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simc_gfortran - Hall C/A Physics Monte Carlo

SIMC (simc_gfortran) is the standard Hall C Monte Carlo for coincidence reactions, written in FORTRAN.

Features

  • SIMC simulates the optics (using COSY models) and apertures of the Hall C spectrometers (HMS, SOS, SHMS) and other spectrometers at Jefferson Lab (HRS's, BigCal, ...)
  • Radiative effects, multiple scattering, ionization energy loss and particle decay are included
  • Simple presecriptions are available for Final State Interactions, Coulomb Corrections and other effects.

Reactions

SIMC has physics models for the following reactions.

  • Elastic and quasi-elastic scatering: H(e,e'p), A(e,e'p)
  • Exclusive pion production: H(e,e'pi+)n, A(e,e'pi+/-) (quasifree or coherent)
  • Kaon electroproduction: H(e,e'K+)Lambda,Sigma, A(e,e'K+/-),A(e,e'K-)
  • Semi-inclusive pion production: H(e,e'pi+/-)X, D(e,e'pi+/-)X
  • Semi-inclusive kaon production: H(e,e'K+/-)X, D(e,e'K+/-)X
  • Diffractive rho production: H(e,e'rho->pi+ pi-)p, D(e,e'rho->pi+ pi-)

SIMC is NOT

  • Not a full detector response simulation a la GEANT/GEANT4
  • Does NOT simulate a large class of processes simultaneously to gerate backgrounds (like Pythia for example)
  • Not a generic event generator. Processes are generated over a limited phase space matching the spectrometer acceptances
  • Not hard to modify

Overview

An overview of SIMC can be found in this presentation at the 2009 Hall A Collaboration Meeting

Documentation

For more information, see the SIMC Monte Carlo page in the Hall C Wiki