SUSY_FLAVOR: A computational tool for FCNC and CP-violating processes in the MSSM

Abstract

We present SUSY_FLAVOR – a Fortran 77 program that calculates important leptonic and semi-leptonic low-energy observables in the general R-parity conserving MSSM. For a set of input MSSM parameters, the code gives predictions for the K ¯ 0 K 0 , D ¯ D , B ¯ d B d and B ¯ s B s mixing parameters; B → X s γ , B s , d → l + l − , K L 0 → π 0 ν ¯ ν and K + → π + ν ¯ ν decay branching ratios; and the electric dipole moments of the leptons and the neutron. All these quantities are calculated at one-loop level (with some higher-order QCD corrections included) in the exact sfermion mass eigenbasis, without resorting to mass insertion approximations. The program can be obtained from http://www.fuw.edu.pl/susy_flavor. Program summary Program title: SUSY_FLAVOR Catalogue identifier: AEGV_v1_0 Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEGV_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 14 603 No. of bytes in distributed program, including test data, etc.: 82 126 Distribution format: tar.gz Programming language: Fortran 77 Computer: PCs and workstations Operating system: Any, tested on Linux Classification: 11.6 Nature of problem: Predicting CP-violating observables, meson mixing parameters and branching ratios for a set of rare processes in the general R-parity conserving MSSM. Solution method: We use standard quantum theoretical methods to calculate Wilson coefficients in MSSM and at one loop including QCD corrections at higher orders when this is necessary and possible. The input parameters can be read from an external file in SLHA format. Restrictions: The results apply only to the case of MSSM with R-parity conservation. Running time: For single parameter set approximately 1 s in double precision on a PowerBook Mac G4.