22-29 July 2015
Europe/Vienna timezone

Origin of a large CP asymmetry in B+- --> K+- K+ K- decays

Jul 23, 2015, 12:00 PM
15m
HS21

HS21

talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries

Speaker

Prof. Leonard Lesniak (Henryk Niewodniczanski Institute of Nuclear Physics PAS, Krakow, Poland)

Description

Large CP-violating asymmetry effects in the B+- --> K+- K+ K- decays have been predicted in the QCD factorization model [1]. The model includes strong K+ K- final-state long-distance interactions in the S-, P-, and also (in the recent analysis) D- wave two-body states. The S-wave two-body unitarity conditions involve interchannel couplings of the kaon-kaon states with the intermediate states of two pions and four pions. As a result the pion-pion to kaon-kaon rescattering effects are included in the model. It is shown how the weak phase differences together with the existence of two different strong phases of the S-wave decay amplitudes (related to the phases of the kaon scalar strange and non-strange form factors) contribute to the CP-asymmetry in question. The theoretical results are compared with recent experimental data of the LHCb and BABAR Collaborations [2]. References: [1] A. Furman, R. Kaminski, L. Lesniak, P. Zenczykowski, Phys. Lett. B 699 (2011) 102. [2] L. Lesniak, P. Zenczykowski, Phys. Lett. B 737 (2014) 201.

Primary author

Prof. Leonard Lesniak (Henryk Niewodniczanski Institute of Nuclear Physics PAS, Krakow, Poland)

Co-author

Prof. Piotr Zenczykowski (Henryk Niewodniczanski Institute of Nuclear Physics PAS, Krakow, Poland)

Presentation materials