SusyBSG: a Fortran code for BR[B→Xsγ]BR[B→Xsγ] in the MSSM with Minimal Flavor Violation

We present the Fortran code SusyBSG version 1.1, which computes the branching ratio for the decay B→XsγB→Xsγ in the MSSM with Minimal Flavor Violation. The computation takes into account all the available NLO contributions, including the complete supersymmetric QCD corrections to the Wilson coefficients of the magnetic and chromomagnetic operators.Program summaryProgram title: SusyBSGCatalogue identifier: AEBM_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEBM_v1_0.htmlProgram obtainable from: CPC Program Library, Queen's University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 99 155No. of bytes in distributed program, including test data, etc.: 708 850Distribution format: tar.gzProgramming language: FortranComputer: All computers with a Fortran compilerOperating system: LinuxClassification: 11.6Nature of problem:   Predicting the branching ratio for the decay B→XSγB→XSγ 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 B→XSγB→XSγ is computed along the lines of Ref. [2]. The SUSY input parameters can be read from a spectrum file in the SLHA format.Restrictions: 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).References:[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.