PROGRAM SUMMARY
Title of program:
SPheno
Catalogue identifier:
ADRV
Ref. in CPC:
153(2003)275
Distribution format: tar gzip file
Operating system: Linux, Unix
Number of lines in distributed program, including test data, etc:
59999
Keywords:
Supersymmetric standard model, Renormalization group equations,
MSSM spectra, Runge-Kutta, Decays of super- symmetric particles,
Production, Elementary particle physics, Phenomenological model.
Programming language used: Fortran
Computer:
PC ,
HP machine ,
ALPHA machine .
Nature of physical problem:
The first issue is the determination of the masses and couplings of
supersymmetric particles in the R-parity conserved MSSM. Low energy
data on Standard Model fermion masses, gauge couplings and electroweak
gauge boson masses serve as constraints. Radiative corrections from
supersymmetric particles to these inputs must be calculated.
Theoretical constraints on the soft SUSY breaking parameters from a high
scale theory are imposed and the parameters at the electroweak scale are
obtained from the high scale parameters by evaluating the corresponding
renormalization group equations. These parameters must be consistent
with the requirements of correct electroweak symmetry breaking. The
second issue is to use the obtained masses and couplings for calculating
decay widths and branching ratios of supersymmetric particles as well as
the cross sections for these particles in electron positron
annihilation. The third issue is to calculate the following low energy
constraints: the branching ratio for b ->sgamma, the SUSY contributions
to the rho parameter as well as the SUSY contributions to the anomalous
magnetic moment of the muon.
Method of solution:
The renormalization connecting a high scale and the electroweak scale is
calculated by the Runge-Kutta method. Iteration provides a solution
consistent with the multi-boundary conditions. In case of three-body
decays and for the calculation of initial state radiation Gaussian
quadrature is used for the numerical solution of the integrals.
Restrictions:
MSSM spectra with real parameters only neglecting the effect of mixing
between (s)fermion generations.
Typical running time:
0.3 s on a Pentium III.