HepSim

Repository with Monte Carlo simulations for particle physics

ttbar_mcfm.py (raw text file)
# HepSim script using DataMelt http://jwork.org/dmelt
# Part of =HepMC= : https://atlaswww.hep.anl.gov/asc/hepsim/
# S.Chekanov (ANL)

from java.lang import *
from java.awt import Color,Font
from jhplot import  HPlot,P1D,HLabel,H1D
from jhplot.io import HBook
from proto import FileNLO   # import FileMC
from jhplot.utils import FileList
from hephysics.particle import LParticle # physics
from hepsim import HepSim
import sys

url="";  TotalEvents=10000000
default_www="http://mc.hep.anl.gov/asc/hepsim/events/pp/100tev/ttbar_mcfm/"
if len(sys.argv)>1:
   if sys.argv[1].startswith("http"):
                            flist=HepSim.getList(sys.argv[1])
                            url=sys.argv[1]
   else: flist=FileList.get(sys.argv[1],"promc")
   if (len(sys.argv)>2): TotalEvents=int(sys.argv[2])
else:
   url=default_www; flist=HepSim.getList(url)
if len(flist)==0: print "Error: No input file!"; sys.exit(0)
else: print "Reading "+str(len(flist))+" files. Nr events= ",TotalEvents

bins=[0,30,60,90,120,150,180,210,240,280,320,360,400,500,600,700,800,1000,1500,2000]
minJetPt=50
nPDF=52     # 52 histograms with different PDF
histo=[]
for i in range(nPDF):
      h1=H1D("pdf="+str(i),bins)
      histo.append(h1)

#histo[0].doc()   # check its methods
nev=0;  Nfiles=len(flist)
for m in range(Nfiles):              # loop over all files in this list    
   file=FileNLO(url+flist[m])        # get input file
#   if (m>5): break                   # uncomment for debug
   header = file.getHeader()
   un=float(header.getMomentumUnit()) # convertion units
   lunit=float(header.getLengthUnit())
   nIterations=header.getWeight()     # MCFM Nr of iterations
   NXF=nIterations*Nfiles
   if m==0:
        print "ProMC v=",file.getVersion(), "M unit=",un,"L unit=",lunit
   if (nev>TotalEvents): print "Max Nr of events are done"; break # stop after some events
   for i in range(file.size()):
      if (nev>TotalEvents): break
      nev=nev+1  
      if (nev%20000==0): 
           if (Nfiles==1): print "Event=",nev
           else: print "Event=",nev," done=",int((100.0*m)/Nfiles),"%"
      eve = file.read(i) 
      pa = eve.getParticles()    # particle information
      ve = eve.getEvent()        # event information
      gweight=ve.getFdata(0)     # global weight. 1-gg, 2-gq, 3-qq, 4-qqb
      weight=gweight/NXF         # take into account iterations & Nr of files
      ttbar=[]
      for j in range(pa.getPxCount()):
           p=LParticle(pa.getPx(j)/un,pa.getPy(j)/un,pa.getPz(j)/un,pa.getEnergy(j)/un)
           mass=p.calcMass()
           if (mass>170 and mass0): up=up+d*d
        if (d0: name=sys.argv[0].replace(".py","")
file=HBook(name+".jdat","w"); print name+".jdat created"
file.write(xsec)
file.write(errors)
file.close()
c1.export(name+".svg");    print name+".svg created"
# xsec.toFile(name+".txt");  print name+".txt created"
# sys.exit(0)

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