Light Rays of New Physics: CP Violation in B -> Xs gamma Decays
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/9809343,
title = {Light Rays of New Physics: CP Violation in B -> Xs gamma Decays},
author = {Matthias Neubert},
journal= {arXiv preprint arXiv:hep-ph/9809343},
year = {2009}
}
Comments
6 pages, 2 figures, uses ltwol2e.sty (included); to appear in the Proceedings of the QCD 98 Euroconference (Montpellier) and of the 29th International Conference on High Energy Physics (Vancouver)