SDECAY

released by M.Mühlleitner, A.Djouadi, Y.Mambrini


A Fortran code for the calculation of the decay widths and the branching ratios of the supersymmetric particles in the Minimal Supersymmetric Standard Model.


The Fortran code SDECAY, deals with the decays of supersymmetric (SUSY) particles in the framework of the Minimal Supersymmetric Standard Model (MSSM), and includes the most important higher order effects.

It uses any input file given in the SUSY Les Houches Accord (SLHA) format or the RGE program SuSpect in order to obtain the mass spectrum and the soft SUSY-breaking parameters. It then evaluates the various couplings of the SUSY particles and MSSM Higgs bosons.

It calculates the decay widths and the branching ratios of all the two-body decay modes, including the QCD corrections to the processes involving squarks and gluinos and the dominant electroweak effects to all processes. It also calculates the loop induced two-body decay channels, as well as all the possibly important higher order decay modes: the three-body decays of charginos, neutralinos, gluinos, top and bottom squarks and the four-body decays of the top squark.

The program also calculates the decay widths and branching ratios of the heavy top quark and will include the one-loop SUSY-QCD radiative corrections.


Besides the SuSpect files (suspect2.in, suspect2.f, twoloophiggs.f) needed for the evaluation of the spectrum if it is taken from SuSpect, the code contains only one source file, the main body of the program sdecay.f, written in Fortran77, and one input file, sdecay.in, from which any choice of approximation in the calculation is driven [include or not the higher order corrections and/or decays, the choice of the various scales, the order of perturbation at which some couplings are calculated, etc].

All results for the total decay widths and branching ratios are given in the output file sdecay.out, either in a simple and transparent form or in the SUSY Les Houches Accord format. [This choice can also be made in the input file.]

The program can use any other RGE spectrum output given in the SLHA format.


Last modified: Tue Sep 7 16:50:21 CEST 2004