# DPF 2011

8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

## Long-Distance Dominance of the CP Asymmetry in B->X_{s,d}+gamma Decays

10 Aug 2011, 18:06
24m
551 B (Rhode Island Convention Center)

### 551 B

#### Rhode Island Convention Center

Parallel contribution CP-Violation

### Speaker

Dr gil paz (The University of Chicago)

### Description

The CP asymmetry in inclusive b-> s gamma decays is an important probe of new physics. The theoretical prediction was thought to be of a perturbative origin. In the standard model the perturbative prediction for the asymmetry is about 0.5 percent. In a recent work with M. Benzke, S.J. Lee and M. Neubert , we have shown that the asymmetry is in fact dominated by non-perturbative effects. Since these are hard to estimate, it reduces the sensitivity to new physics effects. On the other hand, these new non-perturbative effects suggest a new test of new physics by looking at the difference of the CP asymmetries in charged versus neutral B-meson decays.

### Primary author

Dr gil paz (The University of Chicago)

 Slides