SICBMC cuts used by Geant3 

• from simulation.cdf

  • vertex smearing is ON
    • sigma = 0.007, 0.007, 5.0 cm  ( from beam.cdf )
  • B-Bbar smearing is ON
  • curling tracks suppressing is ON

   

• following physics processes are ON

  • everywhere: decay in flight with generation of secondaries
  • everywhere but in vacuum
    • multiple scattering according to moliere theory
    • muon-nucleus interactions with generation of secondaries
    • photoelectric effect: gamma is stopped, secondaries are produced
    • compton scattering with generation of electrons
    • pair production: gamma is stopped, e+/e- are produced
    • bremstrhalung effect: incident particle is stopped, gamma is generated
    • annihilation effect: electron is stopped, gamma is generated
    • hadronic interactions with generation of secondaries:
      • incident particle is stopped if inelastic interaction
      • incident particle is not stopped if elastic interaction
    • continuous energy loss without generation of delta ray and full Vavilov-Landau-Gauss simulation

     

• particles below threshold are stopped

  • gamma < 1.Mev    (  < 500.Mev in B_muFilterIron = Muon iron shield)
  • electron < 1.Mev   (  < 500.Mev in B_muFilterIron )
  • muon < 10.Mev     (  < 10.Mev in B_muFilterIron )
  • neutral < 10.Mev    (  < 500.Mev in B_muFilterIron )
  • charged hadrons < 10.MeV    (  < 500.Mev in B_muFilterIron )

   

• lower limits for Bremstralhung effect

  • electron > 1.Mev    (  > 500.MeV in B_muFilterIron )
  • muon > 1.Mev        (  > 500.MeV in B_muFilterIron )

   

• muons

  • > 10.Mev can generate e+e- pair
  • < 10.Mev loose energy

   

• following particles are kept in KINE / ATMC banks as Primary particles

  • charged tracks traversing the sensitive part of Velo, IT, OT, Rich, Muon.
  • daughter particles of a primary particle produced before M1 by Bremstrahlung or pair production with energy > 500.Mev