File indexing completed on 2024-04-06 12:23:28
0001 import copy
0002 from ROOT import heppy
0003 from PhysicsTools.Heppy.utils.cmsswRelease import isNewerThan
0004
0005 is2012 = isNewerThan('CMSSW_5_2_0')
0006
0007 class RochesterCorrections(object):
0008
0009 def __init__(self):
0010 self.cor = heppy.RochCor()
0011 self.cor2012 = heppy.RochCor2012()
0012
0013 def corrected_p4( self, particle, run ):
0014 '''Returns the corrected p4 for a particle.
0015
0016 The particle remains unchanged.
0017 '''
0018 ptc = particle
0019 p4 = ptc.p4()
0020 tlp4 = TLorentzVector( p4.px(), p4.py(), p4.pz(), p4.energy() )
0021 cortlp4 = copy.copy(tlp4)
0022 if run<100:
0023 if is2012:
0024 self.cor2012.momcor_mc( cortlp4, ptc.charge(), 0.0, 0 )
0025 else:
0026 self.cor.momcor_mc( cortlp4, ptc.charge(), 0.0, 0 )
0027 else:
0028 if is2012:
0029 self.cor2012.momcor_data( cortlp4, ptc.charge(), 0.0, 0 )
0030 else:
0031 self.cor.momcor_data( cortlp4, ptc.charge(), 0.0, int(run>173692) )
0032 corp4 = p4.__class__( cortlp4.Px(), cortlp4.Py(), cortlp4.Pz(), cortlp4.Energy() )
0033 return corp4
0034
0035
0036 def correct( self, particle, run ):
0037 '''Correct a particles. '''
0038 corp4 = corrected_p4(particle, run)
0039 ptc.setP4( corp4 )
0040
0041 def correct_all( self, particles, run ):
0042 '''Correct a list of particles.
0043
0044 The p4 of each particle will change '''
0045 for ptc in particles:
0046 corp4 = corrected_p4(ptc, run)
0047 ptc.setP4( corp4 )
0048
0049
0050
0051
0052 rochcor = RochesterCorrections()
0053
0054
