How to make a generator HEPG file (*.gen)
from a MadGraph file (*.dat) with helicity information
To make a generator file *.gen from a MadGraph file (*.dat) that
contains helicity information, follow these steps (assuming that the
user's home directory is /cdf/home/user):
/cdf/home/user> mkdir runDir
/cdf/home/user> cd runDir
/cdf/home/user/runDir> source ~cdfsoft/cdf2.cshrc
/cdf/home/user/runDir> setup cdfsoft2 4.9.1hpt3
/cdf/home/user/runDir> ln -s ~levys/rel-dirs/pev_to_hepg_4.9.1hpt3/bin/Linux2-KCC_4_0/LesHouchesModule_test .
/cdf/home/user/runDir> ln -s ~levys/rel-dirs/pev_to_hepg_4.9.1hpt3/run_LesHouches.tcl .
/cdf/home/user/runDir> cp -v ~levys/rel-dirs/pev_to_hepg_4.9.1hpt3/make_hepg_wspin.sh .
/cdf/home/user/runDir> cp -v ~levys/rel-dirs/pev_to_hepg_4.9.1hpt3/splitter.sh .
/cdf/home/user/runDir> ./make_hepg_wspin.sh [filename] [Nevents]
[filename] = name of MadGraph (*.dat) generator file with spin information
Note that if the make_hepg_wspin.sh script is run without arguments, it
[Nevents] = number of events to run
will print out help information. The script make_hepg_wspin.sh contains
additional usage information at the beginning that should be read.
The user must change the variable OUTDIR at the top of the script so
that it is set to the relevant output directory. Also, the script
expects that the name of the input file will be of the form *.dat,
where * is a wildcard that can be any characters or numbers.
Since simulation / reconstruction at CDF can only currently be run on
HEPG files that contain a maximum of 2500 events the last line of the
make_hepg_wspin.sh runs the script splitter.sh that divides the total
number of events into chunks of 2500. If the user sets OUTDIR to
/home/cdf/user/output, specifies the input file as MG_ttbar.dat, and
specifies 8403 events to be run, the output files will be:
where the first three files contain a total of 7500 events and the
last file contains 903 events.
If the user wishes to run without splitting the output files into
chunks of 2500 events each, then the nearly last line of
make_hepg_wspin.sh should be changed from
$BINARY $TCLFILE >& $LOGFILE
Please send questions or comments to Stephen Levy
Last update : September 08, 2003