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+====== TTP06-33 B_d and B_s mixing: mass and width differences and CP violation ======
+   <hidden TTP06-33  B_d and B_s mixing: mass and width differences and CP violation > B-B-bar mixing involves three physical parameters: the magnitudes of the
+ off-diagonal elements of the mass and decay matrices and their relative
+ phase.  They are related to the mass and width differences between the
+ mass eigenstates and to the CP asymmetry in flavour-specific decays,
+ a_fs. Introducing a new operator basis I present new, more precise
+ theory predictions for the width differences in the B_s and B_d systems:
+ in the Standard Model one finds Delta Gamma_s = 0.088 +/- 0.017 ps^{-1}
+ and Delta Gamma_d = (26.7 +5.8/-6.5) * 10^{-4} ps^{-1}.  Updates
+ of the mass differences Delta M_d and Delta M_s and of a_{fs}^d and
+ a_{fs}^s are also presented.  Then I discuss how various present and
+ future measurements can be combined to constrain new physics. The
+ extraction of a new CP phase phi_s^Delta from data on a_{fs}^s also
+ profits from our new operator basis.  Confronting our new formulae with
+ D0 data we find that sin phi_s^Delta deviates from zero by 2 sigma.
+ </hidden>
+|**Ulrich Nierste**  |
+|**  Nucl.Phys.Proc.Suppl.  170 135-140 2007  **  |
+| {{preprints:2006:ttp06-33.pdf|PDF}} {{preprints:2006:ttp06-33.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/0612310|arXiv]]   |
+| |