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

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

2010-08-25

arxiv.org/abs/1008.4354v3

Phys.Lett.B694:374-379,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/j.physletb.2010.10.025

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.

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