Second order direct CP asymmetry in B_(s) -> X l nu

Abstract

A direct CP asymmetry in inclusive semileptonic B_(s) decays vanishes by CPT to lowest order in weak interactions. Calculating the asymmetry at second order weak interactions in the Cabibbo-Kobayashi-Maskawa framework we find A_{sl} = (-3.2 \pm 0.9) x 10^{-9}. A maximal asymmetry which is two orders of magnitude larger is estimated in a left-right symmetric model. This quite generic upper bound implies negligible effects on wrong-sign lepton asymmetries in B^0 and B_s decays.

13 pages, 3 figures. A few changes and new references, separate section on decays to wrong-sign leptons; some clarifications

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• Theoretical update of Bs-Bs-bar mixing
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Cited by in corpus (9)

• Measurement of CP--violating asymmetries in D0 --> pi+ pi- and D0 --> K+K- decays at CDF
• Decoding (Pseudo)-Scalar Operators in Leptonic and Semileptonic $B$ Decays
• Study of CP-violating charge asymmetries of single muons and like-sign dimuons in p pbar collisions
• Understanding the like-sign dimuon charge asymmetry in $p\bar{p}$ collisions
• Measurements of charge and CP asymmetries in $b$-hadron decays using top-quark events collected by the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
• On the origin of the D0 like-sign dimuon charge asymmetry
• Reconciling anomalous measurements in $B_s-{\bar{B}}_s$ mixing: the role of CPT-conserving and CPT-violating new physics
• $B_s^0$-${\bar{B}}_s^0$ Oscillations as a New Tool to Explore CP Violation in $D_s^{\pm }$ Decays
• Comment on "A possible explanation of the D0 like-sign dimuon charge aymmetry"