The ``Snowmass Points and Slopes'' (SPS) are a set of
benchmark points and parameter lines in the MSSM parameter space corresponding
to different scenarios in the search for Supersymmetry at present and future
colliders. They have been agreed upon as a consensus for a common set of
benchmark scenarios based on
different existing proposals for post-LEP benchmarks.
Benchmark values for further points on the 7 model lines (slopes)
The choice of the SPS has been motivated by the mSUGRA, GMSB, and AMSB
SUSY breaking scenarios.
In order to connect the above benchmark values (the low-energy MSSM parameters) with the (high-energy) parameters of the mSUGRA, GMSB and AMSB scenarios, a certain standard had to be defined.
Choosing ISAJET 7.58 as standard, the SPS correspond to the mSUGRA, GMSB and AMSB parameters given here
If other programs than version 7.58 of ISAJET
are used to relate the benchmark values to mSUGRA,
GMSB and AMSB parameters, the latter parameters should be adjusted accordingly in order to obtain
the correct benchmark values for the low-energy MSSM parameters (within reasonably good approximation).
For calculating the SUSY spectra, branching ratios, etc. from the benchmark
values of the low-energy
MSSM parameters, the user should choose the most appropriate program for his/her application. In order
to allow detailed comparisons of different studies based on the same SPS benchmark values, the relevant
masses and branching ratios used in the analyses should be specified.
The SUSY particle spectra for the 10 SPS benchmark points can be found
See N. Ghodbane and H.U. Martyn, hep-ph/0201233 for a detailed listing of the mass spectra and
branching ratios for the SPS parameter points obtained with ISAJET 7.58.
furthermore for SPS 6, 7, 8, 9 the calculation of the spectra and branching
with ISAJET 7.58 has been compared with the results of SUSYGEN 3 and PYTHIA 6.08 (for the same
low-energy MSSM input parameters). For SPS 1a, 2, 3, 4, 5 a comparison between ISAJET 7.58, SUSYGEN 3 and PYTHIA 6.08 has been performed concerning the precision for relating mSUGRA
parameters to low-energy spectra.
In B.C. Allanach, hep-ph/0110227 the outputs of different codes are compared for some ofn the SPS model lines.
The 10 SPS points will appear as a default input option in the next release of the program FeynHiggs
Input files for different SPS points (MSSM parameters) for use within BMPZ, HERWIG, ISAJET, PYTHIA, SOFTSUSY, SUITY, SUSPECT, SUSYGEN, etc.
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Last update: 12.06.02, Georg.Weiglein@durham.ac.uk