SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM

TL;DR

SuperIso is a computational tool designed to calculate the isospin asymmetry in B -> K* gamma decay within the MSSM, incorporating NLO supersymmetric effects and QCD factorization, aiding in constraining supersymmetric models.

Contribution

This paper introduces SuperIso, a novel program that computes isospin asymmetry and branching ratios in B decays within the MSSM, including NLO supersymmetric contributions.

Findings

Isospin symmetry breaking is highly restrictive in the mSUGRA parameter space.

The program accurately calculates the inclusive b -> s gamma branching ratio.

SuperIso provides a valuable tool for testing supersymmetric models against B decay observables.

Abstract

We present a program for calculating the isospin symmetry breaking of the B -> K* gamma decay in the MSSM with minimal flavor violation. This program calculates the NLO supersymmetric contributions to the isospin asymmetry, using the effective Hamiltonian approach and within the QCD factorization method. We show that isospin symmetry breaking proves to be a very restrictive observable, in particular in the mSUGRA parameter space. The program also calculates the inclusive branching ratio associated to b -> s gamma transition, as a comparison reference.