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: http://theory.sinp.msu.ru/pipermail/comphep-common/2008/000131.html
Дата изменения: Thu Apr 18 22:50:41 2013 Дата индексирования: Fri Feb 28 06:33:23 2014 Кодировка: |
Dear Yong, x1 and x2 can be easily calculated from current data in event files. P_Z components of the initial particles are the 1st and 2nd column in the file. pdf values are available in sqme.c The file is generated automatically by s_comphep.exe and located in results: Here is the peace of code: if(!strfun_calc) { strfun_calc=1; q=qcd_Scale_chep(); if(ans0) xstr0=strfun_(0,xbjo[0],xbjo[1],q); if(ans1) xstr1=strfun_(1,xbjo[0],xbjo[1],q); } In fact strfun_ returns pdf1*pdf2, since CompHEP has got an implemented approach with non-factorized PDF (we call it hash-model). If you use the standard pdf: strfun_(1,xbjo[0],xbjo[1],q) = 0 strfun_(0,xbjo[0],xbjo[1],q) = pdf (xbjo[0], q) * pdf (xbjo[1], q) If you need you can add the number to the old format file in src/num/evnt_format1.c, the routine write_event_frmt1(...) It is quite easy to get how to modify it. With best regards, -- Dr. Alexander Sherstnev, Cavenidish Laboratory, University of Cambridge, and SINP, Moscow State University http://www.hep.phy.cam.ac.uk/people/sherstnev.html