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/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.

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

PAGLIARONE, Carmine Elvezio;
2011-01-01

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/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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11580/19513
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
social impact