6533b7d4fe1ef96bd126307b

RESEARCH PRODUCT

Measurement of the fraction oftt¯production via gluon-gluon fusion inpp¯collisions ats=1.96  TeV

Jay HauserF. PrakoshynB. Y. HanB. WhitehouseViktor VeszpremiS. Y. JunL. CerritoL. CerritoY. ZhengY. ZhengSofia VallecorsaS. H. KimAmitabh LathAnna SfyrlaPaola GiannettiB. A. BarnettGiorgio ApollinariRobin ErbacherRobin ErbacherM. DattaF. PtohosF. PtohosW-m. YaoT. R. JunkA. AttalT. KuboA. Savoy-navarroC. WolfeL. PineraT. ScheidleG. ChlachidzeP. Movilla FernandezJ. P. ChouL. BrigliadoriA. NaganoA. SedovTeruki KamonP. MazzantiR. F. HarrM. KurataJ. D. LewisS. MaldeAndrew IvanovTetsuo ArisawaM. HeckD. BeecherS. BuddP. DongA. V. KotwalBeate HeinemannK. TollefsonGino BollaS. CarrilloS. CarrilloK. ChungAvraham YagilH. C. FangK. GenserL. DemortierTh. MüllerV. SorinCraig BlockerA. CanepaA. ElaginS. DubeJulien DoniniK. SliwaJoe KrollS. KlimenkoA. ApresyanDaniela BortolettoP. E. KarchinKaori MaeshimaCorrinne MillsA. ScribanoJ. R. SmithM. JonesM. M. DeninnoJ. KeungJ. N. BellingerElisabetta PianoriD. MacqueenH. GerberichPaolo MastrandreaPaul LujanS. C. HsuS. TorreP. J. BusseyD. TorrettaJay DittmannG. VelevM. P. SchmidtA. PenzoStephan LammelY. TakeuchiPetra MerkelMariopaolo GiordaniR. KephartD. CauzD. HirschbuehlA. MitraMonica D'onofrioP. BednarAlberto AnnoviB. KnutesonMichael L. NormanG. PiacentinoJulia ThomJulia ThomV. KhotilovichA. J. MartinC. VellidisRoman LysakJe JungY. SeiyaSi XieMark NeubauerSubir SarkarUlysses GrundlerN. MoggiL. PondromE. WicklundFumihiko UkegawaR. OravaE. J. JeonJason NielsenJason NielsenB. CasalA. SukhanovMichele GallinaroChuan-ming LiuM. E. MattsonPeter WittichPeter WittichT. TomuraC. FerrazzaR. McnultyR. McnultyM. HareM. TecchioG. LunguI. LazzizzeraS. Pagan GrisoA. AnastassovA. SemenovD. ClarkClaudio LuciA. LoginovA. B. WicklundE. LytkenO. SaltóR. D. FieldG. PunziJmv GarciaK. S. McfarlandR. VidalA. L. ScottJ. MülmenstädtB. R. KoG. MancaI. SuslovS. HewamanageSinead FarringtonB. BrauL. OakesJane NachtmanA. VarganovS. TkaczykDavid StuartKyung-suk ChoR. E. HughesT. RodriguezPetar MaksimovicA. BodekThomas SchwarzIgor VolobouevIgor VolobouevP. MackIgnacio RedondoHyun-chul KimC. M. GinsburgS. ShiraishiP. F. ShepardS. H. OhS. KwangK. CopicS. R. HahnElliot LipelesH. S. BuddThomas LecompteB. JayatilakaL. ZanelloA. GolossanovShih-fu ChangAlessandro CerriS. TourneurVictoria Jane MartinVictoria Jane MartinS. DonatiKenichi HatakeyamaK. K. JooAndrew MehtaR. G. FeildJ. S. SuhJ. SpaldingJacobo KonigsbergP. TotaroMaxwell ChertokAlexander ParamonovP. CatastiniGeorgios ChoudalakisI. BizjakE. E. SchmidtD. StentzD. DagenhartT. KuhrGiovanni BellettiniM. FranklinS. CabreraS. CabreraK. T. PittsR. J. MillerReisaburo TanakaGuido VolpiM. LindgrenTomoko YoshidaKristian Allan HahnConor HendersonM. BinkleyS. H. ChuangP. WilsonWolfgang WagnerMatteo Cavalli-sforzaO. GonzálezItsuo NakanoM. WeinbergerA. BridgemanD. ShermanM. RescignoH. H. WilliamsG. IntrozziG. P. YehC. BrombergA. DeisherW. C. WesterP. SquillaciotiKazuhiko HaraJ. RademackerJ. RademackerM. G. AlbrowEmily NurseA. MukherjeeA. PronkoY. TuAlan GarfinkelO. PoukhovJ. PatrickT. MiaoD. ChokheliJ. BeringerN. MiladinovicA. J. SlaughterP. B. RentonA. NapierIvan-kresimir FuricY. D. OhJ. C. FreemanM. FeindtSergo JindarianiS. RichterA. RuizJ. ProudfootM. RossiT. WakisakaK. KondoAndrea BocciTommaso DorigoV. A. GiakoumopoulouA. ArtikovA. AurisanoJ. SlaunwhiteAntonio BoveiaT. DaviesMichal KrepsVirgil E BarnesE. PueschelT. WrightS. S. YuK. GibsonS. PashapourSandra LeoneP. SchlabachX. ZhangN. GiokarisT. OkusawaA. BuzatuA. BuzatuTeresa RodrigoXin WuA. HockerW. JohnsonT. J. PhillipsV. NeculaSam HarperLouis LyonsGiuseppe LatinoJ. BudagovJ. YamaokaC. DelucaFabrizio ScuriA. Barbaro-galtieriP. H. BeaucheminPeter McintyreVladimir RekovicChris HaysM. GiuntaG. PaulettaA. SchmidtS. GrinsteinP. MehtalaT. AaltonenM. J. KimA. MenzioneT. MasubuchiV. PapadimitriouW. K. SakumotoMaria Agnese CiocciG. De LorenzoJ. HustonC. P. MarinoMark KruseAlison ListerF. ChlebanaDaniel WhitesonDaniel WhitesonSong-ming WangPaolo AzzurriS. A. KoayF. AzfarP. MuratR. L. LanderS. CarronDuncan CarlsmithFabrizio MargaroliR. VilarA. N. SisakyanMatthew HerndonMarcelo VogelN. S. LockyerE. ThomsonRoberto RossinJ. LinacreE. PalenciaAndrew BeretvasJ. C. CullyM. K. JhaC. Grosso-pilcherI. OksuzianN. GoldschmidtPaul TiptonKevin LannonJahred AdelmanL. NodulmanD. J. KongT. MaruyamaB. ParksJames RussKohei YoritaN. P. KulkarniW. BadgettG. CortianaY. C. YangE. VatagaY. KusakabeD. GlenzinskiTara ShearsV. RamakrishnanC. DionisiS. RolliBenjamin KilminsterGuenakh MitselmakherJ. MorlokA. RahamanJ. GalyardtP. LukensA. PapaikonomouD. WatersJ. LysJ. StrologasD. KropH. SaarikkoW. H. ChungM. ShimojimaM. ShimojimaN. PounderD. AmideiAidan RobsonR. RoserIvan VilaM. J. ShochetC. PlagerF. CanelliChristopher NeuGuillelmo Gomez-ceballosJ. AntosBarry BlumenfeldA. T. GoshawB. ReisertD. P. BenjaminTiehui LiuDaijin KimG. BauerP. WagnerM. J. MorelloD. ErredeRong-shyang LuF. D. SniderJ. Y. HanP. SinervoAndreas WarburtonA. GreseleRodolfo CarosiM. MussiniN. Van RemortelN. Van RemortelChristoph PausS. W. LeeS. W. LeeE. JamesW. T. FedorkoStefano GiaguU. K. YangU. K. YangJ. CuevasJ. CuevasH. MiyakeM. MartinezG. B. YuA. S. ThompsonS. WolbersRobert M HarrisF. HappacherK. OsterbergY. KatoB. T. HuffmanJ. YohV. BartschJ. Guimaraes Da CostaD. TonelliDario BiselloA. BhattiFrank WürthweinAnyes TaffardAnyes TaffardD. W. GerdesD. J. CoxZ. Gunay-unalanT. SpreitzerF. VázquezF. VázquezKatsufumi SatoMassimo CasarsaJ. P. FernandezKoji YamamotoY. ShonR. St. DenisA. Manousakis-katsikakisS. R. HouT. VineP. K. TengC. Cuenca AlmenarC. Cuenca AlmenarC. S. HillC. S. HillM. IoriAndrea CastroS. ErredeYasuyoshi NagaiFrancesco CrescioliAlexei SafonovC. CalanchaI. V. GorelovW. AshmanskasSudhir MalikM. A. HouldenM. VidalR. MadrakJ. NaganomaL. E. KirschJeannine Wagner-kuhrM. E. ConveryLuca ScodellaroS. AmerioGervasio GomezM. MilnikU. HusemannK. L. ByrumP. GirominiN. RanjanR. ForrestV. TiwariRicardo EusebiEva HalkiadakisI. ShreyberB. ÁLvarez GonzálezB. Di RuzzaS. LamiR. CulbertsonO. NorniellaAnna ZanettiAndrey KorytovS. SomalwarDeepak KarJoe IncandelaC. I. CiobanuR. Martínez-ballarínK. MakhoulManfred PauliniManuela CampanelliR. TakashimaJ. C. YunOliver Stelzer-chiltonYongsun KimJ. E. KimY. C. ChenL. SantiGiorgio ChiarelliR. MumfordMichael SchmittN. KimuraM. HartzS. M. WynneG. FlanaganJ. ConwayE. LeeM. StanitzkiViviana CavaliereJ. M. HeuserA. HeijboerJ. LueckD. E. PellettE. BrubakerC. S. LinT. SuzukiAntonio SidotiD. HareM. CampbellJ. EfronR. HandlerY. S. ChungL. LovasC. S. MoonM. CordelliG. BusettoBrian L WinerR. G. WagnerM. A. SchmidtKoji NakamuraI. ZawS. ZucchelliR. E. BlairF. RimondiL. RistoriKevin BurkettAllan G ClarkRoger MooreD. O. LitvintsevSooran KimChristina MesropianG. P. Di GiovanniM. LoretiK. TerashiNicola TuriniA. T. LaasanenJochen Jens HeinrichG. A. ThompsonC. P. MarinoE. RogersA. SohaS. Z. ShalhoutJ. DengRainer WallnyT. MakiF. GarbersonMauro Dell'orsoC. HaberG. WilliamsG. GiurgiuS. De CeccoA. GesslerP. F. DerwentV. RusuM. LancasterJ. PursleyR. SnihurS. BehariJ. BoudreauL. Sexton-kennedyG. CompostellaMaxim GoncharovT. AkimotoN. KrumnackDean HidasV. V. GlagolevC. PagliaroneStanislav TokárV. BoisvertP. RoyD. LucchesiBernd StelzerR. L. WagnerK. GoulianosP. De BarbaroFranco BedeschiD. TobackM. GoldL. SartoriIntae YuVyacheslav KrutelyovSally SeidelJ. L. Gimmell

subject

PhysicsNuclear and High Energy PhysicsTop quarkParticle physicsAnnihilationLuminosity (scattering theory)010308 nuclear & particles physicsTevatron01 natural sciencesGluonNuclear physicsParticle decay0103 physical sciencesFermilab010306 general physicsLepton

description

We present a measurement of the ratio of the tt production cross section via gluon-gluon fusion to the total tt production cross section in pp collisions at √s=1.96  TeV at the Tevatron. Using a data sample with an integrated luminosity of 955  pb-1 recorded by the CDF II detector at Fermilab, we select events based on the tt decay to lepton+jets. Using an artificial neural network technique we discriminate between tt events produced via qq annihilation and gg fusion, and find Gf=σ(gg→tt )/σ(pp →tt )<0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, Gf=0.07-0.07+0.15.

yearjournalcountryeditionlanguage
2009-02-23Physical Review D
https://doi.org/10.1103/physrevd.79.031101