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Manuscript Title: SOFTSUSY: a program for calculating supersymmetric spectra.
Authors: B.C. Allanach
Program title: SOFTSUSY
Catalogue identifier: ADPM_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 143(2002)305
Programming language: C++, Fortran.
Computer: Pentium PC, SUN, DEC ALPHA.
Operating system: Linux, UNIX.
RAM: 10M words
Keywords: Supersymmetric standard model, Beyond standard model, Renormalisation group equations, MSSM spectra, Runge-Kutta, Iteration, Elementary particle physics, Phenomenological model.
Classification: 11.6.

Nature of 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.

Solution method:
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.

Running time:
5 seconds for one point.