The B0 - B̄0 average mixing parameter χ̄ and b forward-backward asymmetry AFB0(b) are measured from a sample of about 4200000 Z → qq̄ events recorded with the ALEPH detector at LEP in the years 1990-1995. High transverse momentum electrons and muons produced in b semileptonic decays provide the tag of the quark flavour and of its charge. The average mixing parameter and the pole b asymmetry are measured to be χ̄ = 0.1246 ± 0.0051stat ± 0.0052syst, AFB0(b) = 0.1008 ± 0.0043stat ± 0.0028syst. The value of sin2θWeff = 0.23198 ± 0.00092 is extracted from the asymmetry measurement.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons. PHYSICS LETTERS. SECTION B, 384(1-4), 414-426 [10.1016/0370-2693(96)00926-4].

Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons

CARPINELLI, Massimo;
1996

Abstract

The B0 - B̄0 average mixing parameter χ̄ and b forward-backward asymmetry AFB0(b) are measured from a sample of about 4200000 Z → qq̄ events recorded with the ALEPH detector at LEP in the years 1990-1995. High transverse momentum electrons and muons produced in b semileptonic decays provide the tag of the quark flavour and of its charge. The average mixing parameter and the pole b asymmetry are measured to be χ̄ = 0.1246 ± 0.0051stat ± 0.0052syst, AFB0(b) = 0.1008 ± 0.0043stat ± 0.0028syst. The value of sin2θWeff = 0.23198 ± 0.00092 is extracted from the asymmetry measurement.
Articolo in rivista - Articolo scientifico
Physics
English
1996
384
1-4
414
426
none
Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1996). Measurement of the b forward-backward asymmetry and mixing using high-p⊥ leptons. PHYSICS LETTERS. SECTION B, 384(1-4), 414-426 [10.1016/0370-2693(96)00926-4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390215
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