# EPS HEP 2013 Stockholm

17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

## Search for the rare decay B_s -> mu mu at DØ

19 Jul 2013, 15:30
15m
D1 (KTH Campus)

### D1

#### KTH Campus

Talk presentation Flavour Physics and Fundamental Symmetries

Mark Williams

### Description

The decay B_s -> mu mu is heavily suppressed in the standard model, but many scenarios for physics beyond the standard model predict large enhancements in this process. We report an updated search for this decay using data collected by the D0 detector at the Fermilab Tevatron collider. We use the full Run II data set, corresponding to approximately 10.4 fb-1 of integrated luminosity in p \bar{p} collisions at sqrt{s}=1.96 TeV. We determine that the branching ratio Br(Bs-> mu mu) is less than 15 x 10^-9 at the 95% CL.

### Primary author

The DØ Collaboration (Fermi National Laboratory)

 Slides