PROGRAM SUMMARY
Title of program:
SOFTSUSY
Catalogue identifier:
ADPM
Ref. in CPC:
143(2002)305
Distribution format: tar gzip file
Operating system: Linux, UNIX
High speed store required:
10MK words
Number of lines in distributed program, including test data, etc:
10484
Keywords:
Supersymmetric standard model, Beyond standard model,
Renormalisation group equations, MSSM spectra, Runge-Kutta,
Iteration, Elementary particle physics, Phenomenological model.
Programming language used: C++, Fortran
Computer:
Pentium PC ,
SUN ,
DEC ALPHA .
Nature of physical problem:
The determination of sparticle masses and couplings of SUSY particles in
the R-parity conserving MSSM is the basic problem. Low energy data on
Standard Model fermion masses, gauge couplings and electroweak boson
masses are to be used as a constraint. SUSY radiative corrections from
sparticle loops to these inputs depend upon the sparticle spectrum, and
must be calculated. Theoretical constraints on the SUSY breaking
parameters from a higher theory are often imposed at a high
renormalisation scale, perhaps resulting from a supergravity or string
theory. Finally, the MSSM parameters must also be consistent with a
minimum in the Higgs potential which leads to the observed electroweak
boson masses.
Method of solution:
The renormalisation connecting a high scale and the electroweak scale is
calculated by the Runge-Kutta method. Iteration then provides a
solution consistent with the multi-boundary conditions.
Restrictions:
MSSM spectra with real parameters only.
Typical running time:
5 seconds for one point.