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Support for multiple generation algorithm to simulate Beam-Gas + Beam-Beam collisions

Giacomo Graziani requested to merge Smog2_MultipleGeneration_final into master

  • setup of (multiple) collision systems through the Gauss Production option, e.g.
    Gauss().Production="BEAMGAS+BEAMBEAM"
    via multiple instantiations of the Generation algorithm

  • CRMC/EPOS configuration from the Gauss Configurable through option
    Gauss().BeamBeam= ['CRMCEpos' ]
    and/or
    Gauss().BeamGas= ['CRMCEpos' ]
    (as was done for MadGraph)

  • new Gauss options to declare fixed target configuration:
    FixedTargetParticle
    FixedTargetLuminosity
    FixedTargetXSection

  • cleanup of CRMCProduction: kinematics set via BeamTool, output particles in Lab frame (BoostForEpos algorithm dropped)

  • Pileup tool for Beam-gas collisions (BeamGasFixedLuminosity)

  • Smear vertex smearing tool for gas in SMOG2 (TriangZSmearVertex)

A change to DecFiles is also required (corresponding merge request with same name)

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