A measurement of b+ and b-0 lifetimes using (d)over-bar-l(+) events

A measurement of b+ and b-0 lifetimes using (d)over-bar-l(+) events

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A measurement of b+ and b-0 lifetimes using (d)over-bar-l(+) events

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DELPHI Collaboration; Castillo Giménez, María Victoria Perfil; Ferrer Soria, Antonio Perfil; Higón Rodríguez, Emilio Perfil; Chrin, J. T. M.; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Hernando Morata, José Ángel; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martínez Vidal, Fernando Perfil; Martí García, Salvador; Navas Concha, Sergio; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio
This document is a artículoDate1995

Este documento está disponible también en : http://dx.doi.org/10.1007/BF01579800

Este documento está disponible también en : http://hdl.handle.net/10550/35186
A measurement of B meson lifetimes is presented using data collected from 1991 to 1993 by the DELPHI detector at the LEP collider. Samples of events with a D meson and a lepton in the same jet are selected where D¯0ℓ+ and D*ℓ+ events originate mainly from the semileptonic decays of B+ and B0 mesons, respectively. From the reconstructed B decay length and the estimated B momentum, taking into account the dilution due to B decays into D¯∗∗ℓ+v , the following B meson lifetimes and lifetime ratio are measured: τ(B+)=1.61+0.16−0.16(stat.)±0.12(syst.)psτ(B0)=1.61+0.14−0.13(stat.)±0.08(syst.)psτ(B+)/τ(B0)=1.00+0.17−0.15(stat.)±0.10(syst.) and an average lifetime of B+ and B0 mesons is obtained: τ(B)=1.61+0.08−0.07(stat.)±0.05(syst.)ps

    DELPHI Collaboration Castillo Giménez, María Victoira Ferrer Soria, Antonio Higón Rodríguez, Emilio 1995 A measurement of b+ and b-0 lifetimes using (d)over-bar-l(+) events Zeitschrift für Physik C-Particles and Fields 68 1 13 23

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