SUSY contributions to CP violations in $b\to s$ and $b\to d$ transitions facing on new data

TL;DR

This paper investigates how supersymmetric particles, specifically gluino-squark interactions, contribute to CP violation in certain B meson decays, constrained by recent experimental data, and predicts observable effects for upcoming experiments.

Contribution

It provides new constraints on squark flavor mixing parameters from recent data and predicts significant CP asymmetries in B decays within SUSY frameworks.

Findings

CP asymmetry in B_s→φφ could be large and testable at LHCb.

Constraints on squark mixing parameters from b→sγ and b→dγ decays.

Predicted CP asymmetries in various B decay modes based on SUSY models.

Abstract

We study the contribution of the gluino-squark mediated flavor changing process for the CP violation in $b\to s$ and $b\to d$ transitions facing on recent experimental data. The mass insertion parameters of squarks are constrained by the branching ratios of $b\to s\gamma $ and $b\to d\gamma $ decays. In addition, the time dependent CP asymmetries of $B^0\to \phi K_S$ and $B^0\to \eta ' K^0$ decays severely restrict the allowed region of the mass insertion parameter for the $b\to s$ transition. By using these constraints with squark and gluino masses of 1.5 TeV, we predict the CP asymmetries of $B_s\to \phi \phi $, $B_s\to \eta '\phi $, and $B^0\to K^0\bar K^0$ decays, as well as the CP asymmetries in $b\to s\gamma $ and $b\to d\gamma $ decays. The CP violation in the $B_s\to \phi \phi$ decay is expected to be large owing to the squark flavor mixing, which will be tested at LHCb soon.