Upsilon (nS) polarizations versus particle multiplicity in pp collisions at root s=7 TeV

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Physics

Letters

B

www.elsevier.com/locate/physletb

ϒ (nS)

polarizations

versus

particle

multiplicity

in

pp

collisions

at

√

s

=

7 TeV

Receivedinrevisedform5July2016 Accepted26July2016

Availableonline2August2016 Editor:M.Doser Keywords: CMS Physics Quarkoniumproduction Quarkoniumpolarization QCDmediumeffects

The polarizationsofthe ϒ(1S),ϒ(2S),and ϒ(3S) mesonsaremeasured asafunctionofthecharged particlemultiplicityinproton–protoncollisionsat√s=7 TeV.Themeasurementsareperformedwitha dimuondatasamplecollectedin2011bytheCMSexperiment,correspondingtoanintegratedluminosity of 4.9 fb−1_{.The results are extracted fromthe dimuon decayangulardistributions, intwo ranges of}

ϒ(nS)transversemomentum(10–15and15–35 GeV),andintherapidityinterval|y|<1.2.Theresults donotshowsignificantchangesfromlow- tohigh-multiplicityppcollisions,althoughlargeuncertainties precludedefinitestatementsintheϒ(2S)andϒ(3S)cases.

©2016TheAuthor(s).PublishedbyElsevierB.V.ThisisanopenaccessarticleundertheCCBYlicense (http://creativecommons.org/licenses/by/4.0/).FundedbySCOAP3.

1. Introduction

Studiesof heavy-quarkonium production contribute to an im-proved understanding of hadron formation within the context of quantum chromodynamics (QCD) [1]. Quarkonium production is expected to proceed in two steps [2]. First, a heavy quark– antiquark pair, QQ, is produced, with angular momentum L and

spinS.Thenthis“pre-resonance”bindsintothemeasured quarko-niumstate through a nonperturbativeevolution that maychange

L and/or S. The short-distance QQ production cross sections are functionsof the QQ momentum andare calculated in perturba-tive QCD [3–6], while the probabilities that QQ pairs of differ-entquantum properties formthe observed quarkonium state are parametrizedbymomentum-independentlong-distancematrix el-ements(LDMEs). Sincethey areexpectedtoscalewithpowersof the heavy-quark velocity squared, v2, in the nonrelativistic limit (v21)mostLDMEsarenegligibleandS-wave vectorquarkonia shouldbe dominantlyformedfromQQ pairs producedas colour-singlet,3S[₁1],or asone of the 1S₀[8], 3S[₁8] and 3P[_J8] colour-octet states.Whilethe colour-singletLDME can be calculatedwith po-tential models, the others, reflecting the complexity of the evo-lution of a coloured QCD systeminto a formed hadron, are de-terminedthroughphenomenologicalanalyses ofquarkonium pro-duction data[3–7].Polarization data play a central role inthese

 _{E-mailaddress:cms-publication-committee-chair@cern.ch.}

analyses [7], whichare performedin the zero-momentumframe ofthequarkonium state(and,approximately,oftheQQ pair)and can directly reveal the quantum properties ofthe QQ, relying in mostcasesonly on basicangular-momentumanalysis. For exam-ple,1_S[8]

0 QQ states evolveinto unpolarized3S1 quarkonia, while 3_S[8]

1 states,withquantumnumbersidenticaltothoseofagluon, leadtotransverselypolarized3S1quarkonia.

The factorization hypothesis of nonrelativistic QCD implicitly assumes that the LDMEs are universal constants, independent of the short-distance process thatcreated the QQ:thesame LDMEs should be extractedfromproton–(anti)protonande+e− data,for example.However,crosssectionandpolarizationmeasurementsat hightransversemomentum, pT,are currentlylimitedtopp colli-sions,sothattheLDMEuniversalityhypothesisremainsa nontriv-ial assumption requiring direct experimental investigation. Since thenonperturbativequarkonium formationprocessinvolves inter-actionswiththeQCDmedium surroundingtheQQ state,allowing it to neutralize its net colour through emission orabsorption of softgluons, itis important toverify ifthe polarizations(directly relatedto theLDMEs) dependon thecomplexity ofthe hadronic environment createdby the collision.Probingifthe polarizations are affected by an increase in the multiplicity of particles pro-ducedinpp collisions, thetopicofthepresentanalysis, isafirst stepinsuchastudy,tobefollowedbyanalogousinvestigations us-ingproton–nucleusandnucleus–nucleusdatacollectedatdifferent collisioncentralities.Suchstudiesarecrucialforareliable interpre-tationofthequarkoniumsuppressionpatternsseeninhigh-energy

http://dx.doi.org/10.1016/j.physletb.2016.07.065

0370-2693/©2016TheAuthor(s).PublishedbyElsevierB.V.ThisisanopenaccessarticleundertheCCBYlicense(http://creativecommons.org/licenses/by/4.0/).Fundedby SCOAP3_.

nuclearcollisions(seeRef.[8]andreferencestherein)andoftheir relation to signatures of quark–gluon plasma formation [9–11]. Whilechangesinintegratedyields orinpTandrapidity,y, distri-butionscanbecausedbyeffectssuchasmodifiedpartondensities inthenucleusorpartonenergyloss,theobservationofchangesin quarkoniumpolarizationwouldbeadirectsignalofamodification inthebound-stateformationmechanism.

ThisLetterreportshowthe polarizationsoftheϒ(1S),ϒ(2S), andϒ(3S) mesons producedin pp collisionsata centre-of-mass energy of 7 TeV change as a function of charged particle mul-tiplicity, Nch. It complementstwo observations made forpp and pPbcollisions [12]: theϒ(nS)crosssections,normalisedby their

Nch-integrated values, increase with Nch; the ϒ(2S) and ϒ(3S) crosssections,normalisedbytheϒ(1S)value,decreasewithNch.

The measurements are performed using a dimuon data sam-ple collected in 2011 by the CMS experiment at the CERN LHC, correspondingto anintegratedluminosity of4.9 fb−1,andfollow theanalysismethodusedintheNch-integratedmeasurement[13]. The dimuonmassdistribution isused toseparate the ϒ(nS) sig-nalsfromeachotherandfrommuonpairsduetootherprocesses, such asdecaysofheavy flavour mesons. Theϒ(nS) polarizations arecharacterizedthrough threeparameters, λ = (λϑ,λϕ,λϑϕ),

re-flecting the anisotropy of the angular distribution of the decay muons[14],

W(cosϑ,ϕ|λ) ∝ 1

(3+ λϑ)(1+ λϑcos

2_ϑ+

+ λϕsin2ϑcos 2ϕ+ λϑϕsin 2ϑcosϕ),

(1)

where ϑ and ϕ arethe polarand azimuthal angles,respectively, ofthe μ+.Theseλparameters,aswellastheframe-invariant pa-rameter˜λ = (λϑ+3λϕ)/(1− λϕ)[15],aremeasuredinthe

centre-of-masshelicityframe (HX),where the z axiscoincides withthe direction of the ϒ momentum. The y axis of the polarization frame is reversed betweenpositive and negative rapidity, a defi-nitionthatavoidsthecancellationofλϑϕ whenintegratingevents

overasymmetricalrangeinrapidity.ThisisexplainedinRef.[16], which provides a pedagogical introduction to quarkonium polar-ization physics. As in the previous CMS quarkonium polarization measurements [13,17], the analysis is exclusively based on mea-sureddata:the3-momentumvectorsofthetwomuons (contain-ingthespinalignmentinformationofthedecayingϒ(nS)mesons) andthemuondetectionefficiencies.

2. CMSdetectoranddataanalysis

TheCMSapparatusis basedona superconductingsolenoidof 6 minternaldiameter,providinga3.8 Tfield.Withinthesolenoid volumeareasiliconpixelandstriptracker,aleadtungstate crys-talelectromagneticcalorimeter,andabrassandscintillatorhadron calorimeter. Muons are measured withdrift tubes, cathode strip chambers, andresistive-plate chambers. The main detectorsused inthisanalysisarethesilicontrackerandthemuonsystem,which enable the measurement of muon momenta over the pseudora-pidity range |η|<2.4. A more detailed description of the CMS detector,togetherwitha definitionofthecoordinatesystemused and the relevant kinematic variables, can be found in Ref. [18]. The events were collected using a two-level trigger system. The firstlevel usescustom hardware processors toselect eventswith two muons. The high-level trigger, adding information from the silicontracker,selectsopposite-signmuonpairsofinvariantmass 8.5<M<11.5 GeV,|y|<1.25 and pT>5 or 7 GeV (depending ontheinstantaneousluminosity);thedimuonvertexfit χ2 prob-abilitymustexceed0.5%andthetwomuonsmusthaveadistance ofclosestapproachsmallerthan5 mm.Althoughthetriggerlogic

Fig. 1. Charged particlemultiplicitydistributionoftheeventsselectedforthe anal-ysis.

doesnotrejecteventsonthebasisofthe pT ofthesinglemuons, at mid-rapidity the bending induced by the magnetic field pre-ventsmuonsof pT smallerthan∼3 GeVfromreaching themuon stations.

Theofflineanalysisselectsmuontrackswithhitsinmorethan tentrackerlayers,atleasttwoofwhichareinthepixellayers,and matched withsegments in the muon system. They must have a good trackfit quality, point tothe interaction region, andmatch the muon objects that triggered the event. The selected muons are required to satisfy |η|<1.6 and to have pT above 4.5, 3.5, and 3 GeV for|η|<1.2, 1.2<|η|<1.4,and 1.4<|η|<1.6, re-spectively,toensurereliabledetectionandtriggerefficiencies.The combinatorialbackgroundfromuncorrelatedmuonsissuppressed byrequiringadimuonvertexfit χ2 _{probabilitylargerthan1%and} by rejecting events wherethe distancebetweenthe dimuon ver-tex andthe primary vertexis larger than twice its resolution.In events withmultiple reconstructed primary vertices (pileup),the onenearesttothepointofclosestapproachbetweenthetrajectory ofthe dimuonandthe beamline isselected.The Nch variableis computedbycounting“highpurity”[19]chargedtracks,excluding thetwomuons,of|η|<2.4,pT>500 MeV,andpTmeasuredwith better than 10% relative accuracy. Acceptance andreconstruction efficiencies are not correctedfor. Eachtrackis assigneda weight reflectingthelikelihoodthatitbelongstotheprimaryvertex[19]; tracksconsistentwiththevertexhaveaweightclosetounity.The migration ofevents fromone Nch bin tothe next, causedby in-advertently counting spurious tracks produced in near-by pileup vertices,is keptnegligibleby rejecting eventswithmore than16 vertices.Fig. 1showstheNchdistributionoftheeventsselectedin thisanalysis.

The dimuon mass distribution, shown in Fig. 2, is well de-scribed by three Crystal-Ball functions[20],one per ϒ(nS) peak, and a second-order polynomial function representing the under-lying continuum, determined from the mass sidebands, 8.6–8.9 and 10.6–11.4 GeV. The dimuon mass resolution is σ≈80 MeV, slightly dependent on pT. The ϒ(nS) signal mass regions are defined as the ±1 σ windows around the fitted means of the Crystal-Ball functions. The corresponding cross-feed between the three peaks is negligible. The analysis is performed in five Nch bins, 0–10, 10–20, 20–30, 30–40, and40–60, sufficiently numer-ous andnarrowtoprobepotential variationsofthepolarizations, andintwoϒ(nS) pT ranges,10–15and15–35 GeV.Thedimuons are integrated within |y|<1.2.The lower pT ϒ(3S) polarization

Fig. 2. Dimuon mass distributions in theϒ(nS)region for two pTranges. measurement merges the two highest Nch bins, to reduce the background-relatedsystematicuncertainties.InthelowestNchbin, thebackground fractionsin thesignal massregions, fBg,are ap-proximately 3%, 7%, and 10% for the ϒ(1S), ϒ(2S), and ϒ(3S), respectively.The corresponding valuesinthe highestNch binare ∼4and∼2.5timeshigherinthe10–15and15–35 GeVpTranges, respectively. All analysis bins have signal yields sufficiently high fora reliablemeasurement,theworst casebeingthe2300ϒ(3S)

eventsinthehighestNchbinathighpT.Allsignalyieldsand back-groundfractionsaretabulatedinthesupplementalmaterial.

The single-muon detection efficiencies are measured with a “tag-and-probe”technique[21],usingeventsamplescollectedwith triggersspecificallydesignedforthispurpose,includinga sample enrichedindimuonsfrom J/ψdecayswhereamuoniscombined withanother trackand thepair is required to havean invariant mass within 2.8–3.4 GeV. The procedure was validatedwith de-tailed Monte Carlo simulation studies. The measured efficiencies areparametrizedasafunctionofmuon pT,ineight|η|bins.Their uncertainties,∼2–3%,reflectingthestatisticalprecision ofthe cal-ibration samples and possible imperfections of the parametriza-tion, are independent of Nch and identical for the three ϒ(nS) states.Theseglobaluncertainties donotaffectthesearchfor poten-tialvariations ofthe polarizations fromlow- to high-multiplicity events.Thetriggerandthe selectioncriteriacould potentially in-troducedifferencesbetweenthedimuondetectionefficienciesand theproductoftheefficienciesofthetwosinglemuons.Simulation studiesreveal thatsuchcorrelationshaveanegligibledependence oncosϑand ϕ,inthephasespaceofthisanalysis[13].The resid-ualangulardependencesareaccountedforintheevaluationofthe globalsystematicuncertainties.

3. Extractionofthepolarizationparameters

The two-dimensional angular distribution, in cosϑ and ϕ, of the background corresponding to a given ϒ(nS) state is eval-uated as a weighted average of the distributions measured in thetwo masssidebands, theweights reflecting (linearly) the dif-ferences between the ϒ(nS) mass and the median masses of the sidebands. The background component is subtracted on an event-by-event basis using a likelihood-ratio criterion, randomly selecting and removing a fraction fBg of events distributed ac-cordingtothe(pT,|y|,M,cosϑ, ϕ)distributionofthebackground model[13].Theposteriorprobabilitydensity(PPD)fortheaverage valuesoftheϒ(nS)polarizationparameters(λ)insideaparticular

Fig. 3. Distributions ofcosϑ(top)andϕ(bottom),forthe ϒ(2S)inarepresentative analysisbin.Thecurvesrepresenttwopolarizationscenarios(dashedanddotted lines,definedinthelegends)andthemeasuredcase(solidlines: λϑ=0.237, λϕ=

−0.027, λϑϕ= −0.025).

bin isthen defined asa product overthe remaining (signal-like) events i,

P(λ)=

i

E(p₁(i),p₂(i)), (2)

whereE representstheeventprobabilitydistributionasafunction ofthemuonmomenta p1,2 ineventi.Thisanalysismethoddoes not usemodel-dependent(cosϑ, ϕ)acceptancemaps;each event isattributedaprobabilityreflecting thefulleventkinematics(not onlycosϑ and ϕ)andthevaluesofthepolarizationparameters,

E(p1,p2)= 1

N(λ)W(cosϑ,ϕ|λ)(p1,p2), (3)

where (p1,p2)isthemeasureddetectionefficiency.The normal-ization factorN (λ) is calculatedby integrating W· over cosϑ

and ϕ uniformly,using(pT,|y|,M)distributionsdeterminedfrom thebackground-subtracteddata.Toaccountforthestatistical fluc-tuationsrelatedtoits randomnature,thebackgroundsubtraction procedureisrepeated50times.

Fig. 3 compares the cosϑ and ϕ distributions measured for

curves representing the “best fit”. Forillustration, curves reflect-ingextremepolarizationscenariosarealsoshown:fullytransverse (λϑ= +1) and fully longitudinal (λϑ= −1) in the cosϑ panel,

andλϕ= ±0.5 in the ϕ panel (|λϕ|must be smaller than0.5 if

λϑ=0[14]).

Eachofthesystematicuncertaintiesonthepolarization param-eterscausedbytheanalysisframeworkandthedetection efficien-ciesisindividually evaluated through50statisticallyindependent pseudo-experiments.Foreacheffect,thesystematicuncertaintyis thedifferencebetweentheinjectedandresultingparameters.The robustnessoftheframeworktomeasurethesignalpolarizationis validatedforseveralsignalandbackgroundpolarizationscenarios. Theimpactofresidualbiasesthatcouldbecausedbyuncertainties onthemuonordimuonefficienciesisevaluatedbyextractingthe polarizationparametersafterapplyingcorrespondingvariationsto theinputefficiencies.Thebackgroundmodeluncertaintyis evalu-atedbymodifyingtherelativeweightsofthelow- andhigh-mass sidebands when building the background distributions. A broad rangeof hypothesesis considered,including theassumption that the background under the ϒ(1S) (ϒ(3S)) peak resembles exclu-sively the low-mass(high-mass) sideband, orassuming that it is reproducedbyanequalmixtureofthetwosidebanddistributions. Severalsystematicuncertainties havesimilarlevels, exceptinthe highestNch bins andthe lowest pT range,wherethe background modeluncertaintydominates,especiallyfortheϒ(2S) andϒ(3S)

states.Fortheϒ(1S)stateandintheHXframe,theNch-dependent systematic uncertainties are ∼0.1 for λϑ and ∼0.03–0.05 for λϕ

and λϑϕ , slightly increasing with Nch. The corresponding ϒ(2S) andϒ(3S) valuesare slightly larger: ∼0.2 forλϑ, ∼0.04 for λϕ ,

and∼0.05–0.08 forλϑϕ . The statisticaluncertainties are

negligi-bleforthe ϒ(1S)state andbecome dominantfortheϒ(2S) and

ϒ(3S)states,asNch increases.

4. Results

The final PPD of the polarization parameters is an envelope of the PPDs corresponding to all hypotheses considered in the evaluation of the systematic uncertainties. In each analysis bin, thecentralvaluesand68.3%confidencelevel(CL)uncertaintiesof eachpolarizationparameterareevaluatedfromthecorresponding one-dimensionalmarginalposterior, calculatedbynumerical inte-gration. In the HX frame, the λ parameters are measured with negligible correlations, as illustrated by Fig. 4, which shows the two-dimensional marginals ofthePPD inthe λϕ vs. λϑ andλϑϕ

vs.λϕ planes,forarepresentativeanalysisbin.

Fig. 5 shows the λϑ, λϕ , λϑϕ , and ˜λ values measured in the

HXframeforthethreeϒ(nS)states,inboth pTranges.The corre-spondingnumericalresultsaretabulatedinthesupplemental ma-terial.The ˜λvalueshavealsobeenmeasuredintheCollins–Soper frame(CS)[22],whosez axisistheaverageofthetwobeam direc-tionsintheϒ restframe,andintheperpendicularhelicityframe (PX) [23], orthogonal to the CS frame. The three measurements agreewitheach other,within systematicuncertainties(similar in allframes),asrequiredintheabsenceofunaccounted systematic effects[24].

Regardingthe ϒ(1S) results,allthe λ parameters arecloseto zero,indicating essentiallyunpolarized production,asexpectedif the mesons included in this analysis would be dominantly pro-ducedthrough theunpolarized1S[₀8] pre-resonant octetstate.The trend asa function of Nch does not indicate anystrong changes in ϒ(1S) production betweenlow- and high-multiplicity pp col-lisions. The measurements are compatible with a non-negligible fractionofϒ(2S)andϒ(3S)mesonsbeingproducedviathe trans-verselypolarized3_S[8]

1 octetterm.Giventhepresentuncertainties,

Fig. 4. Two-dimensional marginalsofthePPDfortheHXframeinthe λϕ vs. λϑ (top)and λϑϕvs. λϕ (bottom)planes,for ϒ(2S)with15<pT<35 GeV and10 < Nch<20,displayingthe68.3%and99.7%CLtotaluncertainties.Theshadedareas representphysicallyforbiddenregionsofparameterspaceforthedecayofa J=1 particle[14].

no clear trends can be seen regardingchanges of their polariza-tionswithNch.

Toplacetheseresultsintocontext,Fig. 6-topillustrateshowthe

λϑ parameter wouldchange as a function of Nch if quarkonium production would be dominated by two processes, one unpolar-ized (λϑ =0, as is the case for the 1S[08] octet) and the other fullytransversely polarizedintheHX frame(λϑ= +1,asforthe

3_S[8]

1 octet, athighenough pT). The fourcurves represent differ-entvariationswithNch(linearlyinthe0<Nch<60 range)ofthe fractionofevents, f ,producedthroughthelatterprocess(defined in the legends). These curves were computed knowing that the polarization ofa sample of quarkonium statesproduced through two differentprocesses,ofpolarizationsλ0 andλ1,dependson f as[25] λ(f)=  (1− f) λ0 3+ λ0 + fλ1 3+ λ1  1−f 3+ λ0+ f 3+ λ1  . (4)

Fig. 5. The λϑ, λϕ, λϑϕ,and˜λparameters(toptobottom)forthe ϒ(1S), ϒ(2S),and ϒ(3S)states(lefttoright),intheHXframe,asafunctionofNch,forbothpTranges. The˜λvaluesarealsoshownfortheCSframe;theHXandCSuncertaintiesarestronglycorrelated.TheverticalbarsrepresenttheNch-dependenttotaluncertainties(at 68.3%CL),whiletheboxesatthezerohorizontallinerepresenttheglobaluncertainties.ThepointsareplacedattheaverageNchofeachbin,withasmalloffsetforeasier viewing.

ChangesintheLDMEs,inparticularofthedominant1S[₀8] and 3_S[8]

1 octetterms[7],arenottheonlypossiblecauseofvariations in the measured ϒ(nS) λ parameters between low- and high-multiplicity pp collisions; the effects of feed-down decays from heavier quarkonia should also be considered. In fact, the polar-izationsreportedherecorrespondtoinclusiveϒ(nS)samples,not distinguishing mesons emitted in the decays of S- and P-wave bottomonium states from the directly-produced ones. Assuming that all directly-produced S-wave states have identical polariza-tions, their decays to lighter S-wave statesdo not induce differ-ences between the measured (inclusive) polarizations and those ofthedirectly-producedmesons. Onthecontrary, feed-down de-caysfromP-wavestatescansignificantlyaffectthemeasured val-ues,especially for the ϒ(1S) state, presumably the one affected by the largest feed-down fraction. It is presently not possible to reliably evaluate the influence of the feed-down decays on the

measured ϒ(nS) polarizations, for lack of information regarding the χb polarizationsandtheir feed-downfractions.Fig. 6-bottom shows how the measured (inclusive) polarization is expected to change as a function of Nch if the directly-produced component (of polarization λ0) iscomplementedby a feed-downcomponent (ofpolarization λ1)that contributeswitha fraction f , decreasing linearly with Nch from 50% to 0 inthe 0<Nch<60 range. The sixcurvescorrespondto differentassumptionsforλ0 andλ1, re-portedinthelegends,withλ1representinganeffectiveaverageof the χb1 and χb2 polarizations (the χb1 and χb2 λϑ values must

verifyλϑ>−1/3 andλϑ>−3/5,respectively[25]).Inthese

sce-nariosthefeed-downfractionisassumedtobecome negligibleat high Nch,wherethe inclusiveλϑ tendsto thedirectλ0 value.At low Nch,wherethefeed-downcontributionis,hypothetically,the highest, the inclusive λϑ parametercrucially dependson the

Fig. 6. Expected Nch-dependencesofthe λϑparameterforthesumoftwoprocesses, ofpolarizations λ0and λ1,ofrelativefractionschanginglinearlywithNch(seetext fordetails).Themeasured λϑvaluesarealsoshown,forthe ϒ(3S)(top)and ϒ(1S) (bottom).

5. Summary

Thepolarizationsoftheϒ(1S),ϒ(2S),andϒ(3S)mesons pro-duced in pp collisions at √s=7 TeV have been determined as functionsofthe chargedparticlemultiplicity ofthe eventintwo

ϒ(nS) pT ranges.Themeasurementsdonotshowsignificant vari-ations as a function of Nch, even though the large ϒ(2S) and

ϒ(3S) uncertainties preclude definite statements in these cases. Thisstudyopensthewayforanalogousmeasurementsextending to the charmonium family,particularly interesting for the ψ(2S), whichisunaffectedbyfeed-downdecaysand,therefore,providesa moredirectprobeofLDMEuniversality.Equivalentanalysesshould alsobeperformedinpPbandPbPbeventsamples,inviewof eval-uating how quark–antiquark bound-state formation is influenced by the surrounding medium, which is an essential input forthe interpretationofquarkonium suppressionpatternsinnuclear col-lisions.

Acknowledgements

WecongratulateourcolleaguesintheCERNaccelerator depart-ments for the excellent performance of the LHC and thank the technicalandadministrativestaffs atCERN andatother CMS in-stitutes for their contributions to the success of the CMS effort. Inaddition,wegratefullyacknowledgethecomputingcentresand personneloftheWorldwideLHCComputingGridfordeliveringso effectivelythe computinginfrastructureessential to ouranalyses.

Finally, we acknowledge the enduring support for the construc-tion and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); F.R.S.- FNRS andFWO(Belgium);CNPq,CAPES,FAPERJ,andFAPESP (Brazil);MES(Bulgaria);CERN;CAS,MOST,andNSFC(China); COL-CIENCIAS(Colombia);MSESandCSF(Croatia);RPF(Cyprus);MoER, ERC IUT andERDF (Estonia); Academy of Finland, MEC, andHIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India);IPM(Iran); SFI(Ireland); INFN(Italy); MSIPandNRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portu-gal);JINR(Dubna);MON,RosAtom,RASandRFBR(Russia);MESTD (Serbia);SEIDIandCPAN(Spain);SwissFundingAgencies (Switzer-land); MST (Taipei); ThEPCenter, IPST, STAR and NSTDA (Thai-land);TUBITAKandTAEK(Turkey);NASUandSFFR(Ukraine);STFC (UnitedKingdom);DOEandNSF(USA).

Individuals have received support from the Marie-Curie pro-gramme andtheEuropean Research Council andEPLANET (Euro-peanUnion);theLeventisFoundation;theAlfredP.Sloan Founda-tion; the Alexander von Humboldt Foundation; the Belgian Fed-eral Science Policy Office; the Fonds pour la Formation à la Recherchedansl’Industrieetdansl’Agriculture (FRIA-Belgium);the AgentschapvoorInnovatiedoorWetenschapenTechnologie (IWT-Belgium); the MinistryofEducation, Youth andSports(MEYS) of theCzechRepublic;theCouncilofScienceandIndustrialResearch, India; the HOMING PLUSprogramme of the Foundation for Pol-ish Science, cofinanced from European Union, Regional Develop-ment Fund; the OPUS programme of the National Science Cen-ter (Poland);the Compagnia diSan Paolo(Torino); MIUR project 20108T4XTM (Italy); the Thalis and Aristeia programmes cofi-nancedbyEU-ESFandtheGreekNSRF;theNationalPriorities Re-searchProgrambyQatarNationalResearchFund;theRachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn Univer-sity (Thailand);theChulalongkornAcademic intoIts 2nd Century Project Advancement Project (Thailand); and the Welch Founda-tion,contractC-1845.

Appendix A. Supplementarymaterial

Supplementarymaterialrelatedtothisarticlecanbefound on-lineathttp://dx.doi.org/10.1016/j.physletb.2016.07.065.

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TheCMSCollaboration

V. Khachatryan,A.M. Sirunyan, A. Tumasyan YerevanPhysicsInstitute,Yerevan,Armenia

W. Adam, E. Asilar,T. Bergauer, J. Brandstetter, E. Brondolin, M. Dragicevic, J. Erö,C. Fabjan1, M. Flechl, M. Friedl,R. Frühwirth1,V.M. Ghete, C. Hartl, N. Hörmann, J. Hrubec, M. Jeitler1, V. Knünz,A. König, M. Krammer1, I. Krätschmer,D. Liko, T. Matsushita,I. Mikulec, D. Rabady2,N. Rad, B. Rahbaran,

H. Rohringer,J. Schieck1,R. Schöfbeck, J. Strauss,W. Treberer-Treberspurg, W. Waltenberger, C.-E. Wulz1 InstitutfürHochenergiephysikderOeAW,Wien,Austria

V. Mossolov,N. Shumeiko,J. Suarez Gonzalez NationalCentreforParticleandHighEnergyPhysics,Minsk,Belarus

S. Alderweireldt, T. Cornelis,E.A. De Wolf,X. Janssen, A. Knutsson,J. Lauwers, S. Luyckx, M. Van De Klundert,H. Van Haevermaet,P. Van Mechelen, N. Van Remortel, A. Van Spilbeeck UniversiteitAntwerpen,Antwerpen,Belgium

S. Abu Zeid,F. Blekman, J. D’Hondt, N. Daci,I. De Bruyn, K. Deroover, N. Heracleous,J. Keaveney, S. Lowette,L. Moreels,A. Olbrechts, Q. Python, D. Strom, S. Tavernier,W. Van Doninck, P. Van Mulders, G.P. Van Onsem,I. Van Parijs

VrijeUniversiteitBrussel,Brussel,Belgium

P. Barria, H. Brun,C. Caillol, B. Clerbaux, G. De Lentdecker, W. Fang,G. Fasanella, L. Favart, R. Goldouzian, A. Grebenyuk,G. Karapostoli,T. Lenzi, A. Léonard,T. Maerschalk, A. Marinov,L. Perniè, A. Randle-conde, T. Seva,C. Vander Velde, P. Vanlaer,R. Yonamine, F. Zenoni, F. Zhang3

UniversitéLibredeBruxelles,Bruxelles,Belgium

K. Beernaert,L. Benucci, A. Cimmino, S. Crucy, D. Dobur, A. Fagot,G. Garcia,M. Gul, J. Mccartin, A.A. Ocampo Rios,D. Poyraz, D. Ryckbosch, S. Salva, M. Sigamani,M. Tytgat, W. Van Driessche, E. Yazgan,N. Zaganidis

GhentUniversity,Ghent,Belgium

S. Basegmez, C. Beluffi4,O. Bondu,S. Brochet, G. Bruno, A. Caudron, L. Ceard, C. Delaere, D. Favart, L. Forthomme,A. Giammanco, A. Jafari,P. Jez, M. Komm, V. Lemaitre, A. Mertens, M. Musich, C. Nuttens, L. Perrini, K. Piotrzkowski,A. Popov5,L. Quertenmont, M. Selvaggi, M. Vidal Marono

UniversitéCatholiquedeLouvain,Louvain-la-Neuve,Belgium N. Beliy, G.H. Hammad

UniversitédeMons,Mons,Belgium

W.L. Aldá Júnior, F.L. Alves,G.A. Alves, L. Brito,M. Correa Martins Junior,M. Hamer, C. Hensel, A. Moraes,M.E. Pol, P. Rebello Teles

CentroBrasileirodePesquisasFisicas,RiodeJaneiro,Brazil

E. Belchior Batista Das Chagas, W. Carvalho,J. Chinellato6,A. Custódio, E.M. Da Costa,

D. De Jesus Damiao,C. De Oliveira Martins, S. Fonseca De Souza, L.M. Huertas Guativa, H. Malbouisson, D. Matos Figueiredo, C. Mora Herrera,L. Mundim, H. Nogima,W.L. Prado Da Silva, A. Santoro,

A. Sznajder,E.J. Tonelli Manganote6, A. Vilela Pereira UniversidadedoEstadodoRiodeJaneiro,RiodeJaneiro,Brazil

S. Ahujaa, C.A. Bernardesb, A. De Souza Santosb,S. Dograa, T.R. Fernandez Perez Tomeia,

E.M. Gregoresb, P.G. Mercadanteb,C.S. Moona,7,S.F. Novaesa,Sandra S. Padulaa,D. Romero Abadb, J.C. Ruiz Vargas

a_{UniversidadeEstadualPaulista,SãoPaulo,Brazil} b_{UniversidadeFederaldoABC,SãoPaulo,Brazil}

A. Aleksandrov, R. Hadjiiska, P. Iaydjiev,M. Rodozov, S. Stoykova, G. Sultanov, M. Vutova InstituteforNuclearResearchandNuclearEnergy,Sofia,Bulgaria

A. Dimitrov, I. Glushkov,L. Litov, B. Pavlov,P. Petkov UniversityofSofia,Sofia,Bulgaria

M. Ahmad, J.G. Bian, G.M. Chen, H.S. Chen,M. Chen, T. Cheng, R. Du,C.H. Jiang, D. Leggat, R. Plestina8, F. Romeo,S.M. Shaheen, A. Spiezia, J. Tao, C. Wang,Z. Wang, H. Zhang

InstituteofHighEnergyPhysics,Beijing,China

C. Asawatangtrakuldee, Y. Ban, Q. Li, S. Liu,Y. Mao, S.J. Qian, D. Wang,Z. Xu StateKeyLaboratoryofNuclearPhysicsandTechnology,PekingUniversity,Beijing,China

C. Avila,A. Cabrera, L.F. Chaparro Sierra, C. Florez, J.P. Gomez, B. Gomez Moreno,J.C. Sanabria UniversidaddeLosAndes,Bogota,Colombia

N. Godinovic, D. Lelas, I. Puljak,P.M. Ribeiro Cipriano

UniversityofSplit,FacultyofElectricalEngineering,MechanicalEngineeringandNavalArchitecture,Split,Croatia Z. Antunovic, M. Kovac

UniversityofSplit,FacultyofScience,Split,Croatia

V. Brigljevic,K. Kadija, J. Luetic, S. Micanovic,L. Sudic InstituteRudjerBoskovic,Zagreb,Croatia

UniversityofCyprus,Nicosia,Cyprus

M. Bodlak,M. Finger9, M. Finger Jr.9 CharlesUniversity,Prague,CzechRepublic

A.A. Abdelalim10,11,A. Awad, A. Mahrous10,A. Radi12,13

AcademyofScientificResearchandTechnologyoftheArabRepublicofEgypt,EgyptianNetworkofHighEnergyPhysics,Cairo,Egypt B. Calpas,M. Kadastik, M. Murumaa, M. Raidal, A. Tiko,C. Veelken

NationalInstituteofChemicalPhysicsandBiophysics,Tallinn,Estonia P. Eerola,J. Pekkanen, M. Voutilainen DepartmentofPhysics,UniversityofHelsinki,Helsinki,Finland

J. Härkönen,V. Karimäki, R. Kinnunen, T. Lampén, K. Lassila-Perini,S. Lehti, T. Lindén,P. Luukka, T. Peltola,J. Tuominiemi,E. Tuovinen, L. Wendland

HelsinkiInstituteofPhysics,Helsinki,Finland J. Talvitie,T. Tuuva

LappeenrantaUniversityofTechnology,Lappeenranta,Finland

M. Besancon,F. Couderc, M. Dejardin, D. Denegri,B. Fabbro, J.L. Faure, C. Favaro, F. Ferri, S. Ganjour, A. Givernaud, P. Gras, G. Hamel de Monchenault,P. Jarry, E. Locci, M. Machet,J. Malcles, J. Rander, A. Rosowsky,M. Titov, A. Zghiche

DSM/IRFU,CEA/Saclay,Gif-sur-Yvette,France

A. Abdulsalam,I. Antropov, S. Baffioni, F. Beaudette, P. Busson, L. Cadamuro, E. Chapon,C. Charlot, O. Davignon,N. Filipovic, R. Granier de Cassagnac, M. Jo,S. Lisniak, L. Mastrolorenzo, P. Miné,

I.N. Naranjo,M. Nguyen, C. Ochando, G. Ortona, P. Paganini,P. Pigard, S. Regnard, R. Salerno,J.B. Sauvan, Y. Sirois,T. Strebler, Y. Yilmaz, A. Zabi

LaboratoireLeprince-Ringuet,EcolePolytechnique,IN2P3-CNRS,Palaiseau,France

J.-L. Agram14,J. Andrea, A. Aubin,D. Bloch, J.-M. Brom,M. Buttignol, E.C. Chabert,N. Chanon, C. Collard, E. Conte14,X. Coubez, J.-C. Fontaine14, D. Gelé, U. Goerlach,C. Goetzmann, A.-C. Le Bihan, J.A. Merlin2, K. Skovpen,P. Van Hove

InstitutPluridisciplinaireHubertCurien,UniversitédeStrasbourg,UniversitédeHauteAlsaceMulhouse,CNRS/IN2P3,Strasbourg,France S. Gadrat

CentredeCalculdel’InstitutNationaldePhysiqueNucleaireetdePhysiquedesParticules,CNRS/IN2P3,Villeurbanne,France

S. Beauceron,C. Bernet, G. Boudoul,E. Bouvier, C.A. Carrillo Montoya, R. Chierici,D. Contardo, B. Courbon,P. Depasse, H. El Mamouni,J. Fan, J. Fay, S. Gascon,M. Gouzevitch, B. Ille, F. Lagarde, I.B. Laktineh,M. Lethuillier, L. Mirabito,A.L. Pequegnot, S. Perries, J.D. Ruiz Alvarez,D. Sabes, L. Sgandurra,V. Sordini, M. Vander Donckt, P. Verdier,S. Viret

UniversitédeLyon,UniversitéClaudeBernardLyon1,CNRS-IN2P3,InstitutdePhysiqueNucléairedeLyon,Villeurbanne,France T. Toriashvili15

GeorgianTechnicalUniversity,Tbilisi,Georgia Z. Tsamalaidze9

C. Autermann, S. Beranek,L. Feld, A. Heister, M.K. Kiesel, K. Klein, M. Lipinski, A. Ostapchuk, M. Preuten, F. Raupach, S. Schael, J.F. Schulte,T. Verlage, H. Weber, V. Zhukov5

RWTHAachenUniversity,I.PhysikalischesInstitut,Aachen,Germany

M. Ata, M. Brodski,E. Dietz-Laursonn, D. Duchardt, M. Endres, M. Erdmann,S. Erdweg, T. Esch, R. Fischer,A. Güth, T. Hebbeker, C. Heidemann, K. Hoepfner,S. Knutzen, P. Kreuzer,M. Merschmeyer, A. Meyer, P. Millet,S. Mukherjee, M. Olschewski, K. Padeken,P. Papacz, T. Pook,M. Radziej, H. Reithler, M. Rieger, F. Scheuch,L. Sonnenschein, D. Teyssier, S. Thüer

RWTHAachenUniversity,III.PhysikalischesInstitutA,Aachen,Germany

V. Cherepanov, Y. Erdogan,G. Flügge, H. Geenen, M. Geisler, F. Hoehle, B. Kargoll, T. Kress, A. Künsken, J. Lingemann, A. Nehrkorn, A. Nowack,I.M. Nugent, C. Pistone, O. Pooth,A. Stahl

RWTHAachenUniversity,III.PhysikalischesInstitutB,Aachen,Germany

M. Aldaya Martin,I. Asin, N. Bartosik, O. Behnke, U. Behrens,K. Borras16,A. Burgmeier, A. Campbell, C. Contreras-Campana, F. Costanza, C. Diez Pardos,G. Dolinska, S. Dooling,T. Dorland, G. Eckerlin,

D. Eckstein, T. Eichhorn, G. Flucke, E. Gallo17,J. Garay Garcia, A. Geiser, A. Gizhko, P. Gunnellini, J. Hauk, M. Hempel18,H. Jung, A. Kalogeropoulos, O. Karacheban18, M. Kasemann,P. Katsas, J. Kieseler,

C. Kleinwort,I. Korol, W. Lange, J. Leonard,K. Lipka, A. Lobanov, W. Lohmann18,R. Mankel,

I.-A. Melzer-Pellmann,A.B. Meyer, G. Mittag, J. Mnich, A. Mussgiller, S. Naumann-Emme,A. Nayak, E. Ntomari,H. Perrey, D. Pitzl,R. Placakyte, A. Raspereza, B. Roland,M.Ö. Sahin, P. Saxena,

T. Schoerner-Sadenius,C. Seitz, S. Spannagel, N. Stefaniuk, K.D. Trippkewitz,R. Walsh, C. Wissing DeutschesElektronen-Synchrotron,Hamburg,Germany

V. Blobel, M. Centis Vignali, A.R. Draeger,J. Erfle, E. Garutti, K. Goebel, D. Gonzalez, M. Görner, J. Haller, M. Hoffmann,R.S. Höing, A. Junkes, R. Klanner, R. Kogler,N. Kovalchuk, T. Lapsien, T. Lenz,I. Marchesini, D. Marconi,M. Meyer, D. Nowatschin, J. Ott, F. Pantaleo2, T. Peiffer, A. Perieanu, N. Pietsch,J. Poehlsen, D. Rathjens, C. Sander, C. Scharf,P. Schleper, E. Schlieckau, A. Schmidt, S. Schumann,J. Schwandt,

V. Sola, H. Stadie,G. Steinbrück, F.M. Stober,H. Tholen, D. Troendle,E. Usai, L. Vanelderen,A. Vanhoefer, B. Vormwald

UniversityofHamburg,Hamburg,Germany

C. Barth,C. Baus, J. Berger,C. Böser, E. Butz, T. Chwalek, F. Colombo, W. De Boer, A. Descroix,

A. Dierlamm, S. Fink,F. Frensch, R. Friese,M. Giffels, A. Gilbert,D. Haitz, F. Hartmann2,S.M. Heindl, U. Husemann,I. Katkov5,A. Kornmayer2,P. Lobelle Pardo, B. Maier, H. Mildner, M.U. Mozer, T. Müller, Th. Müller, M. Plagge, G. Quast, K. Rabbertz,S. Röcker, F. Roscher, M. Schröder,G. Sieber, H.J. Simonis, R. Ulrich, J. Wagner-Kuhr, S. Wayand,M. Weber, T. Weiler, S. Williamson, C. Wöhrmann, R. Wolf InstitutfürExperimentelleKernphysik,Karlsruhe,Germany

G. Anagnostou, G. Daskalakis,T. Geralis,V.A. Giakoumopoulou, A. Kyriakis, D. Loukas, A. Psallidas, I. Topsis-Giotis

InstituteofNuclearandParticlePhysics(INPP),NCSRDemokritos,AghiaParaskevi,Greece

A. Agapitos, S. Kesisoglou, A. Panagiotou, N. Saoulidou, E. Tziaferi NationalandKapodistrianUniversityofAthens,Athens,Greece

I. Evangelou, G. Flouris,C. Foudas, P. Kokkas, N. Loukas, N. Manthos, I. Papadopoulos,E. Paradas, J. Strologas

UniversityofIoánnina,Ioánnina,Greece

G. Bencze,C. Hajdu, A. Hazi,P. Hidas, D. Horvath19,F. Sikler, V. Veszpremi, G. Vesztergombi20, A.J. Zsigmond

WignerResearchCentreforPhysics,Budapest,Hungary

N. Beni,S. Czellar, J. Karancsi21,J. Molnar, Z. Szillasi2 InstituteofNuclearResearchATOMKI,Debrecen,Hungary

M. Bartók22,A. Makovec,P. Raics, Z.L. Trocsanyi, B. Ujvari UniversityofDebrecen,Debrecen,Hungary

S. Choudhury23,P. Mal, K. Mandal, D.K. Sahoo, N. Sahoo,S.K. Swain NationalInstituteofScienceEducationandResearch,Bhubaneswar,India

S. Bansal,S.B. Beri, V. Bhatnagar, R. Chawla, R. Gupta,U. Bhawandeep, A.K. Kalsi, A. Kaur, M. Kaur, R. Kumar,A. Mehta,M. Mittal, J.B. Singh, G. Walia

PanjabUniversity,Chandigarh,India

Ashok Kumar,A. Bhardwaj, B.C. Choudhary, R.B. Garg,S. Malhotra, M. Naimuddin,N. Nishu, K. Ranjan, R. Sharma,V. Sharma

UniversityofDelhi,Delhi,India

S. Bhattacharya, K. Chatterjee,S. Dey, S. Dutta, N. Majumdar, A. Modak, K. Mondal, S. Mukhopadhyay, A. Roy,D. Roy, S. Roy Chowdhury, S. Sarkar,M. Sharan

SahaInstituteofNuclearPhysics,Kolkata,India

R. Chudasama, D. Dutta, V. Jha, V. Kumar, A.K. Mohanty2,L.M. Pant, P. Shukla, A. Topkar BhabhaAtomicResearchCentre,Mumbai,India

T. Aziz,S. Banerjee, S. Bhowmik24, R.M. Chatterjee, R.K. Dewanjee,S. Dugad, S. Ganguly, S. Ghosh, M. Guchait,A. Gurtu25, Sa. Jain, G. Kole, S. Kumar,B. Mahakud, M. Maity24,G. Majumder, K. Mazumdar, S. Mitra, G.B. Mohanty, B. Parida,T. Sarkar24,N. Sur, B. Sutar, N. Wickramage26

TataInstituteofFundamentalResearch,Mumbai,India

S. Chauhan,S. Dube, A. Kapoor, K. Kothekar, S. Sharma IndianInstituteofScienceEducationandResearch(IISER),Pune,India

H. Bakhshiansohi,H. Behnamian,S.M. Etesami27, A. Fahim28, M. Khakzad, M. Mohammadi Najafabadi, M. Naseri, S. Paktinat Mehdiabadi,F. Rezaei Hosseinabadi, B. Safarzadeh29, M. Zeinali

InstituteforResearchinFundamentalSciences(IPM),Tehran,Iran M. Felcini,M. Grunewald

UniversityCollegeDublin,Dublin,Ireland

M. Abbresciaa,b, C. Calabriaa,b, C. Caputoa,b, A. Colaleoa,D. Creanzaa,c, L. Cristellaa,b,N. De Filippisa,c, M. De Palmaa,b_{, L. Fiore}a_{, G. Iaselli}a,c_{, G. Maggi}a,c_{, M. Maggi}a_{,G. Miniello}a,b_{,S. My}a,c_{,S. Nuzzo}a,b_, A. Pompilia,b, G. Pugliesea,c,R. Radognaa,b,A. Ranieria, G. Selvaggia,b, L. Silvestrisa,2,R. Vendittia,b a_{INFNSezionediBari,Bari,Italy}

b_{UniversitàdiBari,Bari,Italy} c_{PolitecnicodiBari,Bari,Italy}

G. Abbiendia,C. Battilana2,D. Bonacorsia,b,S. Braibant-Giacomellia,b,L. Brigliadoria,b, R. Campaninia,b, P. Capiluppia,b,A. Castroa,b,F.R. Cavalloa, S.S. Chhibraa,b, G. Codispotia,b, M. Cuffiania,b,

S. Marcellinia, G. Masettia, A. Montanaria, F.L. Navarriaa,b,A. Perrottaa, A.M. Rossia,b,T. Rovellia,b, G.P. Sirolia,b,N. Tosia,b,2

a_{INFNSezionediBologna,Bologna,Italy} b_{UniversitàdiBologna,Bologna,Italy}

G. Cappellob,M. Chiorbolia,b,S. Costaa,b,A. Di Mattiaa,F. Giordanoa,b,R. Potenzaa,b, A. Tricomia,b, C. Tuvea,b

a_{INFNSezionediCatania,Catania,Italy} b_{UniversitàdiCatania,Catania,Italy}

G. Barbaglia, V. Ciullia,b,C. Civininia, R. D’Alessandroa,b,E. Focardia,b,V. Goria,b, P. Lenzia,b, M. Meschinia, S. Paolettia,G. Sguazzonia,L. Viliania,b,2

a_{INFNSezionediFirenze,Firenze,Italy} b_{UniversitàdiFirenze,Firenze,Italy}

L. Benussi, S. Bianco, F. Fabbri,D. Piccolo, F. Primavera2 INFNLaboratoriNazionalidiFrascati,Frascati,Italy

V. Calvellia,b, F. Ferroa, M. Lo Veterea,b, M.R. Mongea,b,E. Robuttia,S. Tosia,b a_{INFNSezionediGenova,Genova,Italy}

b_{UniversitàdiGenova,Genova,Italy}

L. Brianza,M.E. Dinardoa,b, S. Fiorendia,b,S. Gennaia,R. Gerosaa,b,A. Ghezzia,b, P. Govonia,b,

S. Malvezzia, R.A. Manzonia,b,2, B. Marzocchia,b,D. Menascea,L. Moronia, M. Paganonia,b,D. Pedrinia, S. Ragazzia,b, N. Redaellia,T. Tabarelli de Fatisa,b

a_{INFNSezionediMilano-Bicocca,Milano,Italy} b_{UniversitàdiMilano-Bicocca,Milano,Italy}

S. Buontempoa, N. Cavalloa,c, S. Di Guidaa,d,2, M. Espositoa,b, F. Fabozzia,c,A.O.M. Iorioa,b,G. Lanzaa, L. Listaa,S. Meolaa,d,2,M. Merolaa,P. Paoluccia,2,C. Sciaccaa,b,F. Thyssen

a_{INFNSezionediNapoli,Napoli,Italy} b_{UniversitàdiNapoli‘FedericoII’,Napoli,Italy} c_{UniversitàdellaBasilicata,Potenza,Italy} d_{UniversitàG.Marconi,Roma,Italy}

P. Azzia,2, N. Bacchettaa, L. Benatoa,b,D. Biselloa,b, A. Bolettia,b,R. Carlina,b,P. Checchiaa,

M. Dall’Ossoa,b,2,T. Dorigoa,U. Dossellia, F. Fanzagoa,F. Gasparinia,b,U. Gasparinia,b,F. Gonellaa, A. Gozzelinoa, S. Lacapraraa,M. Margonia,b,A.T. Meneguzzoa,b,M. Michelottoa, J. Pazzinia,b,2, N. Pozzobona,b,P. Ronchesea,b, F. Simonettoa,b,E. Torassaa,M. Tosia,b,M. Zanetti,P. Zottoa,b, A. Zucchettaa,b,2,G. Zumerlea,b

a_{INFNSezionediPadova,Padova,Italy} b_{UniversitàdiPadova,Padova,Italy} c_{UniversitàdiTrento,Trento,Italy}

A. Braghieria,A. Magnania,b_{, P. Montagna}a,b_{,S.P. Ratti}a,b_{, V. Re}a_{, C. Riccardi}a,b_{,P. Salvini}a_{,I. Vai}a,b_, P. Vituloa,b

a_{INFNSezionediPavia,Pavia,Italy} b_{UniversitàdiPavia,Pavia,Italy}

L. Alunni Solestizia,b,G.M. Bileia, D. Ciangottinia,b,2, L. Fanòa,b,P. Laricciaa,b, G. Mantovania,b, M. Menichellia, A. Sahaa, A. Santocchiaa,b

a_{INFNSezionediPerugia,Perugia,Italy} b_{UniversitàdiPerugia,Perugia,Italy}

K. Androsova,30,P. Azzurria,2, G. Bagliesia, J. Bernardinia, T. Boccalia, R. Castaldia,M.A. Cioccia,30, R. Dell’Orsoa,S. Donatoa,c,2, G. Fedi,L. Foàa,c,†, A. Giassia,M.T. Grippoa,30,F. Ligabuea,c, T. Lomtadzea,

L. Martinia,b,A. Messineoa,b,F. Pallaa, A. Rizzia,b, A. Savoy-Navarroa,31, A.T. Serbana,P. Spagnoloa, R. Tenchinia,G. Tonellia,b, A. Venturia,P.G. Verdinia

a_{INFNSezionediPisa,Pisa,Italy} b_{UniversitàdiPisa,Pisa,Italy}

c_{ScuolaNormaleSuperiorediPisa,Pisa,Italy}

L. Baronea,b, F. Cavallaria,G. D’imperioa,b,2, D. Del Rea,b,2, M. Diemoza,S. Gellia,b, C. Jordaa,

E. Longoa,b, F. Margarolia,b, P. Meridiania,G. Organtinia,b, R. Paramattia,F. Preiatoa,b, S. Rahatloua,b, C. Rovellia,F. Santanastasioa,b,P. Traczyka,b,2

a_{INFNSezionediRoma,Roma,Italy} b_{UniversitàdiRoma,Roma,Italy}

N. Amapanea,b,R. Arcidiaconoa,c,2,S. Argiroa,b,M. Arneodoa,c,R. Bellana,b, C. Biinoa, N. Cartigliaa, M. Costaa,b, R. Covarellia,b, A. Deganoa,b,N. Demariaa,L. Fincoa,b,2,B. Kiania,b, C. Mariottia,S. Masellia, E. Migliorea,b,V. Monacoa,b, E. Monteila,b,M.M. Obertinoa,b,L. Pachera,b,N. Pastronea, M. Pelliccionia, G.L. Pinna Angionia,b,F. Raveraa,b,A. Romeroa,b,M. Ruspaa,c, R. Sacchia,b, A. Solanoa,b, A. Staianoa a_{INFNSezionediTorino,Torino,Italy}

b_{UniversitàdiTorino,Torino,Italy}

c_{UniversitàdelPiemonteOrientale,Novara,Italy}

S. Belfortea,V. Candelisea,b, M. Casarsaa,F. Cossuttia,G. Della Riccaa,b,B. Gobboa,C. La Licataa,b, M. Maronea,b, A. Schizzia,b, A. Zanettia

a_{INFNSezionediTrieste,Trieste,Italy} b_{UniversitàdiTrieste,Trieste,Italy}

A. Kropivnitskaya,S.K. Nam KangwonNationalUniversity,Chunchon,RepublicofKorea

D.H. Kim,G.N. Kim, M.S. Kim, D.J. Kong, S. Lee, Y.D. Oh,A. Sakharov, D.C. Son KyungpookNationalUniversity,Daegu,RepublicofKorea

J.A. Brochero Cifuentes,H. Kim, T.J. Kim ChonbukNationalUniversity,Jeonju,RepublicofKorea

S. Song

ChonnamNationalUniversity,InstituteforUniverseandElementaryParticles,Kwangju,RepublicofKorea

S. Cho,S. Choi, Y. Go, D. Gyun,B. Hong, H. Kim,Y. Kim,B. Lee, K. Lee, K.S. Lee, S. Lee, J. Lim, S.K. Park, Y. Roh

KoreaUniversity,Seoul,RepublicofKorea H.D. Yoo

SeoulNationalUniversity,Seoul,RepublicofKorea

M. Choi,H. Kim, J.H. Kim, J.S.H. Lee, I.C. Park, G. Ryu, M.S. Ryu UniversityofSeoul,Seoul,RepublicofKorea

Y. Choi,J. Goh, D. Kim, E. Kwon, J. Lee,I. Yu SungkyunkwanUniversity,Suwon,RepublicofKorea

V. Dudenas, A. Juodagalvis,J. Vaitkus VilniusUniversity,Vilnius,Lithuania

I. Ahmed,Z.A. Ibrahim, J.R. Komaragiri, M.A.B. Md Ali32,F. Mohamad Idris33,W.A.T. Wan Abdullah, M.N. Yusli,Z. Zolkapli

NationalCentreforParticlePhysics,UniversitiMalaya,KualaLumpur,Malaysia

E. Casimiro Linares, H. Castilla-Valdez, E. De La Cruz-Burelo,I. Heredia-De La Cruz34, A. Hernandez-Almada,R. Lopez-Fernandez, J. Mejia Guisao, A. Sanchez-Hernandez CentrodeInvestigacionydeEstudiosAvanzadosdelIPN,MexicoCity,Mexico

S. Carrillo Moreno, F. Vazquez Valencia UniversidadIberoamericana,MexicoCity,Mexico

I. Pedraza, H.A. Salazar Ibarguen, C. Uribe Estrada BenemeritaUniversidadAutonomadePuebla,Puebla,Mexico

A. Morelos Pineda

UniversidadAutónomadeSanLuisPotosí,SanLuisPotosí,Mexico D. Krofcheck

UniversityofAuckland,Auckland,NewZealand P.H. Butler

UniversityofCanterbury,Christchurch,NewZealand

A. Ahmad, M. Ahmad, Q. Hassan,H.R. Hoorani, W.A. Khan, T. Khurshid,M. Shoaib, M. Waqas NationalCentreforPhysics,Quaid-I-AzamUniversity,Islamabad,Pakistan

H. Bialkowska, M. Bluj,B. Boimska, T. Frueboes,M. Górski, M. Kazana, K. Nawrocki, K. Romanowska-Rybinska, M. Szleper,P. Zalewski

NationalCentreforNuclearResearch,Swierk,Poland

G. Brona, K. Bunkowski, A. Byszuk35,K. Doroba, A. Kalinowski, M. Konecki,J. Krolikowski, M. Misiura, M. Olszewski, M. Walczak

InstituteofExperimentalPhysics,FacultyofPhysics,UniversityofWarsaw,Warsaw,Poland

P. Bargassa,C. Beirão Da Cruz E Silva, A. Di Francesco, P. Faccioli, P.G. Ferreira Parracho,M. Gallinaro, J. Hollar, N. Leonardo,L. Lloret Iglesias, F. Nguyen, J. Rodrigues Antunes, J. Seixas,O. Toldaiev,

D. Vadruccio,J. Varela, P. Vischia

LaboratóriodeInstrumentaçãoeFísicaExperimentaldePartículas,Lisboa,Portugal

S. Afanasiev,P. Bunin, M. Gavrilenko, I. Golutvin, I. Gorbunov, A. Kamenev,V. Karjavin, A. Lanev,

A. Malakhov,V. Matveev36,37,P. Moisenz, V. Palichik,V. Perelygin, S. Shmatov, S. Shulha, N. Skatchkov, V. Smirnov, A. Zarubin

JointInstituteforNuclearResearch,Dubna,Russia

V. Golovtsov, Y. Ivanov, V. Kim38,E. Kuznetsova, P. Levchenko, V. Murzin, V. Oreshkin, I. Smirnov, V. Sulimov, L. Uvarov, S. Vavilov, A. Vorobyev

PetersburgNuclearPhysicsInstitute,Gatchina(St.Petersburg),Russia

Yu. Andreev,A. Dermenev, S. Gninenko, N. Golubev, A. Karneyeu,M. Kirsanov, N. Krasnikov, A. Pashenkov,D. Tlisov, A. Toropin

V. Epshteyn,V. Gavrilov, N. Lychkovskaya,V. Popov, I. Pozdnyakov,G. Safronov, A. Spiridonov, E. Vlasov, A. Zhokin

InstituteforTheoreticalandExperimentalPhysics,Moscow,Russia

M. Chadeeva,R. Chistov, M. Danilov,V. Rusinov, E. Tarkovskii NationalResearchNuclearUniversity‘MoscowEngineeringPhysicsInstitute’(MEPhI),Moscow,Russia

V. Andreev,M. Azarkin37,I. Dremin37, M. Kirakosyan, A. Leonidov37,G. Mesyats, S.V. Rusakov P.N.LebedevPhysicalInstitute,Moscow,Russia

A. Baskakov,A. Belyaev, E. Boos,A. Demiyanov,A. Ershov, A. Gribushin, O. Kodolova,V. Korotkikh, I. Lokhtin,I. Miagkov, S. Obraztsov,S. Petrushanko, V. Savrin, A. Snigirev, I. Vardanyan

SkobeltsynInstituteofNuclearPhysics,LomonosovMoscowStateUniversity,Moscow,Russia

I. Azhgirey,I. Bayshev,S. Bitioukov, V. Kachanov, A. Kalinin, D. Konstantinov,V. Krychkine, V. Petrov, R. Ryutin, A. Sobol,L. Tourtchanovitch, S. Troshin, N. Tyurin, A. Uzunian,A. Volkov

StateResearchCenterofRussianFederation,InstituteforHighEnergyPhysics,Protvino,Russia P. Adzic39,P. Cirkovic, D. Devetak,J. Milosevic,V. Rekovic UniversityofBelgrade,FacultyofPhysicsandVincaInstituteofNuclearSciences,Belgrade,Serbia

J. Alcaraz Maestre,E. Calvo, M. Cerrada,M. Chamizo Llatas, N. Colino, B. De La Cruz, A. Delgado Peris, A. Escalante Del Valle,C. Fernandez Bedoya, J.P. Fernández Ramos,J. Flix, M.C. Fouz,P. Garcia-Abia, O. Gonzalez Lopez,S. Goy Lopez, J.M. Hernandez, M.I. Josa, E. Navarro De Martino,

A. Pérez-Calero Yzquierdo,J. Puerta Pelayo, A. Quintario Olmeda,I. Redondo, L. Romero,J. Santaolalla, M.S. Soares

CentrodeInvestigacionesEnergéticasMedioambientalesyTecnológicas(CIEMAT),Madrid,Spain C. Albajar, J.F. de Trocóniz,M. Missiroli, D. Moran UniversidadAutónomadeMadrid,Madrid,Spain

J. Cuevas,J. Fernandez Menendez, S. Folgueras, I. Gonzalez Caballero,E. Palencia Cortezon, J.M. Vizan Garcia

UniversidaddeOviedo,Oviedo,Spain

I.J. Cabrillo, A. Calderon, J.R. Castiñeiras De Saa, E. Curras, P. De Castro Manzano,M. Fernandez, J. Garcia-Ferrero,G. Gomez, A. Lopez Virto, J. Marco,R. Marco, C. Martinez Rivero,F. Matorras,

J. Piedra Gomez,T. Rodrigo, A.Y. Rodríguez-Marrero,A. Ruiz-Jimeno, L. Scodellaro, N. Trevisani,I. Vila, R. Vilar Cortabitarte

InstitutodeFísicadeCantabria(IFCA),CSIC-UniversidaddeCantabria,Santander,Spain

D. Abbaneo, E. Auffray, G. Auzinger, M. Bachtis,P. Baillon, A.H. Ball, D. Barney, A. Benaglia,J. Bendavid, L. Benhabib,G.M. Berruti, P. Bloch,A. Bocci, A. Bonato, C. Botta, H. Breuker, T. Camporesi, R. Castello, G. Cerminara, M. D’Alfonso,D. d’Enterria, A. Dabrowski,V. Daponte, A. David,M. De Gruttola, F. De Guio, A. De Roeck, S. De Visscher, E. Di Marco40, M. Dobson, M. Dordevic, B. Dorney,T. du Pree, D. Duggan, M. Dünser,N. Dupont,A. Elliott-Peisert, G. Franzoni, J. Fulcher, W. Funk, D. Gigi,K. Gill, D. Giordano, M. Girone,F. Glege, R. Guida, S. Gundacker, M. Guthoff, J. Hammer, P. Harris,J. Hegeman, V. Innocente, P. Janot,H. Kirschenmann,M.J. Kortelainen, K. Kousouris,K. Krajczar, P. Lecoq,C. Lourenço,M.T. Lucchini, N. Magini,L. Malgeri,M. Mannelli, A. Martelli,L. Masetti, F. Meijers, S. Mersi, E. Meschi, F. Moortgat, S. Morovic, M. Mulders, M.V. Nemallapudi,H. Neugebauer, S. Orfanelli41, L. Orsini, L. Pape,E. Perez, M. Peruzzi,A. Petrilli, G. Petrucciani, A. Pfeiffer,M. Pierini,D. Piparo, A. Racz,T. Reis, G. Rolandi42, M. Rovere, M. Ruan,H. Sakulin, C. Schäfer, C. Schwick, M. Seidel,A. Sharma, P. Silva,M. Simon,

P. Sphicas43, J. Steggemann, B. Stieger,M. Stoye, Y. Takahashi,D. Treille, A. Triossi, A. Tsirou,G.I. Veres20, N. Wardle,H.K. Wöhri, A. Zagozdzinska35, W.D. Zeuner

CERN,EuropeanOrganizationforNuclearResearch,Geneva,Switzerland

W. Bertl,K. Deiters, W. Erdmann, R. Horisberger, Q. Ingram, H.C. Kaestli, D. Kotlinski,U. Langenegger, T. Rohe

PaulScherrerInstitut,Villigen,Switzerland

F. Bachmair, L. Bäni, L. Bianchini, B. Casal, G. Dissertori, M. Dittmar, M. Donegà, P. Eller, C. Grab, C. Heidegger, D. Hits, J. Hoss,G. Kasieczka, P. Lecomte†, W. Lustermann,B. Mangano, M. Marionneau, P. Martinez Ruiz del Arbol, M. Masciovecchio, M.T. Meinhard,D. Meister,F. Micheli, P. Musella, F. Nessi-Tedaldi, F. Pandolfi, J. Pata, F. Pauss,L. Perrozzi,M. Quittnat, M. Rossini, M. Schönenberger, A. Starodumov44,M. Takahashi, V.R. Tavolaro, K. Theofilatos,R. Wallny

InstituteforParticlePhysics,ETHZurich,Zurich,Switzerland

T.K. Aarrestad, C. Amsler45, L. Caminada,M.F. Canelli, V. Chiochia,A. De Cosa, C. Galloni, A. Hinzmann, T. Hreus, B. Kilminster,C. Lange, J. Ngadiuba, D. Pinna,G. Rauco, P. Robmann, D. Salerno, Y. Yang UniversitätZürich,Zurich,Switzerland

M. Cardaci, K.H. Chen,T.H. Doan, Sh. Jain,R. Khurana, M. Konyushikhin, C.M. Kuo, W. Lin, Y.J. Lu, A. Pozdnyakov,S.S. Yu

NationalCentralUniversity,Chung-Li,Taiwan

Arun Kumar, P. Chang, Y.H. Chang,Y.W. Chang, Y. Chao, K.F. Chen, P.H. Chen, C. Dietz,F. Fiori,

U. Grundler,W.-S. Hou, Y. Hsiung, Y.F. Liu,R.-S. Lu, M. Miñano Moya,E. Petrakou, J.f. Tsai, Y.M. Tzeng NationalTaiwanUniversity(NTU),Taipei,Taiwan

B. Asavapibhop, K. Kovitanggoon, G. Singh, N. Srimanobhas,N. Suwonjandee ChulalongkornUniversity,FacultyofScience,DepartmentofPhysics,Bangkok,Thailand

A. Adiguzel, S. Cerci46,S. Damarseckin, Z.S. Demiroglu, C. Dozen,I. Dumanoglu, S. Girgis, G. Gokbulut, Y. Guler, E. Gurpinar,I. Hos, E.E. Kangal47, A. Kayis Topaksu,G. Onengut48,K. Ozdemir49,A. Polatoz, B. Tali46, H. Topakli50, C. Zorbilmez

CukurovaUniversity,Adana,Turkey

B. Bilin, S. Bilmis, B. Isildak51, G. Karapinar52, M. Yalvac, M. Zeyrek MiddleEastTechnicalUniversity,PhysicsDepartment,Ankara,Turkey

E. Gülmez,M. Kaya53,O. Kaya54, E.A. Yetkin55, T. Yetkin56 BogaziciUniversity,Istanbul,Turkey

A. Cakir,K. Cankocak, S. Sen57,F.I. Vardarlı IstanbulTechnicalUniversity,Istanbul,Turkey

B. Grynyov

InstituteforScintillationMaterialsofNationalAcademyofScienceofUkraine,Kharkov,Ukraine L. Levchuk,P. Sorokin

R. Aggleton,F. Ball, L. Beck, J.J. Brooke, E. Clement, D. Cussans,H. Flacher, J. Goldstein,M. Grimes, G.P. Heath, H.F. Heath,J. Jacob, L. Kreczko, C. Lucas, Z. Meng, D.M. Newbold58, S. Paramesvaran,A. Poll, T. Sakuma,S. Seif El Nasr-storey, S. Senkin, D. Smith,V.J. Smith

UniversityofBristol,Bristol,UnitedKingdom

A. Belyaev59, C. Brew, R.M. Brown, L. Calligaris,D. Cieri, D.J.A. Cockerill, J.A. Coughlan, K. Harder,

S. Harper,E. Olaiya, D. Petyt,C.H. Shepherd-Themistocleous, A. Thea,I.R. Tomalin,T. Williams, S.D. Worm RutherfordAppletonLaboratory,Didcot,UnitedKingdom

M. Baber,R. Bainbridge, O. Buchmuller, A. Bundock,D. Burton, S. Casasso,M. Citron, D. Colling, L. Corpe, P. Dauncey,G. Davies, A. De Wit, M. Della Negra, P. Dunne, A. Elwood, D. Futyan,G. Hall, G. Iles, R. Lane, R. Lucas58,L. Lyons, A.-M. Magnan, S. Malik, J. Nash, A. Nikitenko44,J. Pela, M. Pesaresi, D.M. Raymond, A. Richards,A. Rose,C. Seez, A. Tapper,K. Uchida, M. Vazquez Acosta60,T. Virdee, S.C. Zenz

ImperialCollege,London,UnitedKingdom

J.E. Cole, P.R. Hobson,A. Khan, P. Kyberd,D. Leslie, I.D. Reid, P. Symonds, L. Teodorescu, M. Turner BrunelUniversity,Uxbridge,UnitedKingdom

A. Borzou,K. Call,J. Dittmann, K. Hatakeyama, H. Liu, N. Pastika BaylorUniversity,Waco,USA

O. Charaf,S.I. Cooper, C. Henderson, P. Rumerio TheUniversityofAlabama,Tuscaloosa,USA

D. Arcaro, A. Avetisyan, T. Bose,D. Gastler, D. Rankin, C. Richardson,J. Rohlf, L. Sulak,D. Zou BostonUniversity,Boston,USA

J. Alimena,G. Benelli, E. Berry, D. Cutts, A. Ferapontov, A. Garabedian,J. Hakala, U. Heintz, O. Jesus, E. Laird,G. Landsberg, Z. Mao, M. Narain, S. Piperov,S. Sagir, R. Syarif

BrownUniversity,Providence,USA

R. Breedon,G. Breto, M. Calderon De La Barca Sanchez, S. Chauhan,M. Chertok, J. Conway, R. Conway, P.T. Cox,R. Erbacher, G. Funk, M. Gardner,W. Ko, R. Lander, C. Mclean,M. Mulhearn, D. Pellett,J. Pilot, F. Ricci-Tam,S. Shalhout, J. Smith, M. Squires, D. Stolp, M. Tripathi,S. Wilbur, R. Yohay

UniversityofCalifornia,Davis,Davis,USA

R. Cousins,P. Everaerts, A. Florent, J. Hauser,M. Ignatenko, D. Saltzberg, E. Takasugi,V. Valuev, M. Weber UniversityofCalifornia,LosAngeles,USA

K. Burt,R. Clare, J. Ellison, J.W. Gary, G. Hanson,J. Heilman, M. Ivova PANEVA, P. Jandir, E. Kennedy, F. Lacroix,O.R. Long, M. Malberti,M. Olmedo Negrete, A. Shrinivas, H. Wei,S. Wimpenny, B.R. Yates UniversityofCalifornia,Riverside,Riverside,USA

J.G. Branson, G.B. Cerati,S. Cittolin, R.T. D’Agnolo, M. Derdzinski, A. Holzner, R. Kelley, D. Klein, J. Letts, I. Macneill,D. Olivito, S. Padhi, M. Pieri, M. Sani, V. Sharma, S. Simon,M. Tadel, A. Vartak,

S. Wasserbaech61,C. Welke,F. Würthwein, A. Yagil,G. Zevi Della Porta UniversityofCalifornia,SanDiego,LaJolla,USA

J. Bradmiller-Feld, C. Campagnari, A. Dishaw, V. Dutta,K. Flowers, M. Franco Sevilla,P. Geffert,C. George, F. Golf, L. Gouskos,J. Gran, J. Incandela, N. Mccoll, S.D. Mullin,J. Richman, D. Stuart,I. Suarez, C. West, J. Yoo

UniversityofCalifornia,SantaBarbara,SantaBarbara,USA

D. Anderson,A. Apresyan, A. Bornheim,J. Bunn, Y. Chen, J. Duarte, A. Mott, H.B. Newman,C. Pena, M. Spiropulu, J.R. Vlimant,S. Xie, R.Y. Zhu

CaliforniaInstituteofTechnology,Pasadena,USA

M.B. Andrews,V. Azzolini, A. Calamba,B. Carlson, T. Ferguson, M. Paulini, J. Russ, M. Sun, H. Vogel, I. Vorobiev

CarnegieMellonUniversity,Pittsburgh,USA

J.P. Cumalat, W.T. Ford,A. Gaz, F. Jensen, A. Johnson, M. Krohn,T. Mulholland, U. Nauenberg, K. Stenson, S.R. Wagner

UniversityofColoradoBoulder,Boulder,USA

J. Alexander, A. Chatterjee, J. Chaves,J. Chu, S. Dittmer, N. Eggert, N. Mirman, G. Nicolas Kaufman, J.R. Patterson,A. Rinkevicius, A. Ryd, L. Skinnari,L. Soffi, W. Sun, S.M. Tan, W.D. Teo, J. Thom, J. Thompson, J. Tucker, Y. Weng,P. Wittich

CornellUniversity,Ithaca,USA

S. Abdullin,M. Albrow, G. Apollinari,S. Banerjee, L.A.T. Bauerdick, A. Beretvas, J. Berryhill,P.C. Bhat, G. Bolla,K. Burkett,J.N. Butler, H.W.K. Cheung, F. Chlebana, S. Cihangir, V.D. Elvira,I. Fisk, J. Freeman, E. Gottschalk,L. Gray, D. Green, S. Grünendahl, O. Gutsche,J. Hanlon, D. Hare, R.M. Harris, S. Hasegawa, J. Hirschauer,Z. Hu, B. Jayatilaka,S. Jindariani, M. Johnson, U. Joshi, B. Klima, B. Kreis, S. Lammel, J. Lewis,J. Linacre, D. Lincoln,R. Lipton, T. Liu, R. Lopes De Sá,J. Lykken, K. Maeshima,J.M. Marraffino, S. Maruyama, D. Mason, P. McBride,P. Merkel,S. Mrenna, S. Nahn, C. Newman-Holmes†,V. O’Dell, K. Pedro, O. Prokofyev, G. Rakness, E. Sexton-Kennedy,A. Soha, W.J. Spalding, L. Spiegel, S. Stoynev, N. Strobbe,L. Taylor, S. Tkaczyk, N.V. Tran,L. Uplegger, E.W. Vaandering,C. Vernieri, M. Verzocchi, R. Vidal,M. Wang, H.A. Weber, A. Whitbeck

FermiNationalAcceleratorLaboratory,Batavia,USA

D. Acosta, P. Avery, P. Bortignon, D. Bourilkov,A. Brinkerhoff, A. Carnes, M. Carver, D. Curry,S. Das, R.D. Field, I.K. Furic, J. Konigsberg,A. Korytov, K. Kotov, P. Ma,K. Matchev, H. Mei, P. Milenovic62, G. Mitselmakher, D. Rank,R. Rossin, L. Shchutska, M. Snowball, D. Sperka, N. Terentyev, L. Thomas, J. Wang, S. Wang,J. Yelton

UniversityofFlorida,Gainesville,USA

S. Hewamanage, S. Linn, P. Markowitz, G. Martinez, J.L. Rodriguez FloridaInternationalUniversity,Miami,USA

A. Ackert, J.R. Adams,T. Adams, A. Askew,S. Bein, J. Bochenek, B. Diamond,J. Haas, S. Hagopian, V. Hagopian, K.F. Johnson, A. Khatiwada,H. Prosper,M. Weinberg

FloridaStateUniversity,Tallahassee,USA

M.M. Baarmand, V. Bhopatkar,S. Colafranceschi63, M. Hohlmann, H. Kalakhety,D. Noonan, T. Roy, F. Yumiceva

FloridaInstituteofTechnology,Melbourne,USA

M.R. Adams, L. Apanasevich,D. Berry, R.R. Betts, I. Bucinskaite, R. Cavanaugh, O. Evdokimov,L. Gauthier, C.E. Gerber,D.J. Hofman, P. Kurt, C. O’Brien,I.D. Sandoval Gonzalez, P. Turner,N. Varelas, Z. Wu,

M. Zakaria,J. Zhang

B. Bilki64,W. Clarida, K. Dilsiz, S. Durgut, R.P. Gandrajula,M. Haytmyradov, V. Khristenko, J.-P. Merlo, H. Mermerkaya65,A. Mestvirishvili, A. Moeller, J. Nachtman, H. Ogul, Y. Onel,F. Ozok66,A. Penzo, C. Snyder,E. Tiras, J. Wetzel, K. Yi

TheUniversityofIowa,IowaCity,USA

I. Anderson,B.A. Barnett, B. Blumenfeld, A. Cocoros, N. Eminizer, D. Fehling, L. Feng, A.V. Gritsan, P. Maksimovic,M. Osherson,J. Roskes, U. Sarica, M. Swartz, M. Xiao, Y. Xin, C. You

JohnsHopkinsUniversity,Baltimore,USA

P. Baringer,A. Bean,C. Bruner, R.P. Kenny III, D. Majumder, M. Malek,W. Mcbrayer, M. Murray, S. Sanders,R. Stringer, Q. Wang

TheUniversityofKansas,Lawrence,USA

A. Ivanov, K. Kaadze,S. Khalil, M. Makouski,Y. Maravin, A. Mohammadi, L.K. Saini,N. Skhirtladze, S. Toda

KansasStateUniversity,Manhattan,USA

D. Lange,F. Rebassoo, D. Wright LawrenceLivermoreNationalLaboratory,Livermore,USA

C. Anelli,A. Baden,O. Baron, A. Belloni,B. Calvert, S.C. Eno,C. Ferraioli,J.A. Gomez, N.J. Hadley, S. Jabeen, R.G. Kellogg,T. Kolberg, J. Kunkle, Y. Lu, A.C. Mignerey, Y.H. Shin,A. Skuja, M.B. Tonjes,S.C. Tonwar UniversityofMaryland,CollegePark,USA

A. Apyan,R. Barbieri,A. Baty, R. Bi, K. Bierwagen, S. Brandt, W. Busza, I.A. Cali,Z. Demiragli, L. Di Matteo,G. Gomez Ceballos, M. Goncharov,D. Gulhan, Y. Iiyama, G.M. Innocenti, M. Klute, D. Kovalskyi,Y.S. Lai,Y.-J. Lee, A. Levin,P.D. Luckey, A.C. Marini, C. Mcginn,C. Mironov, S. Narayanan, X. Niu,C. Paus, C. Roland, G. Roland,J. Salfeld-Nebgen, G.S.F. Stephans, K. Sumorok, K. Tatar,M. Varma, D. Velicanu,J. Veverka, J. Wang, T.W. Wang, B. Wyslouch, M. Yang,V. Zhukova

MassachusettsInstituteofTechnology,Cambridge,USA

A.C. Benvenuti,B. Dahmes, A. Evans, A. Finkel,A. Gude, P. Hansen, S. Kalafut,S.C. Kao, K. Klapoetke, Y. Kubota,Z. Lesko, J. Mans, S. Nourbakhsh, N. Ruckstuhl, R. Rusack, N. Tambe, J. Turkewitz

UniversityofMinnesota,Minneapolis,USA J.G. Acosta,S. Oliveros UniversityofMississippi,Oxford,USA

E. Avdeeva,R. Bartek, K. Bloom, S. Bose, D.R. Claes,A. Dominguez, C. Fangmeier, R. Gonzalez Suarez, R. Kamalieddin,D. Knowlton, I. Kravchenko, F. Meier, J. Monroy, F. Ratnikov,J.E. Siado,G.R. Snow UniversityofNebraska–Lincoln,Lincoln,USA

M. Alyari,J. Dolen, J. George,A. Godshalk, C. Harrington, I. Iashvili,J. Kaisen, A. Kharchilava, A. Kumar, S. Rappoccio, B. Roozbahani

StateUniversityofNewYorkatBuffalo,Buffalo,USA

G. Alverson, E. Barberis, D. Baumgartel, M. Chasco,A. Hortiangtham, A. Massironi, D.M. Morse, D. Nash, T. Orimoto,R. Teixeira De Lima,D. Trocino, R.-J. Wang, D. Wood, J. Zhang