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Manuscript Title: SusyBSG: a fortran code for BR[BXsγ] in the MSSM with Minimal Flavor Violation
Authors: G. Degrassi, P. Gambino, P. Slavich
Program title: SusyBSG
Catalogue identifier: AEBM_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 179(2008)759
Programming language: Fortran.
Computer: All computers with a Fortran compiler.
Operating system: Linux.
Keywords: Supersymmetry, B physics, rare decays.
PACS: 12.60.Jv, 13.20He.
Classification: 11.6.

Nature of problem:
Predicting the branching ratio for the decay BXsγ in the MSSM with Minimal Flavor Violation.

Solution method:
We take into account all the available NLO contributions, including the two-loop gluino contributions to the Wilson coefficients computed in ref. [1]. The relation between the Wilson coefficients and the branching ratio for BXsγ is computed along the lines of ref. [2]. The SUSY input parameters can be read from a spectrum file in the SLHA format.

The results apply only to the case of Minimal Flavor Violation.

Unusual features:
Numerical instabilities may arise for special combinations of the input parameters. They can usually be avoided by compiling the code in quadruple precision.

Running time:
Approximately 10 ms in double precision, 0.5 s in quadruple precision (on a Pentium D 3.40-GHz).

[1] G. Degrassi, P. Gambino and P. Slavich, Phys. Lett. B 635 (2006) 335 (arXiv:hep-ph/0601135).
[2] P. Gambino and M. Misiak, Nucl. Phys. B 611 (2001) 338 (hep-ph/0104034)