0000000000132642

AUTHOR

M. Della'orso

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

2009

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).

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)Physical Review Letters
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