22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Implications of the dimuon CP asymmetry in B_{d,s} decays

24 Jul 2010, 14:10
Salle 242A ()

Salle 242A

Parallel Session Talk 06 - CP violation, CKM and Rare Decays 06 - CP violation, CKM and Rare Decays


Gilad Perez (Weizmann Institute)


The D0 Collaboration reported a 3.2sigma deviation from the standard model prediction in the like-sign dimuon asymmetry. Assuming that new physics contributes only to B_{d,s} mixing, we show that the data can be analyzed without using the theoretical calculation of \Delta\Gamma_s, allowing for robust interpretations. We find that this framework gives a good fit to all measurements, including the recent CDF S_{\psi\phi} result. The data allow universal new physics with similar contributions relative to the SM in the B_d and B_s systems, but favors a larger deviation in B_s than in B_d mixing. The general minimal flavor violation framework with flavor diagonal CP violating phases can account for the former and remarkably even for the latter case. This observation makes it simpler to speculate about which extensions with general flavor structure may also fit the data.

Primary author

Gilad Perez (Weizmann Institute)

Presentation Materials