Using about 1.5 million hadronic Z decays recorded with the aleph detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Λℓ- combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is τb-baryon = 1.05-0.11 +0.12(stat)±0.09(syst) ps. The lifetime of the Λb 0 baryon from a maximum likelihood fit to the proper time distribution of 58 Λc +ℓ- candidates containing a Λb 0 sample of 44 decays, is τΛ = 1.02-0.18 +0.23(stat) ± 0.06(syst) ps.

Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1995). Measurements of the b baryon lifetime. PHYSICS LETTERS. SECTION B, 357(4), 685-698 [10.1016/0370-2693(95)00980-Y].

Measurements of the b baryon lifetime

CARPINELLI, Massimo;
1995

Abstract

Using about 1.5 million hadronic Z decays recorded with the aleph detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Λℓ- combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is τb-baryon = 1.05-0.11 +0.12(stat)±0.09(syst) ps. The lifetime of the Λb 0 baryon from a maximum likelihood fit to the proper time distribution of 58 Λc +ℓ- candidates containing a Λb 0 sample of 44 decays, is τΛ = 1.02-0.18 +0.23(stat) ± 0.06(syst) ps.
Articolo in rivista - Articolo scientifico
Physics
English
1995
357
4
685
698
none
Buskulic, D., Casper, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., et al. (1995). Measurements of the b baryon lifetime. PHYSICS LETTERS. SECTION B, 357(4), 685-698 [10.1016/0370-2693(95)00980-Y].
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/10281/390312
Citazioni
  • Scopus 27
  • ???jsp.display-item.citation.isi??? 25
Social impact