Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb${^-1}$ of $p\bar{p}$ collisions
(2011) Physical review D — Vol. 84 (2011)
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- Abstract
- 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 marc: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.
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Tanasijczuk, A. J., D0, & et al. (2011). Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb${^-1}$ of $p\bar{p}$ collisions. Physical review D, 84. https://doi.org/10.1103/PhysRevD.84.052007 (Original work published 2011)