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Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb.sup.-1./sup. of p pbar collisions

SYSNO ASEP	0367905
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb^-1 of p pbar collisions
Author(s)	Abazov, V. M. (RU) Abbott, B. (US) Acharya, B.S. (IN) Kupčo, Alexander (FZU-D)_{RID, ORCID} Lokajíček, Miloš (FZU-D)_{RID, ORCID}
Number of authors	420
Source Title	Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998 Roč. 84, č. 5 (2011), "052007-1"-"052007-24"
Number of pages	24 s.
Language	eng - English
Country	US - United States
Keywords	D0 ; Tevatron ; dimuon ; asymmetry
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LA08047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000295008600001
DOI	10.1103/PhysRevD.84.052007
Annotation	We present an updated measurement of the anomalous like-sign dimuon charge asymmetry Aslb for semi-leptonic b-hadron decays in 9.0 fb^-1 of p pbar collisions recorded with the D0 detector at a center-of-mass energy of sqrt{s} = 1.96 TeV at the Fermilab Tevatron collider. We obtain Aslb = (-0.787 +- 0.172(stat) +- 0.093 (syst))%. This result differs by 3.9 standard deviations from the prediction of the standard model and provides evidence for anomalously large CP violation in semi-leptonic neutral B decay. The dependence of the asymmetry on the muon impact parameter is consistent with the hypothesis that it originates from semi-leptonic b-hadron decays.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2013

Number of the records: 1