6533b7d2fe1ef96bd125e89e
RESEARCH PRODUCT
A measurement of b+ and b-0 lifetimes using (d)over-bar-l(+) events
Delphi CollaborationMaría Victoria Castillo GiménezAntonio Ferrer SoriaEmilio Higón RodríguezJ. T. M. ChrinEduardo Cortina GilAntonio Ferrer SoriaJuan A. Fuster VerdúCarmen García GarcíaJuan José Gómez CadenasJuan José Hernández ReyJosé ÁNgel Hernando MorataCarlos Lacasta LlácerJosé Julio Lozano BahiloFernando Martínez VidalSalvador Martí GarcíaSergio Navas ConchaJosé Salt CairolsJuan Antonio Valls Ferrersubject
High Energy Physics::PhenomenologyHigh Energy Physics::ExperimentAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsNuclear ExperimentPartícules (Física nuclear)Detectors de radiaciódescription
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
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 |