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 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))

Presentation Materials