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Title

Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/ψ in pp Collisions at √s=1.96  TeV

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2011, vol. 106, no. 12, p. 121804
Abstract We report on a measurement of b-hadron lifetimes in the fully reconstructed decay modes B+→J/ψK+, B0→J/ψK∗(892)0, B0→J/ψK0s, and Λ0b→J/ψΛ0 using data corresponding to an integrated luminosity of 4.3  fb−1, collected by the CDF II detector at the Fermilab Tevatron. The measured lifetimes are τ(B+)=[1.639±0.009(stat)±0.009(syst)]  ps, τ(B0)=[1.507±0.010(stat)±0.008(syst)]  ps, and τ(Λ0b)=[1.537±0.045(stat)±0.014(syst)]  ps. The lifetime ratios are τ(B+)/τ(B0)=[1.088±0.009(stat)±0.004(syst)] and τ(Λ0b)/τ(B0)=[1.020±0.030(stat)±0.008(syst)]. These are the most precise determinations of these quantities from a single experiment.
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CDF COLLABORATION. Measurement of b Hadron Lifetimes in Exclusive Decays Containing a J/ψ in pp Collisions at √s=1.96  TeV. In: Physical Review Letters, 2011, vol. 106, n° 12, p. 121804. https://archive-ouverte.unige.ch/unige:38664

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Deposited on : 2014-07-15

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