A lower limit on the oscillation frequency of the B0SB0S system is obtained from approximately four million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1995. Leptons are combined with opposite sign D-S candidates reconstructed in seven different decay modes as evidence of semileptonic B0S decays. Criteria designed to ensure precise proper time reconstruction select 277 D-Sl+ combinations. The initial state of these B0S candidates is determined using an algorithm optimized to efficiently utilise the tagging information available for each event. The limit at 95% confidence level on the B0SB0S oscillation frequency is Δms > 6.6 ps-1. The same data is used to update the measurement of the B0S lifetime, τs = 1.54 +0.14-0.13, (stat) ± 0.04 (syst) ps.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). Study of the B0sB0s oscillation frequency using D-s ℓ+ combinations in Z decays. PHYSICS LETTERS. SECTION B, 377(1-3), 205-221 [10.1016/0370-2693(96)00451-0].

Study of the B0sB0s oscillation frequency using D-s ℓ+ combinations in Z decays

CARPINELLI, Massimo;
1996

Abstract

A lower limit on the oscillation frequency of the B0SB0S system is obtained from approximately four million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1995. Leptons are combined with opposite sign D-S candidates reconstructed in seven different decay modes as evidence of semileptonic B0S decays. Criteria designed to ensure precise proper time reconstruction select 277 D-Sl+ combinations. The initial state of these B0S candidates is determined using an algorithm optimized to efficiently utilise the tagging information available for each event. The limit at 95% confidence level on the B0SB0S oscillation frequency is Δms > 6.6 ps-1. The same data is used to update the measurement of the B0S lifetime, τs = 1.54 +0.14-0.13, (stat) ± 0.04 (syst) ps.
Articolo in rivista - Articolo scientifico
Physics
English
1996
377
1-3
205
221
none
Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). Study of the B0sB0s oscillation frequency using D-s ℓ+ combinations in Z decays. PHYSICS LETTERS. SECTION B, 377(1-3), 205-221 [10.1016/0370-2693(96)00451-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390226
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