Light Rays of New Physics: CP Violation in B -> Xs gamma Decays

Details Light Rays of New Physics: CP Violation in B -> Xs gamma Decays Light Rays of New Physics: CP Violation in B -> Xs gamma Decays

1998-09-11

arxiv.org/abs/hep-ph/9809343v1

Nucl.Phys.Proc.Suppl. 74 (1999) 260-267

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 figures, uses ltwol2e.sty (included); to appear in the Proceedings of the QCD 98 Euroconference (Montpellier) and o

Scientific paper

10.1016/S0920-5632(99)00175-9

The observation of a sizable CP asymmetry in the inclusive decays B -> Xs gamma would be a clean signal of New Physics. In the Standard Model, this asymmetry is below 1 % in magnitude. In extensions of the Standard Model with new CP-violating couplings, large asymmetries are possible without conflicting with the experimental value of the B -> Xs gamma branching ratio. In particular, large asymmetries arise naturally in models with enhanced chromo-magnetic dipole transitions. Some generic examples of such models are explored and their implications for the semileptonic branching ratio and charm yield in B decays discussed.

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