Bounds on new physics from B_s mixing

Details Bounds on new physics from B_s mixing Bounds on new physics from B_s mixing

2007-07-24

arxiv.org/abs/0707.3538v1

Int.J.Mod.Phys.A22:5986-5996,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk at "CTP Symposium On Supersymmetry At LHC: Theoretical And Experimental Prospectives", 11-14 Mar 2007, Cairo, Egypt

Scientific paper

10.1142/S0217751X07039171

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.

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