Bs decays: CP asymmetries in left-right models with spontaneous CP violation

TL;DR

This paper investigates how left-right models with spontaneous CP violation introduce new CP phases that significantly alter CP asymmetries in B_s meson decays, potentially deviating from Standard Model predictions.

Contribution

It analyzes the impact of new CP phases in left-right models on B_s decay asymmetries, highlighting possible large deviations from Standard Model expectations.

Findings

Large deviations in CP asymmetries can be explained by the model.

New physics effects influence mixing, width difference, and decay processes.

Measurement of the angle γ can be significantly affected.

Abstract

We present the contributions of new CP phases in CP asymmetries of two-body neutral $B_s$ decays coming from a left--right model with spontaneous CP violation. Large deviations from the Standard Model predictions can be accommodated in a natural way by this type of models. The new physics effects on the mixing, width difference and decays are analysed. In particular, we show how the measurement of the angle $\gamma$ in electroweak penguin-dominated processes can be largely affected.