Recent results on CP violation in charm and τ decays from BABAR

3rd Symposium on Prospects in the Physics of Discrete Symmetries

Neri, Nicola^1

INFN-Sezione di Milano, Milano, Italy^1

关键词: CP violations;    Data sample;    Final state;    Integrated luminosity;    Lifetime ratio;    Meson decays;    New physics;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/447/1/012027/pdf
DOI  :  10.1088/1742-6596/447/1/012027

来源: IOP

【 摘 要 】

In the Standard Model CP violation in charm decays is expected to be very small, at the level of 0.1% or below, while CP violation in τ decays is predicted to be negligible. A significant excess of CP violation with respect to the Standard Model predictions would be a signature of new physics. We report on recent searches for CP violation in charm meson decays and in τ lepton decays at BABAR, using a data sample corresponding to an integrated luminosity of about 470 fb-1. In particular, we report on searches for CPV in the decay modes with a K0S in the final state, such as D+→ K0SK+, D+s → K0SK+, D+s → K)Sπ+and τ+→ π+K0Sτ, and in the 3-body D+→ K+K-π+decay. A lifetime ratio analysis of D0→ K+K-, π+π-with respect to D0→ K-π+decays, which is sensitive to D0-0mixing and CP violation, is also presented here.