====== TTP07-18 Bounds on new physics from B_s mixing ======
 
 
   <hidden TTP07-18  Bounds on new physics from B_s mixing > 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.
 </hidden>
|**Ulrich Nierste**  | 
|**      Contibution to the CTP Symposium on Supersymmetry at LHC: Theoretical and Experimental Prospectives, Cairo, Egypt, 11-14 Mar 2007 **  |
| {{preprints:2007:ttp07-18.pdf|PDF}} {{preprints:2007:ttp07-18.ps|PostScript}} [[http://arxiv.org/abs/0707.3538|arXiv]]   |
| |