Supersymmetric contribution to B to rho K and B to pi K^* decays in SCET

TL;DR

This paper investigates how supersymmetric models, particularly gluino-mediated flavor violations, can explain the observed direct CP asymmetries in certain B meson decays, which are not accounted for by the Standard Model alone.

Contribution

It extends the analysis of B decay CP asymmetries within SCET to include SUSY contributions via the Mass Insertion Approach, showing SUSY can explain experimental data.

Findings

Standard Model cannot fully explain CP asymmetries in B decays.

SUSY contributions via gluino exchange can significantly enhance CP asymmetries.

SUSY can reconcile theoretical predictions with experimental results.

Abstract

We analyze the supersymmetric contributions to the direct CP asymmetries of the decays $B \to \pi K^*$ and $B\to\rho K$ within Soft Collinear Effective Theory. We extend the Standard Model analysis of these asymmetries to include the next leading order QCD corrections. We find that, even with QCD correction, the Standard Model predictions can not accommodate the direct CP asymmetries in these decay modes. Using Mass Insertion Approach, we show that non-minimal flavor SUSY contributions mediated by gluino exchange can enhance the CP asymmetries significantly and thus can accommodate the experimental results.