22-27 March 2015
Hotel do Bosque
Brazil/East timezone

## Direct CP Violation in charmless three-body decays of B mesons

24 Mar 2015, 17:30
30m
Hotel do Bosque

#### Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Oral presentation Strong and electroweak interactions in the standard model

### Speaker

Prof. Alberto Correa Dos Reis (CBPF - Brazilian Center for Physics Research (BR))

### Description

Charmless three-body decays of $B^+$ mesons are an excellent laboratory for direct CP violation (CPV) studies. While in two-body decays one measures a single number - the CP asymmetry in the partial decay rates -, in three-body decays the distribution of CP asymmetries across the two-dimensional phase space brings additional information on the underlying mechanisms. Recently the LHCb collaboration performed a study of CP asymmetries in the Dalitz plot of the decays $B^+ \to \pi^+\pi^-\pi^+$, $B^+ \to K^+\pi^-\pi^+$, $B^+ \to K^+\pi^-K^+$, and $B^+ \to K^+K^-K^+$. CP asymmetries as large as 80% were found in regions of the Dalitz plots. The distribution of the CP asymmetry across the phase space exhibit a complex pattern, which may be a consequence of the interplay between the weak and strong phases. In this talk these results will be presented and a possible interpretation will be discussed.

### Primary author

Prof. Alberto Correa Dos Reis (CBPF - Brazilian Center for Physics Research (BR))

 Slides