S. Fiorendi,G. Franzoni, J. Fulcher, W. Funk, S. Giani, D. Gigi, K. Gill, F. Glege, L. Gouskos, M. Gruchala,M. Guilbaud, D. Gulhan, J. Hegeman, C. Heidegger, Y. Iiyama, V. Innocente, T. James, P. Janot,O. Karacheban , J. Kaspar, J. Kieseler, M. Krammer , N. Kratochwil, C. Lange, P. Lecoq,C. Lourenc¸o, L. Malgeri, M. Mannelli, A. Massironi, F. Meijers, S. Mersi, E. Meschi, F. Moortgat,M. Mulders, J. Ngadiuba, J. Niedziela, 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. Rieger, M. Rovere, H. Sakulin, J. Salfeld-Nebgen, C. Sch¨afer, C. Schwick,M. Selvaggi, A. Sharma, P. Silva, W. Snoeys, P. Sphicas , J. Steggemann, S. Summers,V.R. Tavolaro, D. Treille, A. Tsirou, G.P. Van Onsem, 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, W. Lustermann, R.A. Manzoni, M.T. Meinhard,F. Micheli, P. Musella, F. Nessi-Tedaldi, F. Pauss, G. Perrin, L. Perrozzi, S. Pigazzini,M.G. Ratti, M. Reichmann, C. Reissel, T. Reitenspiess, B. Ristic, 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 , C. Botta, D. Brzhechko, M.F. Canelli, A. De Cosa, R. Del Burgo,B. Kilminster, S. Leontsinis, V.M. Mikuni, I. Neutelings, G. Rauco, P. Robmann, 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 ukurova University, Physics Department, Science and Art Faculty, Adana, Turkey
A. Bat, F. Boran, A. Celik , S. Damarseckin , Z.S. Demiroglu, F. Dolek, C. Dozen , I. Dumanoglu, G. Gokbulut, EmineGurpinar Guler , Y. Guler, I. Hos , C. Isik, E.E. Kangal ,O. Kara, A. Kayis Topaksu, U. Kiminsu, 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 , ¨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. Cerci , B. Kaynak, S. Ozkorucuklu, D. Sunar Cerci 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
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, B. Krikler, S. Paramesvaran, B. Penning, T. Sakuma,S. Seif El Nasr-Storey, V.J. Smith, J. Taylor, A. Titterton Rutherford Appleton Laboratory, Didcot, United Kingdom
K.W. Bell, A. Belyaev , C. Brew, R.M. Brown, 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 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, M. Komm, L. Lyons, A.-M. Magnan, S. Malik, A. Martelli, V. Milosevic,A. Morton, J. Nash , V. Palladino, M. Pesaresi, D.M. Raymond, A. Richards, A. Rose, E. Scott,C. Seez, A. Shtipliyski, M. Stoye, T. Strebler, A. Tapper, K. Uchida, T. Virdee , N. Wardle,D. Winterbottom, A.G. Zecchinelli, S.C. Zenz Brunel University, Uxbridge, United Kingdom
J.E. Cole, P.R. Hobson, A. Khan, P. Kyberd, C.K. Mackay, I.D. Reid, L. Teodorescu, S. Zahid
Baylor University, Waco, USA
K. Call, B. Caraway, 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, A.M. Vargas Hernandez
The University of Alabama, Tuscaloosa, USA
A. Buccilli, S.I. Cooper, C. Henderson, P. Rumerio, C. West
Boston University, Boston, USA
A. Albert, D. Arcaro, Z. Demiragli, D. Gastler, C. Richardson, J. Rohlf, D. Sperka, D. Spitzbart,I. Suarez, L. Sulak, D. Zou Brown University, Providence, USA
G. Benelli, B. Burkle, X. Coubez , D. Cutts, Y.t. Duh, M. Hadley, U. Heintz, J.M. Hogan ,K.H.M. Kwok, E. Laird, G. Landsberg, K.T. Lau, J. Lee, M. Narain, S. Sagir , R. Syarif, E. Usai,W.Y. Wong, D. Yu, W. Zhang 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. 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, Y. Chen, R. Clare, J.W. Gary, S.M.A. Ghiasi Shirazi, G. Hanson, G. Karapostoli,O.R. Long, M. Olmedo Negrete, M.I. Paneva, W. Si, L. Wang, S. Wimpenny, B.R. Yates, Y. Zhang
University of California, San Diego, La Jolla, USA
J.G. Branson, P. Chang, S. Cittolin, S. Cooperstein, N. Deelen, 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, J. Incandela,B. Marsh, H. Mei, A. Ovcharova, H. Qu, J. Richman, U. Sarica, D. Stuart, S. Wang
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, E. MacDonald, T. Mulholland, R. Patel, A. Perloff, K. Stenson,K.A. Ulmer, S.R. Wagner
Cornell University, Ithaca, USA
J. Alexander, Y. Cheng, J. Chu, A. Datta, A. Frankenthal, K. Mcdermott, J.R. Patterson,D. Quach, 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, D. Berry, 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, J. Hanlon, R.M. Harris,S. Hasegawa, R. Heller, J. Hirschauer, B. Jayatilaka, S. Jindariani, M. Johnson, U. Joshi,T. Klijnsma, 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,A. Reinsvold Hall, 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, R. Vidal, M. Wang, H.A. Weber University of Florida, Gainesville, USA
D. Acosta, P. Avery, D. Bourilkov, A. Brinkerhoff, L. Cadamuro, V. Cherepanov, F. Errico,R.D. Field, S.V. Gleyzer, D. Guerrero, B.M. Joshi, M. Kim, J. Konigsberg, A. Korytov, K.H. Lo,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, M. Hohlmann, D. Noonan, M. Rahmani, M. Saunders, F. Yumiceva
University of Illinois at Chicago (UIC), Chicago, USA
M.R. Adams, L. Apanasevich, R.R. Betts, R. Cavanaugh, X. Chen, S. Dittmer, O. Evdokimov,C.E. Gerber, D.A. Hangal, D.J. Hofman, C. Mills, T. Roy, M.B. Tonjes, N. Varelas, J. Viinikainen,H. Wang, X. Wang, Z. Wu
The University of Iowa, Iowa City, USA
M. Alhusseini, B. Bilki , 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, A.V. Gritsan, W.T. Hung, S. Kyriacou, P. Maksimovic,J. Roskes, M. Swartz
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,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
R.M. Chatterjee, A. Evans, S. Guts † , P. Hansen, J. Hiltbrand, Sh. Jain, Y. Kubota, Z. Lesko,J. Mans, M. Revering, R. Rusack, R. Saradhy, N. Schroeder, M.A. Wadud University of Mississippi, Oxford, USA
J.G. Acosta, S. Oliveros
University of Nebraska-Lincoln, Lincoln, USA
K. Bloom, S. Chauhan, D.R. Claes, C. Fangmeier, L. Finco, F. Golf, R. Kamalieddin,I. Kravchenko, J.E. Siado, G.R. Snow † , B. Stieger, W. Tabb 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, B. Marzocchi,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, A. Gilbert, 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, Y. Musienko , 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, B. Francis, C. Hill, W. Ji, A. Lefeld, T.Y. Ling, B.L. Winer
Princeton University, Princeton, USA
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, D. Stickland, C. Tully
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, N. Trevisani,F. Wang, R. Xiao, W. Xie
Purdue University Northwest, Hammond, USA
T. Cheng, J. Dolen, N. Parashar
Rice University, Houston, USA
U. Behrens, S. Dildick, 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, O. Hindrichs, A. Khukhunaishvili, E. Ranken, 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, I. Laflotte, A. Lath, R. Montalvo, K. Nash, M. Osherson, H. Saka, S. Salur,S. Schnetzer, S. Somalwar, R. Stone, S. Thomas
University of Tennessee, Knoxville, USA
H. Acharya, A.G. Delannoy, S. Spanier
Texas A&M University, College Station, USA
O. Bouhali , M. Dalchenko, M. De Mattia, A. Delgado, R. Eusebi, J. Gilmore, T. Huang,T. Kamon , H. Kim, S. Luo, S. Malhotra, 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, V. Hegde, 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, J. Hakala, 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
University of Wisconsin - Madison, Madison, WI, USA
T. Bose, J. Buchanan, C. Caillol, D. Carlsmith, S. Dasu, I. De Bruyn, L. Dodd, C. Galloni,H. He, M. Herndon, A. Herv´e, U. Hussain, A. Lanaro, A. Loeliger, K. Long, R. Loveless,J. Madhusudanan Sreekala, D. Pinna, T. Ruggles, A. Savin, V. Sharma, W.H. Smith, D. Teague,S. Trembath-reichert † : 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, Brazil7: 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, Switzerland
18: 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 Hyderabad, Hyderabad, India28: Also at University of Visva-Bharati, Santiniketan, India29: Also at Isfahan University of Technology, Isfahan, Iran30: Now at INFN Sezione di Bari a , Universit`a di Bari b , Politecnico di Bari c , Bari, Italy31: Also at Italian National Agency for New Technologies, Energy and Sustainable EconomicDevelopment, Bologna, Italy32: Also at Centro Siciliano di Fisica Nucleare e di Struttura Della Materia, Catania, Italy33: Also at Scuola Normale e Sezione dell’INFN, Pisa, Italy34: Also at Riga Technical University, Riga, Latvia, Riga, Latvia35: Also at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia36: Also at Consejo Nacional de Ciencia y Tecnolog´ıa, Mexico City, Mexico37: Also at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland38: Also at Institute for Nuclear Research, Moscow, Russia39: Now at National Research Nuclear University ’Moscow Engineering Physics Institute’(MEPhI), Moscow, Russia40: Also at St. Petersburg State Polytechnical University, St. Petersburg, Russia41: Also at University of Florida, Gainesville, USA42: Also at Imperial College, London, United Kingdom43: Also at P.N. Lebedev Physical Institute, Moscow, Russia44: Also at California Institute of Technology, Pasadena, USA45: Also at Budker Institute of Nuclear Physics, Novosibirsk, Russia46: Also at Faculty of Physics, University of Belgrade, Belgrade, Serbia47: Also at Universit`a degli Studi di Siena, Siena, Italy48: Also at INFN Sezione di Pavia a , Universit`a di Pavia b , Pavia, Italy, Pavia, Italy49: Also at National and Kapodistrian University of Athens, Athens, Greece50: Also at Universit¨at Z ¨urich, Zurich, Switzerland51: Also at Stefan Meyer Institute for Subatomic Physics, Vienna, Austria, Vienna, Austria52: Also at Burdur Mehmet Akif Ersoy University, BURDUR, Turkey53: Also at S¸ ırnak University, Sirnak, Turkey54: Also at Tsinghua University, Beijing, China55: Also at Beykent University, Istanbul, Turkey, Istanbul, Turkey56: Also at Istanbul Aydin University, Istanbul, Turkey57: Also at Mersin University, Mersin, Turkey58: Also at Piri Reis University, Istanbul, Turkey59: Also at Gaziosmanpasa University, Tokat, Turkey60: Also at Ozyegin University, Istanbul, Turkey61: Also at Izmir Institute of Technology, Izmir, Turkey62: Also at Marmara University, Istanbul, Turkey9