Bounds on new physics from B_s mixing
High Energy Physics - Phenomenology
2010-11-03 v1
Abstract
I summarize the observables constraining the B_s-B_s-bar mixing complex and present a new calculation of the element Gamma_{12}^s of the decay matrix. Gamma_{12}^s enters the prediction of the width difference Delta Gamma_s, for which we obtain Delta Gamma_s^SM = 0.088 +/- 0.017 ps^(-1), if no new physics enters B_s-B_s-bar mixing. Applying our formulae to Tevatron data we find a deviation of the B_s-B_s-bar mixing phase phi_s from its Standard Model value by 2 standard deviations. I stress that present data do not give any information on the sign of Delta Gamma_s.
Keywords
Cite
@article{arxiv.0707.3538,
title = {Bounds on new physics from B_s mixing},
author = {Ulrich Nierste},
journal= {arXiv preprint arXiv:0707.3538},
year = {2010}
}
Comments
Talk at "CTP Symposium On Supersymmetry At LHC: Theoretical And Experimental Prospectives", 11-14 Mar 2007, Cairo, Egypt