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T: Fachverband Teilchenphysik
T 74: Flavor physics: CKM II
T 74.10: Vortrag
Donnerstag, 2. April 2020, 18:45–19:00, H-HS XI
CP-Violation in Multi-Body B Decays — •Kevin Olschewsky1, Thomas Mannel1, and Keri Vos2 — 1Universität Siegen, Siegen, Germany — 2TU München, Garching, Germany
Charmless two and three-body B decays are interesting probes of CP violation. In the Standard Model (SM), CP violation is induced by a weak phase described by the CKM matrix. For charged B decays, only direct CP violation occurs, which requires both a weak CP-violating and a strong CP-conserving phase. While the first is given by the CKM-phase in SM, it is extremely challenging to calculate the strong phase in a QCD based framework due to hadronic and rescattering effects.
The current analysis of multi-body B decays is usually done with a resonant 2+1 description, which does not include DD threshold effects. These effects can provide an important mechanism in order to generate a non-trivial strong phase that may explain the large CP asymmetries observed at high invariant masses. We propose an addition to current resonance models including such threshold effects.