Changes between Version 3 and Version 4 of FAQ-General-1


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Timestamp:
10/22/13 14:30:25 (6 years ago)
Author:
omatt
Comment:

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  • FAQ-General-1

    v3 v4  
    1212If you just want to hard-code a cut, all you need to do is modify the file SubProcesses/cuts.f, where all external particle 4-momenta are given in the P(0:3,nexternal) array (energy in P(0,I) and 3-momenta in P(1:3,I)). The order of the external particles depends on the subprocess, and can be guessed from the name of the subprocess Pxxxxxxx directory or can be seen from the Pxxxxxxx/leshouche.inc file.
    1313
     14WARNING: By default, various symmetries are taken into account in the process (initial state for example). If your cut didn't agree with those symmetries,
     15you should forbid MG to use those symmentries for the computation of the matrix-element (by doing set group_subprocesses False)
     16
    1417If you want to "standardize" your cuts and be able to change them from the run_card.dat as the default madgraph cuts, you need to modify the files
    1518   * Source/setrun.f