Supersymmetry

MSEL = 39-45
ISUB = 201-296 (see tables at the beginning of this chapter)

PYTHIA includes the possibility of simulating a large variety of production and decay processes in the Minimal Supersymmetric extension of the Standard Model (MSSM). The simulation is based on an effective Lagrangian of softly-broken SUSY with parameters defined at the weak scale, typically between $m_{\mathrm{Z}}$ and 1 TeV. The relevant parameters should either be supplied directly by the user or they should be read in from a SUSY Les Houches Accord spectrum file (see below). Some other possibilities for obtaining the SUSY parameters also exist in the code, as described below, but these are only intended for backwards compatibility and debugging purposes.