6533b7d0fe1ef96bd125b6e9

RESEARCH PRODUCT

Direct Bound on the Total Decay Width of the Top Quark inpp¯Collisions ats=1.96  TeV

Gino BollaJ. D. LewisJ. KeungSally SeidelD. TorrettaJ. M. HeuserC. WolfeD. KropAlberto AnnoviD. AmideiV. KhotilovichY. SeiyaT. DaviesA. SemenovD. ClarkClaudio LuciA. HeijboerJ. LueckBeate HeinemannA. T. GoshawSandra LeoneKyung-suk ChoB. ReisertR. E. HughesT. RodriguezD. E. PellettJ. L. GimmellPetar MaksimovicJ. N. BellingerE. BrubakerT. SuzukiB. Y. HanL. RistoriWolfgang WagnerKevin BurkettAntonio SidotiJ. ProudfootW. K. SakumotoF. PrakoshynV. A. GiakoumopoulouZ. Gunay-unalanKatsufumi SatoK. TollefsonD. HareElisabetta PianoriM. P. SchmidtS. R. HouS. ErredeYasuyoshi NagaiFrancesco CrescioliA. V. KotwalM. CampbellJ. EfronR. HandlerY. S. ChungIvan-kresimir FuricY. D. OhL. LovasRainer WallnyC. Grosso-pilcherI. OksuzianS. C. HsuR. MadrakVladimir RekovicChris HaysMichael SchmittN. KimuraM. HartzS. M. WynneJ. NaganomaP. MuratRoger MooreD. O. LitvintsevM. GiuntaG. FlanaganN. GoldschmidtS. PashapourJ. ConwayE. LeeM. 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subject

PhysicsTop quarkParticle physics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyTevatronGeneral Physics and Astronomy01 natural sciencesComputer Science::Computers and SocietyLower limitNuclear physicsParticle decayNonlinear Sciences::Exactly Solvable and Integrable Systems0103 physical sciencesPhysics::Atomic and Molecular ClustersHigh Energy Physics::Experiment010306 general physicsCollider Detector at FermilabBar (unit)

description

We present the first direct experimental bound on the total decay width of the top quark, Gamma(t), using 955 pb(-1) of the Tevatron's p (p) over bar collisions recorded by the Collider Detector at Fermilab. We identify 253 top-antitop pair candidate events. The distribution of reconstructed top quark mass from these events is fitted to templates representing different values of the top quark width. Using a confidence interval based on likelihood-ratio ordering, we extract an upper limit at 95% C.L. of Gamma(t) < 13.1 GeV for an assumed top quark mass of 175 GeV/c(2).

yearjournalcountryeditionlanguage
2009-01-28Physical Review Letters
https://doi.org/10.1103/physrevlett.102.042001