Measurement of Z boson Production in Pb+Pb Collisions at sqrt(s_NN)=2.76 TeV with the ATLAS Detector
EEUROPEAN ORGANISATION FOR NUCLEAR RESEARCH (CERN)
CERN-PH-EP-2012-223
Submitted to: Phys. Rev. Lett.
Measurement of Z boson Production in Pb+Pb Collisions at √ s N N = 2 . TeV with the ATLAS Detector
The ATLAS Collaboration
Abstract
The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15 nb − of integrated luminosity obtained in the 2011 LHC Pb+Pb run at √ s NN =2.76 TeV . The Z bosons arereconstructed via di-electron and di-muon decay channels, with a background contamination of lessthan 3%. Results from the two channels are consistent and are combined. Within the statistical andsystematic uncertainties, the per-event Z boson yield is proportional to the number of binary collisionsestimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution of the Z bosonwith respect to the event plane is found to be consistent with zero. a r X i v : . [ h e p - e x ] O c t easurement of Z boson Production in Pb+Pb Collisions at √ s NN = 2 .
76 TeV withthe ATLAS Detector
ATLAS Collaboration
The ATLAS experiment has observed 1995 Z boson candidates in data corresponding to 0.15 nb − of integrated luminosity obtained in the 2011 LHC Pb+Pb run at √ s NN =2.76 TeV. The Z bosonsare reconstructed via di-electron and di-muon decay channels, with a background contamination ofless than 3%. Results from the two channels are consistent and are combined. Within the statisticaland systematic uncertainties, the per-event Z boson yield is proportional to the number of binarycollisions estimated by the Glauber model. The elliptic anisotropy of the azimuthal distribution ofthe Z boson with respect to the event plane is found to be consistent with zero.PACS numbers: 25.75.-q, 23.70.+j, 25.75.Cj, 25.75.Dw Extensive studies of heavy ion (HI) collisions carriedout by the experiments at the Relativistic Heavy Ion Col-lider (RHIC) at BNL, and the Large Hadron Collider(LHC) at CERN, have established that the hot and densematter produced in HI collisions causes a significant en-ergy loss on the energetic color-charge carriers propagat-ing through such a medium [1, 2]. An understandingof this phenomenon requires measuring the unmodifiedproduction rates of the particles before they lose energy.The best candidates to perform such measurements areparticles that do not interact via the strong force. ThePHENIX experiment at RHIC measured the properties ofphotons [3]. At the LHC, the CMS experiment reportedresults on photons and W bosons [4, 5]. The numberof these bosons was found to scale with the number ofincoherent nucelon-nucleon collisions. Both the ATLASand CMS collaborations have reported measurements of Z → µµ production at √ s NN =2.76 TeV [6, 7], whichshow, within a limited statistical precision, the samescaling behavior. This Letter presents a precise mea-surement of Z boson production in Pb+Pb collisions at √ s NN =2.76 TeV, using the di-electron and di-muon de-cay channels. The Z boson production rate is measuredas a function of centrality, rapidity ( y Z ), transverse mo-mentum ( p Z T ), and orientation with respect to the eventplane [8].The ATLAS detector [9] at the LHC covers nearlythe entire solid angle around the collision point. It con-sists of an inner tracking detector surrounded by a thinsuperconducting solenoid, electromagnetic and hadroniccalorimeters, and a muon spectrometer incorporatingthree superconducting toroid magnet systems.The inner-detector system (ID) is immersed in a 2 Taxial magnetic field and provides charged particle track-ing in the range | η | < .
5. The high-granularity siliconpixel detector covers the vertex region and is surroundedby the silicon microstrip tracker and the transition radi-ation tracker.The calorimeters cover the range | η | < .
9. Within theregion | η | < .
2, electromagnetic calorimetry is providedby barrel and end-cap high-granularity lead liquid-argon(LAr) calorimeters, with an additional thin LAr presam- pler covering | η | < .
8. The electromagnetic calorimeteris backed by a hadronic calorimter. Forward calorimeters(FCal) are located in the range 3 . < | η | < . | η | < . | η | < . √ s NN = 2 .
76 TeV, obtained by the ATLAS ex-periment with integrated luminosity of approximately0.15 nb − . The data sample for this study was collectedusing a three-level trigger system [10], which selectedevents with electron or muon candidates.Electron candidates were identified at the first trig-ger level (L1) as a cluster of cells in the electromagneticcalorimeter, formed into (∆ φ × ∆ η ) = 0 . × . | η | < .
5, excluding the tran-sition region between calorimeter sections (1 . < | η | < . E T = 14 GeV.Muon candidates were selected using all three triggerlevels. The L1 muon trigger searched for patterns of hitsin the trigger chambers consistent with muons. If a muonhad p T exceeding 4 GeV, the event was accepted for fur-ther processing by the high-level trigger (HLT). The L1muon algorithm also identified regions of interest (RoI)within the detector to be investigated by the HLT. Inthe HLT, the track parameters of each muon were recal-culated by including the precision data from the MDTor CSC in the RoI defined by the previous trigger level.Muon candidates were reconstructed either solely fromthe MS or using combined data from the MS and ID. Inaddition to the events selected using the RoI-based muontrigger, the reconstruction was performed over the wholeMS by the HLT to identify muons with p T >
10 GeV. Thefull scan searched all events in which a neutral particlesignal was detected in each of two Zero Degree Calorime-ters (ZDC) ( | η | > . E T >
10 GeV.In addition to the single-lepton trigger, each event hadto pass the minimum-bias (MB) event selection, whichrequired a timing signal coincidence of better than 3 nsbetween the MB trigger scintillators (2 . < | η | < . . ± . × [11].Analyzed events are divided into centrality classes.Centrality reflects the overlap volume of the two collidingnuclei. Collisions with a small (large) impact parameterare referred to as central (peripheral). The overlap vol-ume is closely related to the average number of partici-pant nucleons which scatter inelastically in each nuclearcollision, (cid:104) N part (cid:105) , and to the average number of binarycollisions between the nucleons of the colliding nuclei, (cid:104) N coll (cid:105) . Equivalently, (cid:104) N coll (cid:105) may be defined as the aver-age nuclear thickness function, (cid:104) T AA (cid:105) , multiplied by thetotal inelastic p + p cross section.The Pb+Pb collision centrality is measured using thescalar sum of transverse energy ( (cid:80) E T ) deposited in theFCal, calibrated at the electromagnetic energy scale [12].The fraction of events with more than one Pb+Pb colli-sion is estimated not to exceed 0.05%, except for the mostcentral 5% of events in which the fraction does not ex-ceed 0.5%. A cut on the FCal energy of (cid:80) E T < . (cid:104) N part (cid:105) and (cid:104) N coll (cid:105) , following the pro-cedure documented in Ref. [13]. In the present sample, (cid:104) N coll (cid:105) ( (cid:104) N part (cid:105) ) ranges from 1683 ±
130 (382 ±
2) for themost central class, 0–5%, to 78 ± ±
3) for the mostperipheral class, 40–80%.The efficiencies of the electron and muon triggers areevaluated from 5 . × events selected with the MBtrigger during the 2011 run. The MB trigger requireda transverse energy deposition of E T >
50 GeV in thecalorimeters or a coincidence of both ZDC signals and atrack in the ID. The average trigger efficiency for muonswith p T >
10 GeV decreases from 98 . ± .
5% in pe-ripheral events to 90 . ± .
5% in central events, wherethe ID occupancy is higher. The average trigger effi-ciency for electrons with | η | < . E T >
20 GeV is98 . ± . Z → µµ decays ranges from 99 . ± .
6% inperipheral events to 95 . ± .
9% in central events. For Z → ee decays the efficiency is 99 . ± .
1% independentof centrality.For the Z → ee analysis, electron candidates areformed using the standard ATLAS reconstruction algo-rithm [14], requiring the matching of a track to an en-ergy cluster in the electromagnetic calorimeter. Electronselection is limited to | η | < . E T >
20 GeV. Following the reconstruc- tion requirements, further electron identification cuts aremade to reject background. The standard electron iden-tification cuts [14] used in the p + p environment are notsuited to the Pb+Pb environment due to the large un-derlying event (UE) energy deposition in the calorimeter.To address this, a different set of cuts has been devel-oped to accommodate the modification of the calorime-ter variables by the presence of the UE. The cuts usedare based on the energy balance between the track mo-mentum and cluster energy ( E/p ), as well as calorimetershower shape variables. Furthermore, the UE energy isestimated (following Ref. [15]) and subtracted on anelectron-by-electron basis to recover the proper electronenergy.The electron combined reconstruction and identifica-tion efficiency is evaluated in a Monte Carlo simulationusing electrons from 7 × Pythia (version 6.425) [16] p + p → Z → ee events with 66 < m Z <
116 GeV and | y Z | < . Hijing event generator (version 1.38b) [17]. Theresponse of the ATLAS detector to the generated parti-cles is modeled using GEANT4 [18, 19]. The combinedreconstruction and identification efficiency for electronsof E T >
20 GeV ranges from 72% to 76% from central toperipheral events, with a common absolute uncertaintyof 5.4%.For the Z → ee analysis, all electrons found in trig-gered events are paired with each other, requiring thatat least one electron in the pair match a trigger object.The opposite-sign charged pairs with an invariant masssatisfying 66 < m ee <
102 GeV are accepted as signal Z boson candidates. The same-sign pairs in this window aretaken as an estimate of the combinatorial background. Intotal, 772 opposite-sign pairs and 42 same-sign pairs arereconstructed.In the Z → µµ analysis, single muons are recon-structed with several levels of quality [20]. High qualitymuons are reconstructed in both the MS and ID withconsistent angular measurements, as well as with a goodmatch to the event vertex. At least one muon in eachpair, matched to the trigger, is required to be of suchquality. If the second muon in the pair has hit patternsin the MS and ID satisfying criteria of high reconstruc-tion quality, the minimum p T threshold is set to 10 GeVfor both muons. If the second muon fails this condition,both muons are required to satisfy p T >
20 GeV.The muon combined reconstruction and identificationefficiency is evaluated using muons from 5 . × Pythia p + p → Z → µµ events with 66 < m Z <
116 GeV and | y Z | < . Hijing events. For muonswith p T >
20 GeV, | η | < . ±
1% to 98 ±
1% from central to peripheral events.Requiring a match between the MS and ID reduces theefficiency to 89 ±
1% and 91 ± | η | > . Z → ee analysis, an invariant mass window of66 < m µµ <
102 GeV is used to define oppositely chargedmuon pairs as Z boson candidates and same-sign chargedpairs as a background estimate. In total, 1223 opposite-sign candidates and 14 same-sign pairs are reconstructedin the Z → µµ channel.The invariant mass distributions of the selected pairstogether with estimated combinatorial backgrounds areshown in Fig. 1, compared with the simulation normal-ized to the number of pairs in the region 66 < m (cid:96)(cid:96) <
102 GeV ( (cid:96) = e, µ ). In order to calculate the yield, thecombinatorial background estimated with the same-signpairs must be subtracted. Backgrounds from electroweakprocesses and top pair decays [21] are small compared tothe combinatorial backgrounds, and their contribution isaccounted for in the systematic uncertainty related to thebackground. [GeV] ee m70 80 90 100 110 ] - d m [ G e V ⁄ d N ee fi ZOpposite sign: 772Same sign: 42
ATLAS = 2.76 TeV NN sPb+Pb -1 = 0.15 nb int Data 2011 L [GeV] mm m70 80 90 100 110 c oun t s mmfi Z1223 14Simulation
FIG. 1: The invariant mass distributions of Z → ee (left)and Z → µµ (right) candidates, integrated over momentum,rapidity, and centrality. Bars represent the statistical un-certainty. The number of pairs with 66 < m (cid:96)(cid:96) <
102 GeV(marked by the vertical dashed lines) is listed. The simula-tion is weighted to match the centrality distribution in dataand normalized in the region 66 < m (cid:96)(cid:96) <
102 GeV.
The main sources of systematic uncertainty in bothmeasurement channels are associated with the precisionto which the corrections applied to the data can be calcu-lated. In the p + p environment, the muon reconstructionefficiencies in data and simulation agree to 1% (2% for p T <
15 GeV) [22]. The MS maintains low occupancy inthe Pb+Pb environment. The difference in the fractionof muons reconstructed only in the MS, between data andsimulation is used to estimate the systematic uncertaintyon the reconstruction efficiency. To evaluate the uncer-tainty on the efficiency of the electron identification cuts,the efficiency is computed from the HI data using a tag-and-probe technique [14] and compared to the efficiencycomputed from simulation. The systematic uncertaintydue to momentum resolution is estimated by introducingadditional momentum smearing to the simulation. The efficiency (resolution) uncertainties are ≈ Z → µµ , and 8% (2.5%) in Z → ee ; these estimatesvary with p Z T and y Z .The trigger efficiency uncertainties are estimated byusing alternative methods and comparing their resultswith those obtained from the MB data set. For this com-parison the simulation trigger efficiency is used, as wellas the conditional trigger efficiency of a second lepton ina triggered pair reconstructed as a Z boson.For each Z → (cid:96)(cid:96) analysis, correction factors to ac-count for the efficiency (relative to Z bosons producedwith 66 < m Z <
116 GeV) and detector resolution withinthe selected acceptance based on the simulation are cal-culated differentially in event centrality, p Z T , and y Z . Ineach decay channel, the correction factor is applied andthe background, estimated by the same-sign pairs, issubtracted. The two measurements are averaged withweights set by their respective uncertainties.The fully corrected y Z distribution is shown in Fig. 2.No centrality dependence of this shape is observed. Thedata are compared to a model composed of Pythia events normalized to the Z → (cid:96)(cid:96) cross section in p + p collisions at √ s NN = 2 .
76 TeV taken from next-to-next-to-leading-order (NNLO) calculations used in Ref. [23]and scaled by (cid:104) T AA (cid:105) . Incorporating p + n and n + n colli-sions would increase the cross section by 3%. The shapeis well reproduced by Pythia , and the integrated yieldis in good agreement with the (cid:104) T AA (cid:105) -scaled NNLO crosssection. -2 0 2 d y ll fi Z d N e v en t s N ATLAS = 2.76 TeV NN sPb+Pb -1 = 0.15 nb int Data 2011 LCentrality 0-80% ll fi Z Model Z y -2 -1 0 1 2 M ode l D a t a FIG. 2: The corrected per-event rapidity distribution of mea-sured Z bosons. Bars and boxes represent statistical and sys-tematic uncertainties, respectively. The data are comparedto the model distribution shown as a band whose width is thenormalization uncertainty. The fully corrected p T distributions in five centralityclasses are shown in the left panel of Fig. 3 along with themodel prediction. The shape as a function of p Z T is wellreproduced by Pythia . The right panel of Fig. 3 showsthe ratios of the data to the
Pythia prediction scaled by (cid:104) T AA (cid:105) . The ratios are constant within uncertainties forall centrality classes over the range of measured p Z T . [GeV] ZT p1 10 ] - [ G e V T dp T p | y | < . ll fi Z d N e v en t s N -2 ATLAS = 2.76 TeV NN sPb+Pb Data 2011 -1 = 0.15 nb int L 100) · · · [GeV] ZT p1 10 D a t a / M ode l FIG. 3: Left: corrected per-event p Z T spectra of measured Z bosons in five centrality classes. The data are compared toa Pythia simulation normalized to the NNLO p + p crosssection and scaled by (cid:104) T AA (cid:105) , shown as bands. Right: ra-tios of the data to the model in each centrality class. Barsrepresent statistical uncertainties, boxes represent systematicuncertainties, and bands represent the normalization uncer-tainty. To further examine the binary collision scaling of thedata, the Z boson per-event yields, divided by (cid:104) N coll (cid:105) ,are shown in Fig. 4 as a function of (cid:104) N part (cid:105) , in several p Z T bins. The figure demonstrates that the Z → ee and Z → µµ results are consistent within their uncertaintiesfor all p Z T and centrality regions. Within the statisticalsignificance of the data sample, the Z boson per-eventyield obeys binary collision scaling.The elliptic anisotropy, v , of the Z boson is defined as v = (cid:104) cos 2( φ − Ψ ) (cid:105) /σ , where φ is the azimuthal angle ofthe Z boson momentum vector and Ψ is the azimuthalangle of the event plane, the plane containing the mo-mentum vectors of both lead nuclei and measured withresolution σ [24]. The v values measured in the two de-cay channels are consistent and are combined. The mainuncertainty on the v measurement arises from the eventplane (EP) resolution, which is measured from the differ-ence of Ψ determined using the two sides of the FCal atpositive and negative rapidities [24]. To ensure that thejets associated with Z boson production do not affect thedetermination of Ψ , the EP resolution is also measuredordering the FCal sides in the difference according to thedirection of the Z boson. A systematic uncertainty of æ part N Æ e v en t s N | y | < . ll fi Z N æ c o ll N Æ ATLAS = 2.76 TeV NN sPb+Pb -1 = 0.15 nb int Data 2011 L ee fi Z ll fi Z mm fi Z ZT All p<10GeV ZT p <30GeV ZT ZT p FIG. 4: Centrality dependence of Z boson yields divided by (cid:104) N coll (cid:105) . Results for ee (upward pointing triangles) and µµ (downward pointing triangles) channels are shifted left andright, respectively, from their weighted average (diamonds).Bars and boxes represent statistical and systematic uncer-tainties, respectively. For the combined results, the bracketsshow the combined uncertainty including the uncertainty on (cid:104) N coll (cid:105) , and the dashed lines show the results of fits, using aconstant.
12 mrad is assigned for possible EP distortion.The v of the Z boson is shown in Fig. 5 as a func-tion of | y Z | , p Z T , and (cid:104) N part (cid:105) . The averaged v of | Z |y0 1 2 v -0.10.00.1 [GeV] ZT p v -0.10.00.1 æ part N Æ
200 400 v -0.10.00.1 ATLAS = 2.76 TeV NN sPb+Pb -1 = 0.15 nb int Data 2011 LCentrality: 0-80%
FIG. 5: v as a function of | y Z | (left), p Z T (center), and (cid:104) N part (cid:105) (right). Bars and boxes represent statistical and systematicuncertainties, respectively. The dashed lines show the resultsof constant fits to the v values, considering only statisticaluncertainties. the Z boson has been measured to be v = − . ± . ± . Z → (cid:96)(cid:96) yields being unaffected bythe medium in HI collisions.Using the ATLAS detector, Z boson production hasbeen measured in Pb+Pb collisions at √ s NN =2.76 TeVusing 0.15 nb − of integrated luminosity collected in the2011 LHC physics run. Within | y Z | < .
5, and 66 102 GeV, a total of 772 and 1223 Z boson can-didates are reconstructed in the Z → ee and Z → µµ channels, respectively. The combinatorial background isat the level of 5% in the di-electron channel and 1% forthe di-muon channel. The Z boson production yield in-tegrated over | y Z | < . p T and centrality regions. Themomentum and rapidity distributions of the Z bosons areconsistent with Pythia simulations of Z boson produc-tion in p + p collisions scaled to the NNLO cross sectionand multiplied by (cid:104) T AA (cid:105) . Within the uncertainties the Z boson yield is found to be proportional to (cid:104) N coll (cid:105) . Theelliptic anisotropy of the Z boson measured as a functionof rapidity, p Z T and (cid:104) N part (cid:105) is consistent with zero withinthe uncertainties of the measurements.We thank CERN for the very successful operation ofthe LHC, as well as the support staff from our institutionswithout whom ATLAS could not be operated efficiently.We acknowledge the support of ANPCyT, Ar-gentina; YerPhI, Armenia; ARC, Australia; BMWFand FWF, Austria; ANAS, Azerbaijan; SSTC, Be-larus; CNPq and FAPESP, Brazil; NSERC, NRCand CFI, Canada; CERN; CONICYT, Chile; CAS,MOST and NSFC, China; COLCIENCIAS, Colombia;MSMT CR, MPO CR and VSC CR, Czech Republic;DNRF, DNSRC and Lundbeck Foundation, Denmark;EPLANET and ERC, European Union; IN2P3-CNRS,CEA-DSM/IRFU, France; GNSF, Georgia; BMBF,DFG, HGF, MPG and AvH Foundation, Germany;GSRT, Greece; ISF, MINERVA, GIF, DIP and BenoziyoCenter, Israel; INFN, Italy; MEXT and JSPS, Japan;CNRST, Morocco; FOM and NWO, Netherlands; BRFand RCN, Norway; MNiSW, Poland; GRICES and FCT,Portugal; MERYS (MECTS), Romania; MES of Rus-sia and ROSATOM, Russian Federation; JINR; MSTD,Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia;DST/NRF, South Africa; MICINN, Spain; SRC andWallenberg Foundation, Sweden; SER, SNSF and Can-tons of Bern and Geneva, Switzerland; NSC, Taiwan;TAEK, Turkey; STFC, the Royal Society and Lever-hulme Trust, United Kingdom; DOE and NSF, UnitedStates of America.The crucial computing support from all WLCG part-ners is acknowledged gratefully, in particular fromCERN and the ATLAS Tier-1 facilities at TRIUMF(Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF(Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Tai- wan), RAL (UK) and BNL (USA) and in the Tier-2 fa-cilities worldwide. 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Bittner , K.M. Black , R.E. Blair ,J.-B. Blanchard , G. Blanchot , T. Blazek , I. Bloch , C. Blocker , J. Blocki , A. Blondel , W. Blum ,U. Blumenschein , G.J. Bobbink , V.B. Bobrovnikov , S.S. Bocchetta , A. Bocci , C.R. Boddy ,M. Boehler , J. Boek , N. Boelaert , J.A. Bogaerts , A. Bogdanchikov , A. Bogouch , ∗ , C. Bohm ,J. Bohm , V. Boisvert , T. Bold , V. Boldea , N.M. Bolnet , M. Bomben , M. Bona , M. Boonekamp ,S. Bordoni , C. Borer , A. Borisov , G. Borissov , I. Borjanovic , M. Borri , S. Borroni ,V. Bortolotto , , K. Bos , D. Boscherini , M. Bosman , H. Boterenbrood , J. Bouchami ,J. Boudreau , E.V. Bouhova-Thacker , D. Boumediene , C. Bourdarios , N. Bousson , A. Boveia ,J. Boyd , I.R. Boyko , I. Bozovic-Jelisavcic , J. Bracinik , P. Branchini , G.W. Brandenburg , A. Brandt ,G. Brandt , O. Brandt , U. Bratzler , B. Brau , J.E. Brau , H.M. Braun , ∗ , S.F. Brazzale , ,B. Brelier , J. Bremer , K. Brendlinger , R. Brenner , S. Bressler , D. Britton , F.M. Brochu , I. Brock ,R. Brock , F. Broggi , C. Bromberg , J. Bronner , G. Brooijmans , T. Brooks , W.K. Brooks ,G. Brown , H. Brown , P.A. Bruckman de Renstrom , D. Bruncko , R. Bruneliere , S. Brunet , A. Bruni ,G. Bruni , M. Bruschi , T. Buanes , Q. Buat , F. Bucci , J. Buchanan , P. Buchholz ,R.M. Buckingham , A.G. Buckley , S.I. Buda , I.A. Budagov , B. Budick , V. B¨uscher , L. Bugge ,O. Bulekov , A.C. Bundock , M. Bunse , T. Buran , H. Burckhart , S. Burdin , T. Burgess , S. Burke ,E. Busato , P. Bussey , C.P. Buszello , B. Butler , J.M. Butler , C.M. Buttar , J.M. Butterworth ,W. Buttinger , S. Cabrera Urb´an , D. Caforio , , O. Cakir , P. Calafiura , G. Calderini , P. Calfayan ,R. Calkins , L.P. Caloba , R. Caloi , , D. Calvet , S. Calvet , R. Camacho Toro , P. Camarri , ,D. Cameron , L.M. Caminada , R. Caminal Armadans , S. Campana , M. Campanelli , V. Canale , ,F. Canelli ,g , A. Canepa , J. Cantero , R. Cantrill , L. Capasso , , M.D.M. Capeans Garrido ,I. Caprini , M. Caprini , D. Capriotti , M. Capua , , R. Caputo , R. Cardarelli , T. Carli ,G. Carlino , L. Carminati , , B. Caron , S. Caron , E. Carquin , G.D. Carrillo Montoya ,A.A. Carter , J.R. Carter , J. Carvalho ,h , D. Casadei , M.P. Casado , M. Cascella , , C. Caso , , ∗ ,A.M. Castaneda Hernandez ,i , E. Castaneda-Miranda , V. Castillo Gimenez , N.F. Castro , G. Cataldi ,P. Catastini , A. Catinaccio , J.R. Catmore , A. Cattai , G. Cattani , , S. Caughron , V. Cavaliere ,P. Cavalleri , D. Cavalli , M. Cavalli-Sforza , V. Cavasinni , , F. Ceradini , , A.S. Cerqueira ,A. Cerri , L. Cerrito , F. Cerutti , S.A. Cetin , A. Chafaq , D. Chakraborty , I. Chalupkova , K. Chan ,P. Chang , B. Chapleau , J.D. Chapman , J.W. Chapman , E. Chareyre , D.G. Charlton , V. Chavda ,C.A. Chavez Barajas , S. Cheatham , S. Chekanov , S.V. Chekulaev , G.A. Chelkov , M.A. Chelstowska ,C. Chen , H. Chen , S. Chen , X. Chen , Y. Chen , Y. Cheng , A. Cheplakov ,R. Cherkaoui El Moursli , V. Chernyatin , E. Cheu , S.L. Cheung , L. Chevalier , G. Chiefari , ,L. Chikovani , ∗ , J.T. Childers , A. Chilingarov , G. Chiodini , A.S. Chisholm , R.T. Chislett , A. Chitan ,M.V. Chizhov , G. Choudalakis , S. Chouridou , I.A. Christidi , A. Christov , D. Chromek-Burckhart ,M.L. Chu , J. Chudoba , G. Ciapetti , , A.K. Ciftci , R. Ciftci , D. Cinca , V. Cindro ,C. Ciocca , , A. Ciocio , M. Cirilli , P. Cirkovic , Z.H. Citron , M. Citterio , M. Ciubancan ,A. Clark , P.J. Clark , R.N. Clarke , W. Cleland , J.C. Clemens , B. Clement , C. Clement , ,Y. Coadou , M. Cobal , , A. Coccaro , J. Cochran , L. Coffey , J.G. Cogan , J. Coggeshall ,E. Cogneras , J. Colas , S. Cole , A.P. Colijn , N.J. Collins , C. Collins-Tooth , J. Collot ,T. Colombo , , G. Colon , G. Compostella , P. Conde Mui˜no , E. Coniavitis , M.C. Conidi ,S.M. Consonni , , V. Consorti , S. Constantinescu , C. Conta , , G. Conti , F. Conventi ,j ,M. Cooke , B.D. Cooper , A.M. Cooper-Sarkar , K. Copic , T. Cornelissen , M. Corradi , F. Corriveau ,k ,A. Cortes-Gonzalez , G. Cortiana , G. Costa , M.J. Costa , D. Costanzo , D. Cˆot´e , L. Courneyea ,G. Cowan , C. Cowden , B.E. Cox , K. Cranmer , F. Crescioli , , M. Cristinziani , G. Crosetti , ,S. Cr´ep´e-Renaudin , C.-M. Cuciuc , C. Cuenca Almenar , T. Cuhadar Donszelmann , M. Curatolo ,C.J. Curtis , C. Cuthbert , P. Cwetanski , H. Czirr , P. Czodrowski , Z. Czyczula , S. D’Auria ,M. D’Onofrio , A. D’Orazio , , M.J. Da Cunha Sargedas De Sousa , C. Da Via , W. Dabrowski ,A. Dafinca , T. Dai , C. Dallapiccola , M. Dam , M. Dameri , , D.S. Damiani , H.O. Danielsson ,V. Dao , G. Darbo , G.L. Darlea , J.A. Dassoulas , W. Davey , T. Davidek , N. Davidson ,R. Davidson , E. Davies ,c , M. Davies , O. Davignon , A.R. Davison , Y. Davygora , E. Dawe ,I. Dawson , R.K. Daya-Ishmukhametova , K. De , R. de Asmundis , S. De Castro , , S. De Cecco ,J. de Graat , N. De Groot , P. de Jong , C. De La Taille , H. De la Torre , F. De Lorenzi , L. de Mora ,L. De Nooij , D. De Pedis , A. De Salvo , U. De Sanctis , , A. De Santo , J.B. De Vivie De Regie ,G. De Zorzi , , W.J. Dearnaley , R. Debbe , C. Debenedetti , B. Dechenaux , D.V. Dedovich ,J. Degenhardt , C. Del Papa , , J. Del Peso , T. Del Prete , , T. Delemontex , M. Deliyergiyev ,A. Dell’Acqua , L. Dell’Asta , M. Della Pietra ,j , D. della Volpe , , M. Delmastro , P.A. Delsart ,C. Deluca , S. Demers , M. Demichev , B. Demirkoz ,l , J. Deng , S.P. Denisov , D. Derendarz ,J.E. Derkaoui , F. Derue , P. Dervan , K. Desch , E. Devetak , P.O. Deviveiros , A. Dewhurst ,B. DeWilde , S. Dhaliwal , R. Dhullipudi ,m , A. Di Ciaccio , , L. Di Ciaccio , A. Di Girolamo ,B. Di Girolamo , S. Di Luise , , A. Di Mattia , B. Di Micco , R. Di Nardo , A. Di Simone , ,R. Di Sipio , , M.A. Diaz , E.B. Diehl , J. Dietrich , T.A. Dietzsch , S. Diglio , K. Dindar Yagci ,J. Dingfelder , F. Dinut , C. Dionisi , , P. Dita , S. Dita , F. Dittus , F. Djama , T. Djobava ,M.A.B. do Vale , A. Do Valle Wemans ,n , T.K.O. Doan , M. Dobbs , R. Dobinson , ∗ , D. Dobos ,E. Dobson ,o , J. Dodd , C. Doglioni , T. Doherty , Y. Doi , ∗ , J. Dolejsi , I. Dolenc , Z. Dolezal ,B.A. Dolgoshein , ∗ , T. Dohmae , M. Donadelli , J. Donini , J. Dopke , A. Doria , A. Dos Anjos ,A. Dotti , , M.T. Dova , A.D. Doxiadis , A.T. Doyle , N. Dressnandt , M. Dris , J. Dubbert ,S. Dube , E. Duchovni , G. Duckeck , D. Duda , A. Dudarev , F. Dudziak , M. D¨uhrssen ,I.P. Duerdoth , L. Duflot , M-A. Dufour , L. Duguid , M. Dunford , H. Duran Yildiz , R. Duxfield ,M. Dwuznik , F. Dydak , M. D¨uren , W.L. Ebenstein , J. Ebke , S. Eckweiler , K. Edmonds , W. Edson ,C.A. Edwards , N.C. Edwards , W. Ehrenfeld , T. Eifert , G. Eigen , K. Einsweiler , E. Eisenhandler ,T. Ekelof , M. El Kacimi , M. Ellert , S. Elles , F. Ellinghaus , K. Ellis , N. Ellis , J. Elmsheuser ,M. Elsing , D. Emeliyanov , R. Engelmann , A. Engl , B. Epp , J. Erdmann , A. Ereditato ,D. Eriksson , J. Ernst , M. Ernst , J. Ernwein , D. Errede , S. Errede , E. Ertel , M. Escalier ,H. Esch , C. Escobar , X. Espinal Curull , B. Esposito , F. Etienne , A.I. Etienvre , E. Etzion ,D. Evangelakou , H. Evans , L. Fabbri , , C. Fabre , R.M. Fakhrutdinov , S. Falciano , Y. Fang ,M. Fanti , , A. Farbin , A. Farilla , J. Farley , T. Farooque , S. Farrell , S.M. Farrington ,P. Farthouat , F. Fassi , P. Fassnacht , D. Fassouliotis , B. Fatholahzadeh , A. Favareto , , L. Fayard ,S. Fazio , , R. Febbraro , P. Federic , O.L. Fedin , W. Fedorko , M. Fehling-Kaschek , L. Feligioni ,D. Fellmann , C. Feng , E.J. Feng , A.B. Fenyuk , J. Ferencei , W. Fernando , S. Ferrag , J. Ferrando ,V. Ferrara , A. Ferrari , P. Ferrari , R. Ferrari , D.E. Ferreira de Lima , A. Ferrer , D. Ferrere ,C. Ferretti , A. Ferretto Parodi , , M. Fiascaris , F. Fiedler , A. Filipˇciˇc , F. Filthaut ,M. Fincke-Keeler , M.C.N. Fiolhais ,h , L. Fiorini , A. Firan , G. Fischer , M.J. Fisher , M. Flechl ,I. Fleck , J. Fleckner , P. Fleischmann , S. Fleischmann , T. Flick , A. Floderus , L.R. Flores Castillo ,M.J. Flowerdew , T. Fonseca Martin , A. Formica , A. Forti , D. Fortin , D. Fournier , A.J. Fowler ,H. Fox , P. Francavilla , M. Franchini , , S. Franchino , , D. Francis , T. Frank , M. Franklin ,S. Franz , M. Fraternali , , S. Fratina , S.T. French , C. Friedrich , F. Friedrich , R. Froeschl ,D. Froidevaux , J.A. Frost , C. Fukunaga , E. Fullana Torregrosa , B.G. Fulsom , J. Fuster ,C. Gabaldon , O. Gabizon , T. Gadfort , S. Gadomski , G. Gagliardi , , P. Gagnon , C. Galea ,B. Galhardo , E.J. Gallas , V. Gallo , B.J. Gallop , P. Gallus , K.K. Gan , Y.S. Gao ,e ,A. Gaponenko , F. Garberson , M. Garcia-Sciveres , C. Garc´ıa , J.E. Garc´ıa Navarro , R.W. Gardner ,N. Garelli , H. Garitaonandia , V. Garonne , C. Gatti , G. Gaudio , B. Gaur , L. Gauthier ,P. Gauzzi , , I.L. Gavrilenko , C. Gay , G. Gaycken , E.N. Gazis , P. Ge , Z. Gecse , C.N.P. Gee ,D.A.A. Geerts , Ch. Geich-Gimbel , K. Gellerstedt , , C. Gemme , A. Gemmell , M.H. Genest ,S. Gentile , , M. George , S. George , P. Gerlach , A. Gershon , C. Geweniger , H. Ghazlane ,N. Ghodbane , B. Giacobbe , S. Giagu , , V. Giakoumopoulou , V. Giangiobbe , F. Gianotti ,B. Gibbard , A. Gibson , S.M. Gibson , D. Gillberg , A.R. Gillman , D.M. Gingrich ,d , J. Ginzburg ,N. Giokaris , M.P. Giordani , R. Giordano , , F.M. Giorgi , P. Giovannini , P.F. Giraud , D. Giugni ,M. Giunta , P. Giusti , B.K. Gjelsten , L.K. Gladilin , C. Glasman , J. Glatzer , A. Glazov ,K.W. Glitza , G.L. Glonti , J.R. Goddard , J. Godfrey , J. Godlewski , M. Goebel , T. G¨opfert ,C. Goeringer , C. G¨ossling , S. Goldfarb , T. Golling , A. Gomes ,b , L.S. Gomez Fajardo , R. Gon¸calo ,J. Goncalves Pinto Firmino Da Costa , L. Gonella , S. Gonz´alez de la Hoz , G. Gonzalez Parra ,M.L. Gonzalez Silva , S. Gonzalez-Sevilla , J.J. Goodson , L. Goossens , P.A. Gorbounov , H.A. Gordon ,I. Gorelov , G. Gorfine , B. Gorini , E. Gorini , , A. Goriˇsek , E. Gornicki , B. Gosdzik , A.T. Goshaw ,M. Gosselink , M.I. Gostkin , I. Gough Eschrich , M. Gouighri , D. Goujdami , M.P. Goulette ,A.G. Goussiou , C. Goy , S. Gozpinar , I. Grabowska-Bold , P. Grafstr¨om , , K-J. Grahn , E. Gramstad ,F. Grancagnolo , S. Grancagnolo , V. Grassi , V. Gratchev , N. Grau , H.M. Gray , J.A. Gray ,E. Graziani , O.G. Grebenyuk , T. Greenshaw , Z.D. Greenwood ,m , K. Gregersen , I.M. Gregor ,P. Grenier , J. Griffiths , N. Grigalashvili , A.A. Grillo , S. Grinstein , Ph. Gris , Y.V. Grishkevich ,J.-F. Grivaz , E. Gross , J. Grosse-Knetter , J. Groth-Jensen , K. Grybel , D. Guest , C. Guicheney ,S. Guindon , U. Gul , J. Gunther , B. Guo , J. Guo , P. Gutierrez , N. Guttman , O. Gutzwiller ,C. Guyot , C. Gwenlan , C.B. Gwilliam , A. Haas , S. Haas , C. Haber , H.K. Hadavand , D.R. Hadley ,P. Haefner , F. Hahn , S. Haider , Z. Hajduk , H. Hakobyan , D. Hall , K. Hamacher , P. Hamal ,M. Hamer , A. Hamilton ,p , S. Hamilton , L. Han , K. Hanagaki , K. Hanawa , M. Hance ,C. Handel , P. Hanke , J.R. Hansen , J.B. Hansen , J.D. Hansen , P.H. Hansen , P. Hansson , K. Hara ,G.A. Hare , T. Harenberg , S. Harkusha , D. Harper , R.D. Harrington , O.M. Harris , J. Hartert ,F. Hartjes , T. Haruyama , A. Harvey , S. Hasegawa , Y. Hasegawa , S. Hassani , S. Haug ,M. Hauschild , R. Hauser , M. Havranek , C.M. Hawkes , R.J. Hawkings , A.D. Hawkins , T. Hayakawa ,T. Hayashi , D. Hayden , C.P. Hays , H.S. Hayward , S.J. Haywood , S.J. Head , V. Hedberg ,L. Heelan , S. Heim , B. Heinemann , S. Heisterkamp , L. Helary , C. Heller , M. Heller , S. Hellman , ,D. Hellmich , C. Helsens , R.C.W. Henderson , M. Henke , A. Henrichs , A.M. Henriques Correia ,S. Henrot-Versille , C. Hensel , T. Henß , C.M. Hernandez , Y. Hern´andez Jim´enez , R. Herrberg ,G. Herten , R. Hertenberger , L. Hervas , G.G. Hesketh , N.P. Hessey , E. Hig´on-Rodriguez , J.C. Hill ,K.H. Hiller , S. Hillert , S.J. Hillier , I. Hinchliffe , E. Hines , M. Hirose , F. Hirsch , D. Hirschbuehl ,J. Hobbs , N. Hod , M.C. Hodgkinson , P. Hodgson , A. Hoecker , M.R. Hoeferkamp , J. Hoffman ,D. Hoffmann , M. Hohlfeld , M. Holder , S.O. Holmgren , T. Holy , J.L. Holzbauer , T.M. Hong ,L. Hooft van Huysduynen , S. Horner , J-Y. Hostachy , S. Hou , A. Hoummada , J. Howard ,J. Howarth , I. Hristova , J. Hrivnac , T. Hryn’ova , P.J. Hsu , S.-C. Hsu , D. Hu , Z. Hubacek ,F. Hubaut , F. Huegging , A. Huettmann , T.B. Huffman , E.W. Hughes , G. Hughes , M. Huhtinen ,M. Hurwitz , N. Huseynov ,q , J. Huston , J. Huth , G. Iacobucci , G. Iakovidis , M. Ibbotson ,I. Ibragimov , L. Iconomidou-Fayard , J. Idarraga , P. Iengo , O. Igonkina , Y. Ikegami , M. Ikeno ,D. Iliadis , N. Ilic , T. Ince , J. Inigo-Golfin , P. Ioannou , M. Iodice , K. Iordanidou , V. Ippolito , ,A. Irles Quiles , C. Isaksson , M. Ishino , M. Ishitsuka , R. Ishmukhametov , C. Issever , S. Istin ,A.V. Ivashin , W. Iwanski , H. Iwasaki , J.M. Izen , V. Izzo , B. Jackson , J.N. Jackson , P. Jackson ,M.R. Jaekel , V. Jain , K. Jakobs , S. Jakobsen , T. Jakoubek , J. Jakubek , D.O. Jamin , D.K. Jana ,E. Jansen , H. Jansen , A. Jantsch , M. Janus , G. Jarlskog , L. Jeanty , I. Jen-La Plante , D. Jennens ,P. Jenni , A.E. Loevschall-Jensen , P. Jeˇz , S. J´ez´equel , M.K. Jha , H. Ji , W. Ji , J. Jia , Y. Jiang ,M. Jimenez Belenguer , S. Jin , O. Jinnouchi , M.D. Joergensen , D. Joffe , M. Johansen , ,K.E. Johansson , P. Johansson , S. Johnert , K.A. Johns , K. Jon-And , , G. Jones , R.W.L. Jones ,T.J. Jones , C. Joram , P.M. Jorge , K.D. Joshi , J. Jovicevic , T. Jovin , X. Ju , C.A. Jung ,R.M. Jungst , V. Juranek , P. Jussel , A. Juste Rozas , S. Kabana , M. Kaci , A. Kaczmarska ,P. Kadlecik , M. Kado , H. Kagan , M. Kagan , E. Kajomovitz , S. Kalinin , L.V. Kalinovskaya ,S. Kama , N. Kanaya , M. Kaneda , S. Kaneti , T. Kanno , V.A. Kantserov , J. Kanzaki , B. Kaplan ,A. Kapliy , J. Kaplon , D. Kar , M. Karagounis , K. Karakostas , M. Karnevskiy , V. Kartvelishvili ,A.N. Karyukhin , L. Kashif , G. Kasieczka , R.D. Kass , A. Kastanas , M. Kataoka , Y. Kataoka ,E. Katsoufis , J. Katzy , V. Kaushik , K. Kawagoe , T. Kawamoto , G. Kawamura , M.S. Kayl ,S. Kazama , V.A. Kazanin , M.Y. Kazarinov , R. Keeler , P.T. Keener , R. Kehoe , M. Keil ,G.D. Kekelidze , J.S. Keller , M. Kenyon , O. Kepka , N. Kerschen , B.P. Kerˇsevan , S. Kersten ,K. Kessoku , J. Keung , F. Khalil-zada , H. Khandanyan , , A. Khanov , D. Kharchenko ,A. Khodinov , A. Khomich , T.J. Khoo , G. Khoriauli , A. Khoroshilov , V. Khovanskiy , E. Khramov ,J. Khubua , H. Kim , , S.H. Kim , N. Kimura , O. Kind , B.T. King , M. King , R.S.B. King ,J. Kirk , A.E. Kiryunin , T. Kishimoto , D. Kisielewska , T. Kitamura , T. Kittelmann , K. Kiuchi ,E. Kladiva , M. Klein , U. Klein , K. Kleinknecht , M. Klemetti , A. Klier , P. Klimek , ,A. Klimentov , R. Klingenberg , J.A. Klinger , E.B. Klinkby , T. Klioutchnikova , P.F. Klok , S. Klous ,E.-E. Kluge , T. Kluge , P. Kluit , S. Kluth , E. Kneringer , E.B.F.G. Knoops , A. Knue , B.R. Ko ,T. Kobayashi , M. Kobel , M. Kocian , P. Kodys , K. K¨oneke , A.C. K¨onig , S. Koenig , L. K¨opke ,F. Koetsveld , P. Koevesarki , T. Koffas , E. Koffeman , L.A. Kogan , S. Kohlmann , F. Kohn ,Z. Kohout , T. Kohriki , T. Koi , G.M. Kolachev , ∗ , H. Kolanoski , V. Kolesnikov , I. Koletsou ,J. Koll , A.A. Komar , Y. Komori , T. Kondo , T. Kono ,r , A.I. Kononov , R. Konoplich ,s ,N. Konstantinidis , R. Kopeliansky , S. Koperny , K. Korcyl , K. Kordas , A. Korn , A. Korol ,I. Korolkov , E.V. Korolkova , V.A. Korotkov , O. Kortner , S. Kortner , V.V. Kostyukhin , S. Kotov ,V.M. Kotov , A. Kotwal , C. Kourkoumelis , V. Kouskoura , A. Koutsman , R. Kowalewski ,T.Z. Kowalski , W. Kozanecki , A.S. Kozhin , V. Kral , V.A. Kramarenko , G. Kramberger ,M.W. Krasny , A. Krasznahorkay , J.K. Kraus , S. Kreiss , F. Krejci , J. Kretzschmar , N. Krieger ,P. Krieger , K. Kroeninger , H. Kroha , J. Kroll , J. Kroseberg , J. Krstic , U. Kruchonak , H. Kr¨uger ,T. Kruker , N. Krumnack , Z.V. Krumshteyn , T. Kubota , S. Kuday , S. Kuehn , A. Kugel , T. Kuhl ,D. Kuhn , V. Kukhtin , Y. Kulchitsky , S. Kuleshov , C. Kummer , M. Kuna , J. Kunkle , A. Kupco ,H. Kurashige , M. Kurata , Y.A. Kurochkin , V. Kus , E.S. Kuwertz , M. Kuze , J. Kvita , R. Kwee ,A. La Rosa , L. La Rotonda , , L. Labarga , J. Labbe , S. Lablak , C. Lacasta , F. Lacava , ,J. Lacey , H. Lacker , D. Lacour , V.R. Lacuesta , E. Ladygin , R. Lafaye , B. Laforge , T. Lagouri ,S. Lai , E. Laisne , M. Lamanna , L. Lambourne , C.L. Lampen , W. Lampl , E. Lancon , U. Landgraf ,M.P.J. Landon , V.S. Lang , C. Lange , A.J. Lankford , F. Lanni , K. Lantzsch , S. Laplace ,C. Lapoire , J.F. Laporte , T. Lari , A. Larner , M. Lassnig , P. Laurelli , V. Lavorini , ,W. Lavrijsen , P. Laycock , O. Le Dortz , E. Le Guirriec , E. Le Menedeu , T. LeCompte ,F. Ledroit-Guillon , H. Lee , J.S.H. Lee , S.C. Lee , L. Lee , M. Lefebvre , M. Legendre , F. Legger ,C. Leggett , M. Lehmacher , G. Lehmann Miotto , M.A.L. Leite , R. Leitner , D. Lellouch , B. Lemmer ,V. Lendermann , K.J.C. Leney , T. Lenz , G. Lenzen , B. Lenzi , K. Leonhardt , S. Leontsinis ,F. Lepold , C. Leroy , J-R. Lessard , C.G. Lester , C.M. Lester , J. Levˆeque , D. Levin , L.J. Levinson ,A. Lewis , G.H. Lewis , A.M. Leyko , M. Leyton , B. Li , H. Li , H.L. Li , S. Li ,t , X. Li ,Z. Liang ,u , H. Liao , B. Liberti , P. Lichard , M. Lichtnecker , K. Lie , W. Liebig , C. Limbach ,A. Limosani , M. Limper , S.C. Lin ,v , F. Linde , J.T. Linnemann , E. Lipeles , A. Lipniacka ,T.M. Liss , D. Lissauer , A. Lister , A.M. Litke , C. Liu , D. Liu , H. Liu , J.B. Liu , L. Liu ,M. Liu , Y. Liu , M. Livan , , S.S.A. Livermore , A. Lleres , J. Llorente Merino , S.L. Lloyd ,E. Lobodzinska , P. Loch , W.S. Lockman , T. Loddenkoetter , F.K. Loebinger , A. Loginov , C.W. Loh ,T. Lohse , K. Lohwasser , M. Lokajicek , V.P. Lombardo , R.E. Long , L. Lopes , D. Lopez Mateos ,J. Lorenz , N. Lorenzo Martinez , M. Losada , P. Loscutoff , F. Lo Sterzo , , M.J. Losty , ∗ , X. Lou ,A. Lounis , K.F. Loureiro , J. Love , P.A. Love , A.J. Lowe ,e , F. Lu , H.J. Lubatti , C. Luci , ,0A. Lucotte , A. Ludwig , D. Ludwig , I. Ludwig , J. Ludwig , F. Luehring , G. Luijckx , W. Lukas ,L. Luminari , E. Lund , B. Lund-Jensen , B. Lundberg , J. Lundberg , , O. Lundberg , ,J. Lundquist , M. Lungwitz , D. Lynn , E. Lytken , H. Ma , L.L. Ma , G. Maccarrone , A. Macchiolo ,B. Maˇcek , J. Machado Miguens , R. Mackeprang , R.J. Madaras , H.J. Maddocks , W.F. Mader ,R. Maenner , T. Maeno , P. M¨attig , S. M¨attig , L. Magnoni , E. Magradze , K. Mahboubi ,J. Mahlstedt , S. Mahmoud , G. Mahout , C. Maiani , C. Maidantchik , A. Maio ,b , S. Majewski ,Y. Makida , N. Makovec , P. Mal , B. Malaescu , Pa. Malecki , P. Malecki , V.P. Maleev , F. Malek ,U. Mallik , D. Malon , C. Malone , S. Maltezos , V. Malyshev , S. Malyukov , R. Mameghani ,J. Mamuzic , A. Manabe , L. Mandelli , I. Mandi´c , R. Mandrysch , J. Maneira , A. Manfredini ,P.S. Mangeard , L. Manhaes de Andrade Filho , J.A. Manjarres Ramos , A. Mann , P.M. Manning ,A. Manousakis-Katsikakis , B. Mansoulie , A. Mapelli , L. Mapelli , L. March , J.F. Marchand ,F. Marchese , , G. Marchiori , M. Marcisovsky , C.P. Marino , F. Marroquim , Z. Marshall ,F.K. Martens , L.F. Marti , S. Marti-Garcia , B. Martin , B. Martin , J.P. Martin , T.A. Martin ,V.J. Martin , B. Martin dit Latour , S. Martin-Haugh , M. Martinez , V. Martinez Outschoorn ,A.C. Martyniuk , M. Marx , F. Marzano , A. Marzin , L. Masetti , T. Mashimo , R. Mashinistov ,J. Masik , A.L. Maslennikov , I. Massa , , G. Massaro , N. Massol , P. Mastrandrea ,A. Mastroberardino , , T. Masubuchi , P. Matricon , H. Matsunaga , T. Matsushita , C. Mattravers ,c ,J. Maurer , S.J. Maxfield , A. Mayne , R. Mazini , M. Mazur , L. Mazzaferro , , M. Mazzanti ,J. Mc Donald , S.P. Mc Kee , A. McCarn , R.L. McCarthy , T.G. McCarthy , N.A. McCubbin ,K.W. McFarlane , ∗ , J.A. Mcfayden , G. Mchedlidze , T. Mclaughlan , S.J. McMahon ,R.A. McPherson ,k , A. Meade , J. Mechnich , M. Mechtel , M. Medinnis , R. Meera-Lebbai ,T. Meguro , R. Mehdiyev , S. Mehlhase , A. Mehta , K. Meier , B. Meirose , C. Melachrinos ,B.R. Mellado Garcia , F. Meloni , , L. Mendoza Navas , Z. Meng ,w , A. Mengarelli , , S. Menke ,E. Meoni , K.M. Mercurio , P. Mermod , L. Merola , , C. Meroni , F.S. Merritt , H. Merritt ,A. Messina ,x , J. Metcalfe , A.S. Mete , C. Meyer , C. Meyer , J-P. Meyer , J. Meyer , J. Meyer ,T.C. Meyer , S. Michal , L. Micu , R.P. Middleton , S. Migas , L. Mijovi´c , G. Mikenberg ,M. Mikestikova , M. Mikuˇz , D.W. Miller , R.J. Miller , W.J. Mills , C. Mills , A. Milov ,D.A. Milstead , , D. Milstein , A.A. Minaenko , M. Mi˜nano Moya , I.A. Minashvili , A.I. Mincer ,B. Mindur , M. Mineev , Y. Ming , L.M. Mir , G. Mirabelli , J. Mitrevski , V.A. Mitsou , S. Mitsui ,P.S. Miyagawa , J.U. Mj¨ornmark , T. Moa , , V. Moeller , K. M¨onig , N. M¨oser , S. Mohapatra ,W. Mohr , R. Moles-Valls , A. Molfetas , J. Monk , E. Monnier , J. Montejo Berlingen , F. Monticelli ,S. Monzani , , R.W. Moore , G.F. Moorhead , C. Mora Herrera , A. Moraes , N. Morange , J. Morel ,G. Morello , , D. Moreno , M. Moreno Ll´acer , P. Morettini , M. Morgenstern , M. Morii ,A.K. Morley , G. Mornacchi , J.D. Morris , L. Morvaj , H.G. Moser , M. Mosidze , J. Moss ,R. Mount , E. Mountricha ,y , S.V. Mouraviev , ∗ , E.J.W. Moyse , F. Mueller , J. Mueller , K. Mueller ,T.A. M¨uller , T. Mueller , D. Muenstermann , Y. Munwes , W.J. Murray , I. Mussche , E. Musto , ,A.G. Myagkov , M. Myska , O. Nackenhorst , J. Nadal , K. Nagai , R. Nagai , K. Nagano ,A. Nagarkar , Y. Nagasaka , M. Nagel , A.M. Nairz , Y. Nakahama , K. Nakamura , T. Nakamura ,I. Nakano , G. Nanava , A. Napier , R. Narayan , M. Nash ,c , T. Nattermann , T. Naumann ,G. Navarro , H.A. Neal , P.Yu. Nechaeva , T.J. Neep , A. Negri , , G. Negri , M. Negrini ,S. Nektarijevic , A. Nelson , T.K. Nelson , S. Nemecek , P. Nemethy , A.A. Nepomuceno , M. Nessi ,z ,M.S. Neubauer , M. Neumann , A. Neusiedl , R.M. Neves , P. Nevski , F.M. Newcomer , P.R. Newman ,V. Nguyen Thi Hong , R.B. Nickerson , R. Nicolaidou , B. Nicquevert , F. Niedercorn , J. Nielsen ,N. Nikiforou , A. Nikiforov , V. Nikolaenko , I. Nikolic-Audit , K. Nikolics , K. Nikolopoulos , H. Nilsen ,P. Nilsson , Y. Ninomiya , A. Nisati , R. Nisius , T. Nobe , L. Nodulman , M. Nomachi , I. Nomidis ,S. Norberg , M. Nordberg , P.R. Norton , J. Novakova , M. Nozaki , L. Nozka , I.M. Nugent ,A.-E. Nuncio-Quiroz , G. Nunes Hanninger , T. Nunnemann , E. Nurse , B.J. O’Brien , D.C. O’Neil ,V. O’Shea , L.B. Oakes , F.G. Oakham ,d , H. Oberlack , J. Ocariz , A. Ochi , S. Oda , S. Odaka ,J. Odier , H. Ogren , A. Oh , S.H. Oh , C.C. Ohm , T. Ohshima , W. Okamura , H. Okawa ,Y. Okumura , T. Okuyama , A. Olariu , A.G. Olchevski , S.A. Olivares Pino , M. Oliveira ,h ,D. Oliveira Damazio , E. Oliver Garcia , D. Olivito , A. Olszewski , J. Olszowska , J. Onderwaater ,A. Onofre ,aa , P.U.E. Onyisi , C.J. Oram , M.J. Oreglia , Y. Oren , D. Orestano , ,N. Orlando , , I. Orlov , C. Oropeza Barrera , R.S. Orr , B. Osculati , , R. Ospanov , C. Osuna ,G. Otero y Garzon , J.P. Ottersbach , M. Ouchrif , E.A. Ouellette , F. Ould-Saada , A. Ouraou ,Q. Ouyang , A. Ovcharova , M. Owen , S. Owen , V.E. Ozcan , N. Ozturk , A. Pacheco Pages ,C. Padilla Aranda , S. Pagan Griso , E. Paganis , C. Pahl , F. Paige , P. Pais , K. Pajchel ,1G. Palacino , C.P. Paleari , S. Palestini , D. Pallin , A. Palma , J.D. Palmer , Y.B. Pan ,E. Panagiotopoulou , J.G. Panduro Vazquez , P. Pani , N. Panikashvili , S. Panitkin , D. Pantea ,A. Papadelis , Th.D. Papadopoulou , A. Paramonov , D. Paredes Hernandez , W. Park ,ab , M.A. Parker ,F. Parodi , , J.A. Parsons , U. Parzefall , S. Pashapour , E. Pasqualucci , S. Passaggio , A. Passeri ,F. Pastore , , ∗ , Fr. Pastore , G. P´asztor ,ac , S. Pataraia , N. Patel , J.R. Pater , S. Patricelli , ,T. Pauly , M. Pecsy , S. Pedraza Lopez , M.I. Pedraza Morales , S.V. Peleganchuk , D. Pelikan ,H. Peng , B. Penning , A. Penson , J. Penwell , M. Perantoni , K. Perez ,ad , T. Perez Cavalcanti ,E. Perez Codina , M.T. P´erez Garc´ıa-Esta˜n , V. Perez Reale , L. Perini , , H. Pernegger , R. Perrino ,P. Perrodo , V.D. Peshekhonov , K. Peters , B.A. Petersen , J. Petersen , T.C. Petersen , E. Petit ,A. Petridis , C. Petridou , E. Petrolo , F. Petrucci , , D. Petschull , M. Petteni , R. Pezoa ,A. Phan , P.W. Phillips , G. Piacquadio , A. Picazio , E. Piccaro , M. Piccinini , , S.M. Piec ,R. Piegaia , D.T. Pignotti , J.E. Pilcher , A.D. Pilkington , J. Pina ,b , M. Pinamonti , , A. Pinder ,J.L. Pinfold , B. Pinto , C. Pizio , , M. Plamondon , M.-A. Pleier , E. Plotnikova , A. Poblaguev ,S. Poddar , F. Podlyski , L. Poggioli , D. Pohl , M. Pohl , G. Polesello , A. Policicchio , , A. Polini ,J. Poll , V. Polychronakos , D. Pomeroy , K. Pomm`es , L. Pontecorvo , B.G. Pope , G.A. Popeneciu ,D.S. Popovic , A. Poppleton , X. Portell Bueso , G.E. Pospelov , S. Pospisil , I.N. Potrap , C.J. Potter ,C.T. Potter , G. Poulard , J. Poveda , V. Pozdnyakov , R. Prabhu , P. Pralavorio , A. Pranko ,S. Prasad , R. Pravahan , S. Prell , K. Pretzl , D. Price , J. Price , L.E. Price , D. Prieur ,M. Primavera , K. Prokofiev , F. Prokoshin , S. Protopopescu , J. Proudfoot , X. Prudent ,M. Przybycien , H. Przysiezniak , S. Psoroulas , E. Ptacek , E. Pueschel , J. Purdham , M. Purohit ,ab ,P. Puzo , Y. Pylypchenko , J. Qian , A. Quadt , D.R. Quarrie , W.B. Quayle , F. Quinonez , M. Raas ,V. Radeka , V. Radescu , P. Radloff , T. Rador , F. Ragusa , , G. Rahal , A.M. Rahimi , D. Rahm ,S. Rajagopalan , M. Rammensee , M. Rammes , A.S. Randle-Conde , K. Randrianarivony , F. Rauscher ,T.C. Rave , M. Raymond , A.L. Read , D.M. Rebuzzi , , A. Redelbach , G. Redlinger , R. Reece ,K. Reeves , E. Reinherz-Aronis , A. Reinsch , I. Reisinger , C. Rembser , Z.L. Ren , A. Renaud ,M. Rescigno , S. Resconi , B. Resende , P. Reznicek , R. Rezvani , R. Richter , E. Richter-Was ,ae ,M. Ridel , M. Rijpstra , M. Rijssenbeek , A. Rimoldi , , L. Rinaldi , R.R. Rios , I. Riu ,G. Rivoltella , , F. Rizatdinova , E. Rizvi , S.H. Robertson ,k , A. Robichaud-Veronneau , D. Robinson ,J.E.M. Robinson , A. Robson , J.G. Rocha de Lima , C. Roda , , D. Roda Dos Santos , A. Roe ,S. Roe , O. Røhne , S. Rolli , A. Romaniouk , M. Romano , , G. Romeo , E. Romero Adam ,N. Rompotis , L. Roos , E. Ros , S. Rosati , K. Rosbach , A. Rose , M. Rose , G.A. Rosenbaum ,E.I. Rosenberg , P.L. Rosendahl , O. Rosenthal , L. Rosselet , V. Rossetti , E. Rossi , , L.P. Rossi ,M. Rotaru , I. Roth , J. Rothberg , D. Rousseau , C.R. Royon , A. Rozanov , Y. Rozen ,X. Ruan ,af , F. Rubbo , I. Rubinskiy , N. Ruckstuhl , V.I. Rud , C. Rudolph , G. Rudolph , F. R¨uhr ,A. Ruiz-Martinez , L. Rumyantsev , Z. Rurikova , N.A. Rusakovich , J.P. Rutherfoord , P. Ruzicka ,Y.F. Ryabov , M. Rybar , G. Rybkin , N.C. Ryder , A.F. Saavedra , I. Sadeh , H.F-W. Sadrozinski ,R. Sadykov , F. Safai Tehrani , H. Sakamoto , G. Salamanna , A. Salamon , M. Saleem , D. Salek ,D. Salihagic , A. Salnikov , J. Salt , B.M. Salvachua Ferrando , D. Salvatore , , F. Salvatore ,A. Salvucci , A. Salzburger , D. Sampsonidis , B.H. Samset , A. Sanchez , , V. Sanchez Martinez ,H. Sandaker , H.G. Sander , M.P. Sanders , M. Sandhoff , T. Sandoval , C. Sandoval , R. Sandstroem ,D.P.C. Sankey , A. Sansoni , C. Santamarina Rios , C. Santoni , R. Santonico , , H. Santos ,J.G. Saraiva , T. Sarangi , E. Sarkisyan-Grinbaum , F. Sarri , , G. Sartisohn , O. Sasaki ,Y. Sasaki , N. Sasao , I. Satsounkevitch , G. Sauvage , ∗ , E. Sauvan , J.B. Sauvan , P. Savard ,d ,V. Savinov , D.O. Savu , L. Sawyer ,m , D.H. Saxon , J. Saxon , C. Sbarra , A. Sbrizzi , ,D.A. Scannicchio , M. Scarcella , J. Schaarschmidt , P. Schacht , D. Schaefer , U. Sch¨afer ,A. Schaelicke , S. Schaepe , S. Schaetzel , A.C. Schaffer , D. Schaile , R.D. Schamberger ,A.G. Schamov , V. Scharf , V.A. Schegelsky , D. Scheirich , M. Schernau , M.I. Scherzer ,C. Schiavi , , J. Schieck , M. Schioppa , , S. Schlenker , E. Schmidt , K. Schmieden , C. Schmitt ,S. Schmitt , M. Schmitz , B. Schneider , U. Schnoor , L. Schoeffel , A. Schoening , A.L.S. Schorlemmer ,M. Schott , D. Schouten , J. Schovancova , M. Schram , C. Schroeder , N. Schroer , M.J. Schultens ,J. Schultes , H.-C. Schultz-Coulon , H. Schulz , M. Schumacher , B.A. Schumm , Ph. Schune ,C. Schwanenberger , A. Schwartzman , Ph. Schwegler , Ph. Schwemling , R. Schwienhorst , R. Schwierz ,J. Schwindling , T. Schwindt , M. Schwoerer , G. Sciolla , W.G. Scott , J. Searcy , G. Sedov ,E. Sedykh , S.C. Seidel , A. Seiden , F. Seifert , J.M. Seixas , G. Sekhniaidze , S.J. Sekula ,K.E. Selbach , D.M. Seliverstov , B. Sellden , G. Sellers , M. Seman , N. Semprini-Cesari , ,C. Serfon , L. Serin , L. Serkin , R. Seuster , H. Severini , A. Sfyrla , E. Shabalina , M. Shamim ,2L.Y. Shan , J.T. Shank , Q.T. Shao , M. Shapiro , P.B. Shatalov , K. Shaw , , D. Sherman ,P. Sherwood , S. Shimizu , M. Shimojima , T. Shin , M. Shiyakova , A. Shmeleva , M.J. Shochet ,D. Short , S. Shrestha , E. Shulga , M.A. Shupe , P. Sicho , A. Sidoti , F. Siegert , Dj. Sijacki ,O. Silbert , J. Silva , Y. Silver , D. Silverstein , S.B. Silverstein , V. Simak , O. Simard ,Lj. Simic , S. Simion , E. Simioni , B. Simmons , R. Simoniello , , M. Simonyan , P. Sinervo ,N.B. Sinev , V. Sipica , G. Siragusa , A. Sircar , A.N. Sisakyan , ∗ , S.Yu. Sivoklokov , J. Sj¨olin , ,T.B. Sjursen , L.A. Skinnari , H.P. Skottowe , K. Skovpen , P. Skubic , M. Slater , T. Slavicek ,K. Sliwa , V. Smakhtin , B.H. Smart , L. Smestad , S.Yu. Smirnov , Y. Smirnov , L.N. Smirnova ,O. Smirnova , B.C. Smith , D. Smith , K.M. Smith , M. Smizanska , K. Smolek , A.A. Snesarev ,S.W. Snow , J. Snow , S. Snyder , R. Sobie ,k , J. Sodomka , A. Soffer , C.A. Solans , M. Solar ,J. Solc , E.Yu. Soldatov , U. Soldevila , E. Solfaroli Camillocci , , A.A. Solodkov , O.V. Solovyanov ,V. Solovyev , N. Soni , V. Sopko , B. Sopko , M. Sosebee , R. Soualah , , A. Soukharev ,S. Spagnolo , , F. Span`o , R. Spighi , G. Spigo , R. Spiwoks , M. Spousta ,ag , T. Spreitzer ,B. Spurlock , R.D. St. Denis , J. Stahlman , R. Stamen , E. Stanecka , R.W. Stanek , C. Stanescu ,M. Stanescu-Bellu , M.M. Stanitzki , S. Stapnes , E.A. Starchenko , J. Stark , P. Staroba ,P. Starovoitov , R. Staszewski , A. Staude , P. Stavina , ∗ , G. Steele , P. Steinbach , P. Steinberg ,I. Stekl , B. Stelzer , H.J. Stelzer , O. Stelzer-Chilton , H. Stenzel , S. Stern , G.A. Stewart ,J.A. Stillings , M.C. Stockton , K. Stoerig , G. Stoicea , S. Stonjek , P. Strachota , A.R. Stradling ,A. Straessner , J. Strandberg , S. Strandberg , , A. Strandlie , M. Strang , E. Strauss ,M. Strauss , P. Strizenec , R. Str¨ohmer , D.M. Strom , J.A. Strong , ∗ , R. Stroynowski , B. Stugu ,I. Stumer , ∗ , J. Stupak , P. Sturm , N.A. Styles , D.A. Soh ,u , D. Su , HS. Subramania ,R. Subramaniam , A. Succurro , Y. Sugaya , C. Suhr , M. Suk , V.V. Sulin , S. Sultansoy , T. Sumida ,X. Sun , J.E. Sundermann , K. Suruliz , G. Susinno , , M.R. Sutton , Y. Suzuki , Y. Suzuki ,M. Svatos , S. Swedish , I. Sykora , T. Sykora , J. S´anchez , D. Ta , K. Tackmann , A. Taffard ,R. Tafirout , N. Taiblum , Y. Takahashi , H. Takai , R. Takashima , H. Takeda , T. Takeshita ,Y. Takubo , M. Talby , A. Talyshev ,f , M.C. Tamsett , J. Tanaka , R. Tanaka , S. Tanaka , S. Tanaka ,A.J. Tanasijczuk , K. Tani , N. Tannoury , S. Tapprogge , D. Tardif , S. Tarem , F. Tarrade ,G.F. Tartarelli , P. Tas , M. Tasevsky , E. Tassi , , M. Tatarkhanov , Y. Tayalati , C. Taylor ,F.E. Taylor , G.N. Taylor , W. Taylor , M. Teinturier , F.A. Teischinger , M. Teixeira Dias Castanheira ,P. Teixeira-Dias , K.K. Temming , H. Ten Kate , P.K. Teng , S. Terada , K. Terashi , J. Terron ,M. Testa , R.J. Teuscher ,k , J. Therhaag , T. Theveneaux-Pelzer , S. Thoma , J.P. Thomas ,E.N. Thompson , P.D. Thompson , P.D. Thompson , A.S. Thompson , L.A. Thomsen , E. Thomson ,M. Thomson , W.M. Thong , R.P. Thun , F. Tian , M.J. Tibbetts , T. Tic , V.O. Tikhomirov ,Y.A. Tikhonov ,f , S. Timoshenko , E. Tiouchichine , P. Tipton , S. Tisserant , T. Todorov ,S. Todorova-Nova , B. Toggerson , J. Tojo , S. Tok´ar , K. Tokushuku , K. Tollefson , M. Tomoto ,L. Tompkins , K. Toms , A. Tonoyan , C. Topfel , N.D. Topilin , I. Torchiani , E. Torrence , H. Torres ,E. Torr´o Pastor , J. Toth ,ac , F. Touchard , D.R. Tovey , T. Trefzger , L. Tremblet , A. Tricoli ,I.M. Trigger , S. Trincaz-Duvoid , M.F. Tripiana , N. Triplett , W. Trischuk , B. Trocm´e , C. Troncon ,M. Trottier-McDonald , M. Trzebinski , A. Trzupek , C. Tsarouchas , J.C-L. Tseng , M. Tsiakiris ,P.V. Tsiareshka , D. Tsionou ,ah , G. Tsipolitis , S. Tsiskaridze , V. Tsiskaridze , E.G. Tskhadadze ,I.I. Tsukerman , V. Tsulaia , J.-W. Tsung , S. Tsuno , D. Tsybychev , A. Tua , A. Tudorache ,V. Tudorache , J.M. Tuggle , M. Turala , D. Turecek , I. Turk Cakir , E. Turlay , R. Turra , ,P.M. Tuts , A. Tykhonov , M. Tylmad , , M. Tyndel , G. Tzanakos , K. Uchida , I. Ueda , R. Ueno ,M. Ugland , M. Uhlenbrock , M. Uhrmacher , F. Ukegawa , G. Unal , A. Undrus , G. Unel , Y. Unno ,D. Urbaniec , P. Urquijo , G. Usai , M. Uslenghi , , L. Vacavant , V. Vacek , B. Vachon , S. Vahsen ,J. Valenta , S. Valentinetti , , A. Valero , S. Valkar , E. Valladolid Gallego , S. Vallecorsa ,J.A. Valls Ferrer , R. Van Berg , P.C. Van Der Deijl , R. van der Geer , H. van der Graaf ,R. Van Der Leeuw , E. van der Poel , D. van der Ster , N. van Eldik , P. van Gemmeren , I. van Vulpen ,M. Vanadia , W. Vandelli , A. Vaniachine , P. Vankov , F. Vannucci , R. Vari , T. Varol , D. Varouchas ,A. Vartapetian , K.E. Varvell , V.I. Vassilakopoulos , F. Vazeille , T. Vazquez Schroeder , G. Vegni , ,J.J. Veillet , F. Veloso , R. Veness , S. Veneziano , A. Ventura , , D. Ventura , M. Venturi ,N. Venturi , V. Vercesi , M. Verducci , W. Verkerke , J.C. Vermeulen , A. Vest , M.C. Vetterli ,d ,I. Vichou , T. Vickey ,ai , O.E. Vickey Boeriu , G.H.A. Viehhauser , S. Viel , M. Villa , ,M. Villaplana Perez , E. Vilucchi , M.G. Vincter , E. Vinek , V.B. Vinogradov , M. Virchaux , ∗ , J. Virzi ,O. Vitells , M. Viti , I. Vivarelli , F. Vives Vaque , S. Vlachos , D. Vladoiu , M. Vlasak , A. Vogel ,P. Vokac , G. Volpi , M. Volpi , G. Volpini , H. von der Schmitt , H. von Radziewski , E. von Toerne ,3V. Vorobel , V. Vorwerk , M. Vos , R. Voss , T.T. Voss , J.H. Vossebeld , N. Vranjes ,M. Vranjes Milosavljevic , V. Vrba , M. Vreeswijk , T. Vu Anh , R. Vuillermet , I. Vukotic , W. Wagner ,P. Wagner , H. Wahlen , S. Wahrmund , J. Wakabayashi , S. Walch , J. Walder , R. Walker ,W. Walkowiak , R. Wall , P. Waller , B. Walsh , C. Wang , H. Wang , H. Wang ,aj , J. Wang ,J. Wang , R. Wang , S.M. Wang , T. Wang , A. Warburton , C.P. Ward , M. Warsinsky , A. Washbrook ,C. Wasicki , I. Watanabe , P.M. Watkins , A.T. Watson , I.J. Watson , M.F. Watson , G. Watts ,S. Watts , A.T. Waugh , B.M. Waugh , M.S. Weber , P. Weber , J.S. Webster , A.R. Weidberg ,P. Weigell , J. Weingarten , C. Weiser , P.S. Wells , T. Wenaus , D. Wendland , Z. Weng ,u , T. Wengler ,S. Wenig , N. Wermes , M. Werner , P. Werner , M. Werth , M. Wessels , J. Wetter , C. Weydert ,K. Whalen , S.J. Wheeler-Ellis , A. White , M.J. White , S. White , , S.R. Whitehead ,D. Whiteson , D. Whittington , F. Wicek , D. Wicke , F.J. Wickens , W. Wiedenmann , M. Wielers ,P. Wienemann , C. Wiglesworth , L.A.M. Wiik-Fuchs , P.A. Wijeratne , A. Wildauer , M.A. Wildt ,r ,I. Wilhelm , H.G. Wilkens , J.Z. Will , E. Williams , H.H. Williams , W. Willis , S. Willocq ,J.A. Wilson , M.G. Wilson , A. Wilson , I. Wingerter-Seez , S. Winkelmann , F. Winklmeier , M. Wittgen ,S.J. Wollstadt , M.W. Wolter , H. Wolters ,h , W.C. Wong , G. Wooden , B.K. Wosiek , J. Wotschack ,M.J. Woudstra , K.W. Wozniak , K. Wraight , M. Wright , B. Wrona , S.L. Wu , X. Wu , Y. Wu ,ak ,E. Wulf , B.M. Wynne , S. Xella , M. Xiao , S. Xie , C. Xu ,y , D. Xu , B. Yabsley , S. Yacoob ,al ,M. Yamada , H. Yamaguchi , A. Yamamoto , K. Yamamoto , S. Yamamoto , T. Yamamura ,T. Yamanaka , T. Yamazaki , Y. Yamazaki , Z. Yan , H. Yang , U.K. Yang , Y. Yang , Z. Yang , ,S. Yanush , L. Yao , Y. Yao , Y. Yasu , G.V. Ybeles Smit , J. Ye , S. Ye , M. Yilmaz , R. Yoosoofmiya ,K. Yorita , R. Yoshida , K. Yoshihara , C. Young , C.J. Young , S. Youssef , D. Yu , J. Yu , J. Yu ,L. Yuan , A. Yurkewicz , M. Byszewski , B. Zabinski , R. Zaidan , A.M. Zaitsev , Z. Zajacova ,L. Zanello , , D. Zanzi , A. Zaytsev , C. Zeitnitz , M. Zeman , A. Zemla , C. Zendler , O. Zenin ,T. ˇZeniˇs , Z. Zinonos , , S. Zenz , D. Zerwas , G. Zevi della Porta , D. Zhang ,aj , H. Zhang ,J. Zhang , X. Zhang , Z. Zhang , L. Zhao , Z. Zhao , A. Zhemchugov , J. Zhong , B. Zhou ,N. Zhou , Y. Zhou , C.G. Zhu , H. Zhu , J. Zhu , Y. Zhu , X. Zhuang , V. Zhuravlov , D. Zieminska ,N.I. Zimin , R. Zimmermann , S. Zimmermann , S. Zimmermann , M. Ziolkowski , R. Zitoun , L. ˇZivkovi´c ,V.V. Zmouchko , ∗ , G. Zobernig , A. Zoccoli , , M. zur Nedden , V. Zutshi , L. Zwalinski . School of Chemistry and Physics, University of Adelaide, Adelaide, Australia Physics Department, SUNY Albany, Albany NY, United States of America Department of Physics, University of Alberta, Edmonton AB, Canada a ) Department of Physics, Ankara University, Ankara; ( b ) Department of Physics, Dumlupinar University, Kutahya; ( c ) Department of Physics, Gazi University, Ankara; ( d ) Division of Physics, TOBB University of Economics andTechnology, Ankara; ( e ) Turkish Atomic Energy Authority, Ankara, Turkey LAPP, CNRS/IN2P3 and Universit´e de Savoie, Annecy-le-Vieux, France High Energy Physics Division, Argonne National Laboratory, Argonne IL, United States of America Department of Physics, University of Arizona, Tucson AZ, United States of America Department of Physics, The University of Texas at Arlington, Arlington TX, United States of America Physics Department, University of Athens, Athens, Greece Physics Department, National Technical University of Athens, Zografou, Greece Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan Institut de F´ısica d’Altes Energies and Departament de F´ısica de la Universitat Aut`onoma de Barcelona andICREA, Barcelona, Spain 13 ( a ) Institute of Physics, University of Belgrade, Belgrade; ( b ) Vinca Institute of Nuclear Sciences, University ofBelgrade, Belgrade, Serbia Department for Physics and Technology, University of Bergen, Bergen, Norway Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley CA, UnitedStates of America Department of Physics, Humboldt University, Berlin, Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern,Bern, Switzerland School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom 19 ( a ) Department of Physics, Bogazici University, Istanbul; ( b ) Division of Physics, Dogus University, Istanbul; ( c ) Department of Physics Engineering, Gaziantep University, Gaziantep; ( d ) Department of Physics, IstanbulTechnical University, Istanbul, Turkey4 20 ( a ) INFN Sezione di Bologna; ( b ) Dipartimento di Fisica, Universit`a di Bologna, Bologna, Italy Physikalisches Institut, University of Bonn, Bonn, Germany Department of Physics, Boston University, Boston MA, United States of America Department of Physics, Brandeis University, Waltham MA, United States of America 24 ( a ) Universidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro; ( b ) Federal University of Juiz de Fora(UFJF), Juiz de Fora; ( c ) Federal University of Sao Joao del Rei (UFSJ), Sao Joao del Rei; ( d ) Instituto de Fisica,Universidade de Sao Paulo, Sao Paulo, Brazil Physics Department, Brookhaven National Laboratory, Upton NY, United States of America 26 ( a ) National Institute of Physics and Nuclear Engineering, Bucharest; ( b ) University Politehnica Bucharest,Bucharest; ( c ) West University in Timisoara, Timisoara, Romania Departamento de F´ısica, Universidad de Buenos Aires, Buenos Aires, Argentina Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom Department of Physics, Carleton University, Ottawa ON, Canada CERN, Geneva, Switzerland Enrico Fermi Institute, University of Chicago, Chicago IL, United States of America 32 ( a ) Departamento de F´ısica, Pontificia Universidad Cat´olica de Chile, Santiago; ( b ) Departamento de F´ısica,Universidad T´ecnica Federico Santa Mar´ıa, Valpara´ıso, Chile 33 ( a ) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; ( b ) Department of Modern Physics,University of Science and Technology of China, Anhui; ( c ) Department of Physics, Nanjing University, Jiangsu; ( d ) School of Physics, Shandong University, Shandong, China Laboratoire de Physique Corpusculaire, Clermont Universit´e and Universit´e Blaise Pascal and CNRS/IN2P3,Clermont-Ferrand, France Nevis Laboratory, Columbia University, Irvington NY, United States of America Niels Bohr Institute, University of Copenhagen, Kobenhavn, Denmark 37 ( a ) INFN Gruppo Collegato di Cosenza; ( b ) Dipartimento di Fisica, Universit`a della Calabria, Arcavata di Rende,Italy AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland Physics Department, Southern Methodist University, Dallas TX, United States of America Physics Department, University of Texas at Dallas, Richardson TX, United States of America DESY, Hamburg and Zeuthen, Germany Institut f¨ur Experimentelle Physik IV, Technische Universit¨at Dortmund, Dortmund, Germany Institut f¨ur Kern-und Teilchenphysik, Technical University Dresden, Dresden, Germany Department of Physics, Duke University, Durham NC, United States of America SUPA - School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom INFN Laboratori Nazionali di Frascati, Frascati, Italy Fakult¨at f¨ur Mathematik und Physik, Albert-Ludwigs-Universit¨at, Freiburg, Germany Section de Physique, Universit´e de Gen`eve, Geneva, Switzerland 50 ( a ) INFN Sezione di Genova; ( b ) Dipartimento di Fisica, Universit`a di Genova, Genova, Italy 51 ( a ) E. Andronikashvili Institute of Physics, Tbilisi State University, Tbilisi; ( b ) High Energy Physics Institute,Tbilisi State University, Tbilisi, Georgia II Physikalisches Institut, Justus-Liebig-Universit¨at Giessen, Giessen, Germany SUPA - School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom II Physikalisches Institut, Georg-August-Universit¨at, G¨ottingen, Germany Laboratoire de Physique Subatomique et de Cosmologie, Universit´e Joseph Fourier and CNRS/IN2P3 andInstitut National Polytechnique de Grenoble, Grenoble, France Department of Physics, Hampton University, Hampton VA, United States of America Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge MA, United States of America 58 ( a ) Kirchhoff-Institut f¨ur Physik, Ruprecht-Karls-Universit¨at Heidelberg, Heidelberg; ( b ) Physikalisches Institut,Ruprecht-Karls-Universit¨at Heidelberg, Heidelberg; ( c ) ZITI Institut f¨ur technische Informatik,Ruprecht-Karls-Universit¨at Heidelberg, Mannheim, Germany Faculty of Applied Information Science, Hiroshima Institute of Technology, Hiroshima, Japan Department of Physics, Indiana University, Bloomington IN, United States of America Institut f¨ur Astro-und Teilchenphysik, Leopold-Franzens-Universit¨at, Innsbruck, Austria University of Iowa, Iowa City IA, United States of America Department of Physics and Astronomy, Iowa State University, Ames IA, United States of America5 Joint Institute for Nuclear Research, JINR Dubna, Dubna, Russia KEK, High Energy Accelerator Research Organization, Tsukuba, Japan Graduate School of Science, Kobe University, Kobe, Japan Faculty of Science, Kyoto University, Kyoto, Japan Kyoto University of Education, Kyoto, Japan Department of Physics, Kyushu University, Fukuoka, Japan Instituto de F´ısica La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina Physics Department, Lancaster University, Lancaster, United Kingdom 72 ( a ) INFN Sezione di Lecce; ( b ) Dipartimento di Matematica e Fisica, Universit`a del Salento, Lecce, Italy Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom Department of Physics, Joˇzef Stefan Institute and University of Ljubljana, Ljubljana, Slovenia School of Physics and Astronomy, Queen Mary University of London, London, United Kingdom Department of Physics, Royal Holloway University of London, Surrey, United Kingdom Department of Physics and Astronomy, University College London, London, United Kingdom Laboratoire de Physique Nucl´eaire et de Hautes Energies, UPMC and Universit´e Paris-Diderot andCNRS/IN2P3, Paris, France Fysiska institutionen, Lunds universitet, Lund, Sweden Departamento de Fisica Teorica C-15, Universidad Autonoma de Madrid, Madrid, Spain Institut f¨ur Physik, Universit¨at Mainz, Mainz, Germany School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom CPPM, Aix-Marseille Universit´e and CNRS/IN2P3, Marseille, France Department of Physics, University of Massachusetts, Amherst MA, United States of America Department of Physics, McGill University, Montreal QC, Canada School of Physics, University of Melbourne, Victoria, Australia Department of Physics, The University of Michigan, Ann Arbor MI, United States of America Department of Physics and Astronomy, Michigan State University, East Lansing MI, United States of America 89 ( a ) INFN Sezione di Milano; ( b ) Dipartimento di Fisica, Universit`a di Milano, Milano, Italy B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Republic of Belarus National Scientific and Educational Centre for Particle and High Energy Physics, Minsk, Republic of Belarus Department of Physics, Massachusetts Institute of Technology, Cambridge MA, United States of America Group of Particle Physics, University of Montreal, Montreal QC, Canada P.N. Lebedev Institute of Physics, Academy of Sciences, Moscow, Russia Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia Moscow Engineering and Physics Institute (MEPhI), Moscow, Russia Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia Fakult¨at f¨ur Physik, Ludwig-Maximilians-Universit¨at M¨unchen, M¨unchen, Germany Max-Planck-Institut f¨ur Physik (Werner-Heisenberg-Institut), M¨unchen, Germany Nagasaki Institute of Applied Science, Nagasaki, Japan Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan 102 ( a ) INFN Sezione di Napoli; ( b ) Dipartimento di Scienze Fisiche, Universit`a di Napoli, Napoli, Italy Department of Physics and Astronomy, University of New Mexico, Albuquerque NM, United States of America Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen,Netherlands Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, Netherlands Department of Physics, Northern Illinois University, DeKalb IL, United States of America Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia Department of Physics, New York University, New York NY, United States of America Ohio State University, Columbus OH, United States of America Faculty of Science, Okayama University, Okayama, Japan Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman OK, United States ofAmerica Department of Physics, Oklahoma State University, Stillwater OK, United States of America Palack´y University, RCPTM, Olomouc, Czech Republic Center for High Energy Physics, University of Oregon, Eugene OR, United States of America LAL, Universit´e Paris-Sud and CNRS/IN2P3, Orsay, France Graduate School of Science, Osaka University, Osaka, Japan6 Department of Physics, University of Oslo, Oslo, Norway Department of Physics, Oxford University, Oxford, United Kingdom 119 ( a ) INFN Sezione di Pavia; ( b ) Dipartimento di Fisica, Universit`a di Pavia, Pavia, Italy Department of Physics, University of Pennsylvania, Philadelphia PA, United States of America Petersburg Nuclear Physics Institute, Gatchina, Russia 122 ( a ) INFN Sezione di Pisa; ( b ) Dipartimento di Fisica E. Fermi, Universit`a di Pisa, Pisa, Italy Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh PA, United States of America 124 ( a ) Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP, Lisboa, Portugal; ( b ) Departamentode Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada, Spain Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic Faculty of Mathematics and Physics, Charles University in Prague, Praha, Czech Republic Czech Technical University in Prague, Praha, Czech Republic State Research Center Institute for High Energy Physics, Protvino, Russia Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom Physics Department, University of Regina, Regina SK, Canada Ritsumeikan University, Kusatsu, Shiga, Japan 132 ( a ) INFN Sezione di Roma I; ( b ) Dipartimento di Fisica, Universit`a La Sapienza, Roma, Italy 133 ( a ) INFN Sezione di Roma Tor Vergata; ( b ) Dipartimento di Fisica, Universit`a di Roma Tor Vergata, Roma, Italy 134 ( a ) INFN Sezione di Roma Tre; ( b ) Dipartimento di Fisica, Universit`a Roma Tre, Roma, Italy 135 ( a ) Facult´e des Sciences Ain Chock, R´eseau Universitaire de Physique des Hautes Energies - Universit´e Hassan II,Casablanca; ( b ) Centre National de l’Energie des Sciences Techniques Nucleaires, Rabat; ( c ) Facult´e des SciencesSemlalia, Universit´e Cadi Ayyad, LPHEA-Marrakech; ( d ) Facult´e des Sciences, Universit´e Mohamed Premier andLPTPM, Oujda; ( e ) Facult´e des sciences, Universit´e Mohammed V-Agdal, Rabat, Morocco DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers), CEA Saclay (Commissariat al’Energie Atomique), Gif-sur-Yvette, France Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz CA, United States ofAmerica Department of Physics, University of Washington, Seattle WA, United States of America Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom Department of Physics, Shinshu University, Nagano, Japan Fachbereich Physik, Universit¨at Siegen, Siegen, Germany Department of Physics, Simon Fraser University, Burnaby BC, Canada SLAC National Accelerator Laboratory, Stanford CA, United States of America 144 ( a ) Faculty of Mathematics, Physics & Informatics, Comenius University, Bratislava; ( b ) Department of SubnuclearPhysics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic 145 ( a ) Department of Physics, University of Johannesburg, Johannesburg; ( b ) School of Physics, University of theWitwatersrand, Johannesburg, South Africa 146 ( a ) Department of Physics, Stockholm University; ( b ) The Oskar Klein Centre, Stockholm, Sweden Physics Department, Royal Institute of Technology, Stockholm, Sweden Departments of Physics & Astronomy and Chemistry, Stony Brook University, Stony Brook NY, United Statesof America Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom School of Physics, University of Sydney, Sydney, Australia Institute of Physics, Academia Sinica, Taipei, Taiwan Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo,Tokyo, Japan Graduate School of Science and Technology, Tokyo Metropolitan University, Tokyo, Japan Department of Physics, Tokyo Institute of Technology, Tokyo, Japan Department of Physics, University of Toronto, Toronto ON, Canada 159 ( a ) TRIUMF, Vancouver BC; ( b ) Department of Physics and Astronomy, York University, Toronto ON, Canada Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan Department of Physics and Astronomy, Tufts University, Medford MA, United States of America Centro de Investigaciones, Universidad Antonio Narino, Bogota, Colombia7 Department of Physics and Astronomy, University of California Irvine, Irvine CA, United States of America 164 ( a ) INFN Gruppo Collegato di Udine; ( b ) ICTP, Trieste; ( c ) Dipartimento di Chimica, Fisica e Ambiente, Universit`adi Udine, Udine, Italy Department of Physics, University of Illinois, Urbana IL, United States of America Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden Instituto de F´ısica Corpuscular (IFIC) and Departamento de F´ısica At´omica, Molecular y Nuclear andDepartamento de Ingenier´ıa Electr´onica and Instituto de Microelectr´onica de Barcelona (IMB-CNM), University ofValencia and CSIC, Valencia, Spain Department of Physics, University of British Columbia, Vancouver BC, Canada Department of Physics and Astronomy, University of Victoria, Victoria BC, Canada Department of Physics, University of Warwick, Coventry, United Kingdom Waseda University, Tokyo, Japan Department of Particle Physics, The Weizmann Institute of Science, Rehovot, Israel Department of Physics, University of Wisconsin, Madison WI, United States of America Fakult¨at f¨ur Physik und Astronomie, Julius-Maximilians-Universit¨at, W¨urzburg, Germany Fachbereich C Physik, Bergische Universit¨at Wuppertal, Wuppertal, Germany Department of Physics, Yale University, New Haven CT, United States of America Yerevan Physics Institute, Yerevan, Armenia Centre de Calcul de l’Institut National de Physique Nucl´eaire et de Physique des Particules (IN2P3),Villeurbanne, France a Also at Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP, Lisboa, Portugal b Also at Faculdade de Ciencias and CFNUL, Universidade de Lisboa, Lisboa, Portugal c Also at Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom d Also at TRIUMF, Vancouver BC, Canada e Also at Department of Physics, California State University, Fresno CA, United States of America f Also at Novosibirsk State University, Novosibirsk, Russia g Also at Fermilab, Batavia IL, United States of America h Also at Department of Physics, University of Coimbra, Coimbra, Portugal i Also at Department of Physics, UASLP, San Luis Potosi, Mexico j Also at Universit`a di Napoli Parthenope, Napoli, Italy k Also at Institute of Particle Physics (IPP), Canada l Also at Department of Physics, Middle East Technical University, Ankara, Turkey m Also at Louisiana Tech University, Ruston LA, United States of America n Also at Dep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica,Portugal o Also at Department of Physics and Astronomy, University College London, London, United Kingdom p Also at Department of Physics, University of Cape Town, Cape Town, South Africa q Also at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan r Also at Institut f¨ur Experimentalphysik, Universit¨at Hamburg, Hamburg, Germany s Also at Manhattan College, New York NY, United States of America t Also at CPPM, Aix-Marseille Universit´e and CNRS/IN2P3, Marseille, France u Also at School of Physics and Engineering, Sun Yat-sen University, Guanzhou, China v Also at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan w Also at School of Physics, Shandong University, Shandong, China x Also at Dipartimento di Fisica, Universit`a La Sapienza, Roma, Italy y Also at DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers), CEA Saclay (Commissariata l’Energie Atomique), Gif-sur-Yvette, France z Also at Section de Physique, Universit´e de Gen`eve, Geneva, Switzerland aa Also at Departamento de Fisica, Universidade de Minho, Braga, Portugal ab Also at Department of Physics and Astronomy, University of South Carolina, Columbia SC, United States ofAmerica ac Also at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary ad Also at California Institute of Technology, Pasadena CA, United States of America ae Also at Institute of Physics, Jagiellonian University, Krakow, Poland af Also at LAL, Universit´e Paris-Sud and CNRS/IN2P3, Orsay, France ag Also at Nevis Laboratory, Columbia University, Irvington NY, United States of America8 ah Also at Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom ai Also at Department of Physics, Oxford University, Oxford, United Kingdom aj Also at Institute of Physics, Academia Sinica, Taipei, Taiwan ak Also at Department of Physics, The University of Michigan, Ann Arbor MI, United States of America al Also at Discipline of Physics, University of KwaZulu-Natal, Durban, South Africa ∗∗