Supersymmetry and CP violation in B^0_s - \bar{B}^0_s mixing and B^0_s -> J/\psi \phi decay

TL;DR

This paper investigates how supersymmetric models influence CP violation in B_s meson mixing and decay, showing experimental constraints limit SUSY effects but still allow for potentially large CP asymmetries in decay processes.

Contribution

The study provides a detailed analysis of supersymmetric contributions to B_s mixing and decay, highlighting the impact of recent experimental limits on CP violation predictions.

Findings

SUSY contributions are constrained by ΔM_{B_s} and mercury EDM measurements.

Large indirect CP asymmetries are possible in B_s → J/ψ φ decay due to SUSY effects.

SUSY effects in B_s decay can be consistent with CP measurements in the B_d system.

Abstract

Supersymmetric contributions to time independent asymmetry in $B^0_s \to J/\psi \phi$ process are analyzed in the view of the recent Tevatron experimental measurements. We show that the experimental limits of the mass difference $\Delta M_{B_s}$ and the mercury EDM significantly constrain the SUSY contribution to $B^0_s -\bar{B}^0_s$ mixing, so that $\sin 2 \beta_s \lsim 0.1$. We also point out that the one loop SUSY contribution to $B^0_s \to J/\psi \phi$ decay can be important and can lead to large indirect CP asymmetries which are different for different polarization states. These new physics effects in the decay amplitude can be consistent with CP measurements in the $B_d$ system.