# Full 1-loop calculation of BR( B s , d 0 → ℓ ℓ ̄ ) in models beyond the MSSM with SARAH and SPheno

## Description

Abstract We present the possibility of calculating the quark flavor changing neutral current decays B s 0 → ℓ ℓ ̄ and B d 0 → ℓ ℓ ̄ for a large variety of supersymmetric models. For this purpose, the complete one-loop calculation has been implemented in a generic form in the Mathematica package SARAH. This information is used by SARAH to generate Fortran source code for SPheno for a numerical evaluation of these processes in a given model. We comment also on the possibility to use this setup for non-s... Title of program: SARAH Catalogue Id: AEIB_v2_1 Nature of problem Models beyond the SM can have new contributions to the decays of neutral B-mesons. For a precise prediction of the corresponding branching ratios a full 1-loop calculation including all possible wave, penguin and box diagrams is necessary. This usually requires a big effort and public codes for these calculations so far only support a few selected models. Versions of this program held in the CPC repository in Mendeley Data AEIB_v1_0; SARAH; 10.1016/j.cpc.2010.11.030 AEIB_v2_0; SARAH; 10.1016/j.cpc.2013.02.019 AEIB_v2_1; SARAH; 10.1016/j.cpc.2013.06.021 AEIB_v3_0; SARAH; 10.1016/j.cpc.2014.02.018 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)