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

AuthorsAaltonen, T.; Álvarez González, B.; Casal, Bruno ; Cuevas, Javier ; Gómez, G. ; Palencia, Enrique ; Rodrigo, Teresa ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; Zucchelli, S.; Cabrera, Susana ; Cuenca Almenar, Cristóbal ; Ruiz Jimeno, Alberto ; CDF Collaboration
Issue Date24-Mar-2011
PublisherAmerican Physical Society
CitationPhysical Review Letters 106(12): 121804 (2011)
AbstractWe report on a measurement of b-hadron lifetimes in the fully reconstructed decay modes B+→J/ψK+, B0→J/ψK*(892)0, B0→J/ψKs0, and Λb0→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(Λb0)=[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(Λb0)/τ(B0)=[1.020±0.030(stat)±0.008(syst)]. These are the most precise determinations of these quantities from a single experiment.
Description8 páginas, 2 figuras, 1 tabla.-- Grupo de trabajo: CDF Collaboration.-- PACS numbers: 13.25.Hw, 13.30.Eg, 14.20.Mr, 14.40.Nd.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.106.121804
Appears in Collections:(IFIC) Artículos
(IFCA) Artículos
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