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Currently, each step is performed in a separate batch job. The following event samples are made:

• "beam-tri":  simply   simulates the beam going though the target; the “tri” refers to trident events that are inserted at the expected rate.  This is intended to be an unbiased representation of our data
• “tritrig-beam-tri”:  the “tritrig” refers to a sample of tridents that are preselected (at the MadGraph level) to be more likely to be in the detector acceptance and pass the trigger cuts so that we can efficiently get a large sample. These then have “beam-tri” overlaid in order to simulate what trident events look like in the detector. 
  
• "wab-beam-tri": beam-tri with wide-angle bremsstrahlung events mixed in.
  
• “ap” and “ap-beam-tri”:  the “ap” stands for “A prime” and is our signal MC…they can be generated at a given mass and ctau, and are produced with and w/o beam overlay (mostly with).  
• "moller" pure moller events. Note: beam backgrounds already contain moller events. "moller" is intended to be used for specialized studies involving them.
  

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• ebeam.csh:  given the beam energy string (e.g. “1pt05”) returns the beam energy in MeV
• dz.csh:  given the beam energy string, returns the target thickness
• ne.csh:  given the beam energy string, returns the number of electrons per 2ns bunch
• apmass.csh: given the beam energy string, returns as list of A’ masses to simulate

Event Generation: 

As mentioned, the The event generation is performed via MadGraph, EGS5, or GEANT4 depending on the type.  Below lists the different type of particles produced, and some instructions on each.

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• beam electrons:  
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/stdhep/beam.xml
•  run with ./runjob.sh stdhep/beam.xml 1pt05 <firstjob> <lastjob>
• the executable that does the event generation is /u/group/hps/production/mc/egs5/beam_v3.exe
• output is an .stdhep file with each event being the products from 1 scattered electron (I think…1 event _may_ be 1 bunch) 
• beam hadrons:  
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/stdhep/hadrons.xml
•  run with ./runjob.sh stdhep/hadrons.xml 1pt05 <firstjob> <lastjob>
• the executable that does the event generation is a GEANT4 release that gets copied locallyorg
• output is an .stdhep file with each event being hadrons from bunch
• unbiased tridents == “tri”:  
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/lhe/tri.xml
•  run with ./runjob.sh lhe/tri.xml 1pt05 <firstjob> <lastjob>
•  this runs MadGraph using the  /u/group/hps/production/mc/MadGraph/trigg/run_card_<ebeam>.dat
• output is an lhe file with each event being 1 trident
• these files are small, so they are bundled 100-to-1 with:
• ./runjob_100to1.sh lhe/tri_merge_100to1.xml 1pt1 1 100
• enhanced tridents == “tritrig”
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/lhe/tritrig.xml
•  run with ./runjob.sh lhe/tritrig.xml 1pt05 <firstjob> <lastjob>
•  this runs MadGraph using the  /u/group/hps/production/mc/MadGraph/tritrig/run_card_<ebeam>.dat
• the cuts here are E(e+e-)>0.8 EBeam and m(e+e-)>10MeV
• output is an lhe file with each event being 1 trident

• wide-angle bremsstrahlung == “wab”:  
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/lhe/wab.xml
•  run with ./runjob.sh lhe/wab.xml 1pt05 <firstjob> <lastjob>
•  this runs MadGraph using the  /u/group/hps/production/mc/MadGraph/wab/run_card_<ebeam>.dat
• output is an lhe file with each event being 1 wab event (cross section ~0.7 barns)
  
• like the tridents, these files are also bundled 100-to-1 with:
• ./runjob_100to1.sh lhe/wab_merge_100to1.xml 1pt1 1 100

• signal events ==  “ap-truth”
•  auger xml:  /u/group/hps/production/mc/EngRun2015Scripts/lhe/ap-truth.xml
•  run with ./runjob.sh lhe/ap-truth.xml 1pt05 <firstjob> <lastjob>
•  this runs MadGraph using the  /u/group/hps/production/mc/ap/run_card_<ebeam>.dat
• also converts the lhe to stdhep while adding displaced vertex (though now ct is hardcoded to 0 in the .xml)
• output is an stdhep file with each event being 1 trident

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