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Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb(-1) of p(p)over-bar collisions
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2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 84, no 5, 052007- p.Article in journal (Refereed) Published
Abstract [en]

We present an updated measurement of the anomalous like-sign dimuon charge asymmetry A(sl)(b) for semileptonic b-hadron decays in 9.0 fb(-1) of p (p) over bar collisions recorded with the D0 detector at a center-of-mass energy of root s = 1.96 TeV at the Fermilab Tevatron collider. We obtain A(sl)(b) = (-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 semileptonic neutral B decay. The dependence of the asymmetry on the muon impact parameter is consistent with the hypothesis that it originates from semileptonic b-hadron decays.

Place, publisher, year, edition, pages
2011. Vol. 84, no 5, 052007- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-159786DOI: 10.1103/PhysRevD.84.052007ISI: 000295008600001OAI: oai:DiVA.org:uu-159786DiVA: diva2:447168
Available from: 2011-10-11 Created: 2011-10-10 Last updated: 2011-10-11Bibliographically approved

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