| | 1 | |
| | 2 | |
| | 3 | === How do I implement my own cuts in !MadEvent ? === |
| | 4 | |
| | 5 | From the web, cuts can be only set among those provided in the run_card.dat. |
| | 6 | |
| | 7 | To add new cuts, one needs |
| | 8 | |
| | 9 | 1. to know a bit of fortran |
| | 10 | 1. to download the code (either after process generation or from our Download page) and run on your local machine. |
| | 11 | |
| | 12 | If 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. |
| | 13 | |
| | 14 | If 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 |
| | 15 | * Source/setrun.f (which reads the run_card.dat) |
| | 16 | * SubProcesses/cuts.inc |
| | 17 | * SubProcesses/cuts.f |
| | 18 | |
| | 19 | which appear in Template or in the process dependent code that you downloaded from the web (madevent.tar.gz). You can use e.g. the cut xptj as a template for your new cut. |
| | 20 | |
| | 21 | -- Main.JohanAlwall - 2011-10-19 |
