6533b7defe1ef96bd127663b

RESEARCH PRODUCT

Strong Evidence forZZProduction inpp¯Collisions ats=1.96  TeV

Elliot LipelesM. WeinbergerA. BridgemanD. ShermanA. Savoy-navarroM. HeckA. AurisanoJ. SlaunwhiteAntonio BoveiaPeter WagnerX. ZhangN. GiokarisN. GiokarisT. MiaoL. RistoriD. ChokheliG. CompostellaMaria Agnese CiocciA. Barbaro-galtieriM. M. DeninnoAldo PenzoDaniel JeansK. GibsonR. F. HarrXin WuY. KusakabeR. OldemanR. McnultyR. McnultyM. HareM. TecchioT. MasubuchiN. S. LockyerE. ThomsonG. MancaRoberto RossinS. LamiRoman LysakRoman LysakK. OsterbergA. VarganovTetsuo ArisawaK. ChungJulien DoniniTara ShearsS. CarrilloS. CarrilloKevin LannonT. YamashitaGuenakh MitselmakherGuillelmo Gomez-ceballosJ. AntosJ. AntosJochen Jens HeinrichM. MussiniFrank WürthweinJ. P. FernandezM. JonesL. E. KirschRicardo EusebiE. JamesMichael L. NormanA. ApresyanJulia ThomJulia ThomP. J. BusseyA. J. MartinG. A. ThompsonC. P. MarinoE. RogersA. SohaS. UozumiR. ForrestJ. M. HeuserJ. E. GarciaS. MenzemerS. MenzemerL. PondromE. WicklundS. TkaczykDavid StuartR. G. FeildJ. S. SuhG. P. YehS. BuddP. DongK. GenserD. WatersIvan-kresimir FuricI. LazzizzeraPaul LujanB. R. KoJoe KrollMonica D'onofrioP. BednarP. BednarA. NapierM. P. SchmidtTeresa RodrigoS. Z. ShalhoutR. CarosiSally SeidelJ. DengC. PagliaroneA. AnastassovJim FreemanA. HeijboerJ. LueckD. MacqueenD. MacqueenH. GerberichAmitabh LathVirgil E BarnesNuno LeonardoFumihiko UkegawaS. DonatiKenichi HatakeyamaAnna SfyrlaConor HendersonS. PashapourS. PashapourK. S. McfarlandA. L. ScottP. Azzi-bacchettaP. CatastiniD. E. PellettB. KnutesonC. FerrazzaT. J. PhillipsV. NeculaSam HarperC. BrombergA. DeisherU. KerzelM. BinkleyC. PausM. FranklinPaola GiannettiB. A. BarnettGiorgio ApollinariW. JohnsonYen-jie LeeLouis LyonsJ. MülmenstädtR. LefèvrePaolo AzzurriStanislav TokárStanislav TokárB. T. HuffmanE. BrubakerT. SuzukiMassimo CasarsaV. BoisvertS. B. KimM. G. AlbrowS. De CeccoC. VellidisC. VellidisA. LoginovA. B. WicklundChen YangT. VineRoger MooreD. O. LitvintsevMark NeubauerA. RuizSubir SarkarR. OravaT. R. JunkTeruki KamonCraig BlockerK. K. JooRobert M HarrisC. S. MoonChristina MesropianJeannine Wagner-kuhrP. F. DerwentC.-s. LinT. WrightRong-shyang LuR. CulbertsonV. RusuO. NorniellaS. GrinsteinM. CordelliT. AaltonenF. SpinellaW. TrischukW. TrischukG. P. Di GiovanniN. P. KulkarniV. RamakrishnanM. LoretiKaori MaeshimaM. LancasterV. PapadimitriouG. De LentdeckerG. De LentdeckerFabrizio MargaroliPaolo MastrandreaA. MenzioneD. HareG. BusettoBrian L WinerAndrea CastroNicola BacchettaAidan RobsonD. P. BenjaminE. E. SchmidtK. TerashiC. DionisiR. G. WagnerA. T. LaasanenF. BedeschiJay HauserM. J. KimJ. LysS. H. ChuangE. PalenciaJ. C. CullyJ. PursleyR. RoserIvan VilaG. LunguD. ErredeN. Van RemortelR. D. FieldP. WilsonT. WakisakaB. Di RuzzaD. StentzJ. L. GimmellD. DagenhartMatteo Cavalli-sforzaAndrew BeretvasG. B. YuC. WolfeJ. LeeM. MilnikU. HusemannB. ÁLvarez GonzálezT. SpreitzerT. SpreitzerA. PronkoM. CampbellR. St. DenisP. MuratBeate HeinemannY. KatoV. BartschM. E. ConveryLuca ScodellaroP. RoyP. RoyM. A. SchmidtS. E. KuhlmannP. Movilla FernandezJ. N. BellingerJ. Guimaraes Da CostaA. RahamanD. TonelliJ. EfronJ. P. ChouJonas RademackerJonas RademackerG. LatinoP. MehtalaR. HandlerY. S. ChungR. SnihurR. SnihurI. ShreyberJahred AdelmanT. DaviesL. NodulmanI. V. GorelovK. L. ByrumS. TorreC. S. HillC. S. HillS. KwangR. KephartS. BehariA. NaganoA. SedovKevin BurkettM. A. HouldenJ. BoudreauL. LovasL. LovasL. Sexton-kennedyI. SuslovA. MitraJason NielsenJason NielsenB. CasalChristopher NeuP. GirominiV. TiwariAnna ZanettiKoji NakamuraMaxim GoncharovV. GiakoumopolouV. GiakoumopolouM. MartinSandra LeoneS. CabreraS. CabreraAndrew MehtaJacobo KonigsbergD. LucchesiBernd StelzerY. TakeuchiS. HewamanageSinead FarringtonS. W. LeeS. W. LeeMaxwell ChertokEmily NurseJoe IncandelaM. GoldL. SartoriMarkus KluteX. PortellN. MoggiA. N. SisakyanG. BauerM. J. MorelloF. D. SniderJ. Y. HanS. WolbersCorrinne MillsJ. YohW. BadgettA. PapaikonomouM. ShimojimaM. ShimojimaJ. R. SmithGervasio GomezTiehui LiuW. K. SakumotoS. RichterMichal KrepsD. H. KimAndreas WarburtonAndreas WarburtonT. AkimotoN. KrumnackDaniel WhitesonDaniel WhitesonRainer WallnyAlexander ParamonovMichael SchmittY. D. OhN. KimuraM. HartzS. M. WynneK. CopicStephan LammelU. K. YangU. K. YangAndrey KorytovB. Y. HanH. MiyakeC. Grosso-pilcherI. OksuzianI. ZawS. ZucchelliR. E. BlairF. RimondiG. PunziN. GoldschmidtA. BodekGeorgios ChoudalakisI. BizjakS. R. HahnD. W. GerdesGino BollaD. TorrettaJ. KrausFabrizio ScuriK. MakhoulManfred PauliniManuela CampanelliH. SunR. VidalF. HappacherDario BiselloL. ZanelloA. GolossanovThomas LecompteA. SidotiK. TollefsonG. FlanaganJ. ConwayM. StanitzkiT. MakiF. GarbersonMauro Dell'orsoLucio CerritoLucio CerritoMarjorie ShapiroC. P. MarinoTracey BerryS. CarronS. CarronC. HaberC. M. GinsburgA. BhattiG. IntrozziPetra MerkelO. SaltóP. F. ShepardS. H. OhB. D. CooperA. V. KotwalR. TakashimaA. SemenovDuncan CarlsmithD. ClarkS. LaiS. LaiM. SoderbergE. J. JeonS. C. HsuB. WhitehouseViktor VeszpremiS. Y. JunS. MoedO. PoukhovThomas SchwarzClaudio LuciG. WilliamsG. WilliamsB. JayatilakaVyacheslav KrutelyovJ. C. YunReisaburo TanakaGuido VolpiAndrew D. HamiltonJ. PatrickA. SukhanovM. E. MattsonP. MackJ. StrologasP. SinervoP. SinervoIgor VolobouevIgor VolobouevO. GonzálezR. L. WagnerOliver Stelzer-chiltonM. FeindtS. H. ChangH. S. BuddP. SchlabachItsuo NakanoYongsun KimK. GoulianosJ. SpaldingY. C. ChenJ. E. JungS. ForresterAlan GarfinkelP. McintyreB. IyutinH. S. KimW. C. WesterL. SantiGiorgio ChiarelliR. MumfordT. TomuraS. Pagan GrisoR. J. MillerJane NachtmanWolfgang WagnerS. BaroiantDean HidasA. MukherjeeV. V. GlagolevIgnacio RedondoP. De BarbaroJ. LinacreB. ParksJames RussN. PounderD. TobackK. T. PittsJ. MilesRobin ErbacherM. DattaW-m. YaoKohei YoritaA. GreseleD. GlenzinskiM. RossiAndrea BocciA. ArtikovM. IoriA. AttalT. KuboS. AmerioTommaso DorigoSong-ming WangS. A. KoayF. AzfarAlessandro CerriMatthew HerndonR. VilarA. ManousakisA. ManousakisS. SomalwarDeepak KarS. RolliBenjamin KilminsterG. PiacentinoF. VázquezF. VázquezG. CortianaBarry BlumenfeldM. AokiY. C. YangE. VatagaP. SquillaciotiKazuhiko HaraC. I. CiobanuR. Martínez-ballarínFrank ChlebanaF. PtohosF. PtohosH. SaarikkoJ. BeringerL. PineraS. LevyN. MiladinovicS. MaldeAlberto BelloniA. J. SlaughterN. RanjanT. OkusawaT. ScheidleP. MazzantiA. BuzatuA. BuzatuAvraham YagilH. C. FangA. CanepaG. De LorenzoJ. HustonMariopaolo GiordaniUlysses GrundlerY. ZhengY. ZhengG. SalamannaC. Cuenca AlmenarC. Cuenca AlmenarSofia VallecorsaS. H. KimM. LindgrenA. BolshovM. J. ShochetJavier CuevasJavier CuevasG. ChlachidzeTomoko YoshidaKristian Allan HahnK. KondoP. H. BeaucheminP. H. BeaucheminG. PaulettaJ. D. LewisL. BrigliadoriI. YuW. H. ChungTh. MüllerV. SorinK. SliwaS. KlimenkoA. MessinaKoji YamamotoY. ShonAlberto AnnoviP. K. TengV. KhotilovichY. SeiyaKeunchang ChoW. AshmanskasSudhir MalikM. VidalD. De PedisJ. E. KimR. E. HughesPetar MaksimovicL. DemortierS. DubeJay DittmannB. BrauP. B. RentonS. S. YuD. CauzG. VelevJ. ProudfootD. HirschbuehlH. H. WilliamsVladimir RekovicChris HaysM. GiuntaC. S. LinY. TuMarcelo VogelSergo JindarianiC. PlagerF. CanelliStefano GiaguE. LytkenAlexei SafonovJ. BudagovT. KuhrR. L. LanderJ. PiedraD. J. KongA. ScribanoMichele GallinaroT. MaruyamaAndrew IvanovGiovanni BellettiniP. LukensPeter WittichPeter WittichN. TuriniDaniela BortolettoW. T. FedorkoP. E. KarchinM. MartinezA. S. ThompsonAnyes TaffardAnyes TaffardM. RescignoA. G. ClarkS. TourneurVictoria Jane MartinVictoria Jane MartinA. HockerJ. YamaokaMark KruseAlison ListerPaul TiptonJ. GalyardtD. AmideiA. T. GoshawB. ReisertZ. Gunay-unalanKatsufumi SatoS. R. HouS. ErredeYasuyoshi NagaiFrancesco CrescioliR. MadrakJ. NaganomaEva HalkiadakisF. Prakoshyn

subject

PhysicsParticle physics010308 nuclear & particles physicsHadronTevatronGeneral Physics and Astronomy01 natural sciencesPrime (order theory)LuminosityStandard ModelNuclear physicsPair production0103 physical sciencesHigh Energy Physics::ExperimentProduction (computer science)010306 general physicsBoson

description

We report the first measurement of the cross section for Z boson pair production at a hadron collider. This result is based on a data sample corresponding to 1.9 fb{sup -1} of integrated luminosity from p{bar p} collisions at {radical}s = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. In the {ell}{ell}{ell}{prime}{ell}{prime} channel, we observe three ZZ candidates with an expected background of 0.096{sub -0.063}{sup +0.092} events. In the {ell}{ell}{nu}{nu} channel, we use a leading-order calculation of the relative ZZ and WW event probabilities to discriminate between signal and background. In the combination of {ell}{ell}{ell}{prime}{ell}{prime} and {ell}{ell}{nu}{nu} channels, we observe an excess of events with a probability of 5.1 x 10{sup -6} to be due to the expected background. This corresponds to a significance of 4.4 standard deviations. The measured cross section is {sigma}(p{bar p} {yields}ZZ) = 1.4{sub -0.6}{sup +0.7} (stat.+syst.) pb, consistent with the standard model expectation.

https://doi.org/10.1103/physrevlett.100.201801