Measurement of the b forward - backward asymmetry and mixing using high p(T) leptons

, ALEPH Collaboration (1996) Measurement of the b forward - backward asymmetry and mixing using high p(T) leptons. Physics Letters B, 384 (1-4). pp. 414-426. ISSN 0370-2693

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Abstract

The B0 - B̄0 average mixing parameter and b forward-backward asymmetry AFB0(b) are measured from a sample of about 4 200 000 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 = 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.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
64048
Deposited By:
Deposited On:
09 May 2013 15:51
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Nov 2020 03:34