def pbremProdRate(mass,epsilon,doprint=False):
xswg = proton_bremsstrahlung.prodRate(mass, epsilon)
if doprint: print "A' production rate per p.o.t: \t %.8g"%(xswg)
rhoff = proton_bremsstrahlung.rhoFormFactor(mass)**2
if doprint: print "A' rho form factor: \t %.8g"%rhoff
if doprint: print "A' rescaled production rate per p.o.t:\t %.8g"%(xswg*rhoff)
return xswg*rhoff
def pbremProdRateNoFF(mass,epsilon,doprint=False):
xswg = proton_bremsstrahlung.prodRate(mass, epsilon)
if doprint: print "A' production rate per p.o.t: \t %.8g"%(xswg)
penalty = proton_bremsstrahlung.penaltyFactor(mass)
if doprint: print "A' penalty factor: \t %.8g"%penalty
if doprint: print "A' rescaled production rate per p.o.t:\t %.8g"%(xswg*penalty)
return xswg*penalty
def pbremProdRate(mass,epsilon,doprint=False):
xswg = proton_bremsstrahlung.prodRate(mass, epsilon)
if doprint: print "A' production rate per p.o.t: \t %.8g"%(xswg)
penalty = proton_bremsstrahlung.penaltyFactor(mass)
if doprint: print "A' penalty factor: \t %.8g"%penalty
if doprint: print "A' rescaled production rate per p.o.t:\t %.8g"%(xswg*penalty)
return xswg*penalty
def configure(P8gen, mass, epsilon, inclusive, deepCopy=False):
# configure pythia8 for Ship usage
debug=True
if debug: cf=open('pythia8_darkphotonconf.txt','w')
#h=readFromAscii()
P8gen.UseRandom3() # TRandom1 or TRandom3 ?
P8gen.SetMom(400) # beam momentum in GeV
if deepCopy: P8gen.UseDeepCopy()
pdg = ROOT.TDatabasePDG.Instance()
if inclusive=="meson":
# let strange particle decay in Geant4
p8 = P8gen.getPythiaInstance()
n=1
while n!=0:
n = p8.particleData.nextId(n)
p = p8.particleData.particleDataEntryPtr(n)
if p.tau0()>1:
command = str(n)+":mayDecay = false"
p8.readString(command)
print "Pythia8 configuration: Made %s stable for Pythia, should decay in Geant4"%(p.name())
# Configuring production
P8gen.SetParameters("SoftQCD:nonDiffractive = on")
if debug: cf.write('P8gen.SetParameters("SoftQCD:nonDiffractive = on")\n')
elif inclusive=="qcd":
P8gen.SetDY()
P8gen.SetMinDPMass(0.7)
if (mass<P8gen.MinDPMass()):
print "WARNING! Mass is too small, minimum is set to %3.3f GeV."%P8gen.MinDPMass()
return 0
# produce a Z' from hidden valleys model
p8 = P8gen.getPythiaInstance()
n=1
while n!=0:
n = p8.particleData.nextId(n)
p = p8.particleData.particleDataEntryPtr(n)
if p.tau0()>1:
command = str(n)+":mayDecay = false"
p8.readString(command)
print "Pythia8 configuration: Made %s stable for Pythia, should decay in Geant4"%(p.name())
# Configuring production
P8gen.SetParameters("HiddenValley:ffbar2Zv = on")
if debug: cf.write('P8gen.SetParameters("HiddenValley:ffbar2Zv = on")\n')
P8gen.SetParameters("HiddenValley:Ngauge = 1")
elif inclusive=="pbrem":
P8gen.SetParameters("ProcessLevel:all = off")
if debug: cf.write('P8gen.SetParameters("ProcessLevel:all = off")\n')
#Also allow resonance decays, with showers in them
#P8gen.SetParameters("Standalone:allowResDec = on")
#Optionally switch off decays.
#P8gen.SetParameters("HadronLevel:Decay = off")
#Switch off automatic event listing in favour of manual.
P8gen.SetParameters("Next:numberShowInfo = 0")
P8gen.SetParameters("Next:numberShowProcess = 0")
P8gen.SetParameters("Next:numberShowEvent = 0")
proton_bremsstrahlung.protonEnergy=P8gen.GetMom()
norm=proton_bremsstrahlung.prodRate(mass, epsilon)
print "A' production rate per p.o.t: \t %.8g"%norm
P8gen.SetPbrem(proton_bremsstrahlung.hProdPDF(mass, epsilon, norm, 350, 1500))
#Define dark photon
DP_instance = darkphoton.DarkPhoton(mass,epsilon)
ctau = DP_instance.cTau()
print 'ctau p8dpconf file =%3.6f cm'%ctau
print 'Initial particle parameters for PDGID %d :'%P8gen.GetDPId()
P8gen.List(P8gen.GetDPId())
if inclusive=="qcd":
P8gen.SetParameters(str(P8gen.GetDPId())+":m0 = "+str(mass))
#P8gen.SetParameters(str(P8gen.GetDPId())+":mWidth = "+str(u.mm/ctau))
P8gen.SetParameters(str(P8gen.GetDPId())+":mWidth = "+str(u.hbarc/ctau))
P8gen.SetParameters(str(P8gen.GetDPId())+":mMin = 0.001")
P8gen.SetParameters(str(P8gen.GetDPId())+":tau0 = "+str(ctau/u.mm))
#P8gen.SetParameters("ParticleData:modeBreitWigner = 0")
#P8gen.SetParameters(str(P8gen.GetDPId())+":isResonance = false")
#P8gen.SetParameters(str(P8gen.GetDPId())+":all = A A 3 0 0 "+str(mass)+" 0.0 0.0 0.0 "+str(ctau/u.mm)+" 0 1 0 1 0")
#if debug: cf.write('P8gen.SetParameters("'+str(P8gen.GetDPId())+':all = A A 3 0 0 '+str(mass)+' 0.0 0.0 0.0 '+str(ctau/u.mm)+' 0 1 0 1 0") \n')
P8gen.SetParameters(str(P8gen.GetDPId())+":onMode = off")
#print 'qcd inclusive test'
else:
P8gen.SetParameters(str(P8gen.GetDPId())+":new = A A 3 0 0 "+str(mass)+" 0.0 0.0 0.0 "+str(ctau/u.mm)+" 0 1 0 1 0")
if debug: cf.write('P8gen.SetParameters("'+str(P8gen.GetDPId())+':new = A A 3 0 0 '+str(mass)+' 0.0 0.0 0.0 '+str(ctau/u.mm)+' 0 1 0 1 0") \n')
#if (inclusive=="pbrem"):
### Do not set as resonance: decays to hadron doesn't work properly below 0.7 GeV.
# P8gen.SetParameters(str(P8gen.GetDPId())+":isResonance = true")
# P8gen.SetParameters(str(P8gen.GetDPId())+":mWidth = "+str(u.hbarc/ctau))
# P8gen.SetParameters(str(P8gen.GetDPId())+":mMin = 0.001")
P8gen.SetParameters("Next:numberCount = 0")
if debug: cf.write('P8gen.SetParameters("Next:numberCount = 0")\n')
# Configuring decay modes...
readDecayTable.addDarkPhotondecayChannels(P8gen,DP_instance, conffile=os.path.expandvars('$FAIRSHIP/python/darkphotonDecaySelection.conf'), verbose=True)
# Finish HNL setup...
P8gen.SetParameters(str(P8gen.GetDPId())+":mayDecay = on")
if debug: cf.write('P8gen.SetParameters("'+str(P8gen.GetDPId())+':mayDecay = on")\n')
#P8gen.SetDPId(P8gen.GetDPId())
#if debug: cf.write('P8gen.SetDPId(%d)\n',%P8gen.GetDPId())
# also add to PDG
gamma = u.hbarc / float(ctau) #197.3269631e-16 / float(ctau) # hbar*c = 197 MeV*fm = 197e-16 GeV*cm
print 'gamma=%e'%gamma
addDPtoROOT(pid=P8gen.GetDPId(),m=mass,g=gamma)
if inclusive=="meson":
#change meson decay to dark photon depending on mass
selectedMum = manipulatePhysics(mass, P8gen, cf)
print 'selected mum is : %d'%selectedMum
if (selectedMum == -1): return 0
#P8gen.SetParameters("Check:particleData = on")
if debug: cf.close()
return 1
def configure(P8gen, mass, epsilon, inclusive, deepCopy=False):
# configure pythia8 for Ship usage
debug = True
if debug: cf = open('pythia8_darkphotonconf.txt', 'w')
#h=readFromAscii()
P8gen.UseRandom3() # TRandom1 or TRandom3 ?
P8gen.SetMom(400) # beam momentum in GeV
if deepCopy: P8gen.UseDeepCopy()
pdg = ROOT.TDatabasePDG.Instance()
if inclusive == "meson":
# let strange particle decay in Geant4
p8 = P8gen.getPythiaInstance()
n = 1
while n != 0:
n = p8.particleData.nextId(n)
p = p8.particleData.particleDataEntryPtr(n)
if p.tau0() > 1:
command = str(n) + ":mayDecay = false"
p8.readString(command)
print "Pythia8 configuration: Made %s stable for Pythia, should decay in Geant4" % (
p.name())
# Configuring production
P8gen.SetParameters("SoftQCD:nonDiffractive = on")
if debug:
cf.write('P8gen.SetParameters("SoftQCD:nonDiffractive = on")\n')
elif inclusive == "qcd":
P8gen.SetDY()
P8gen.SetMinDPMass(0.7)
if (mass < P8gen.MinDPMass()):
print "WARNING! Mass is too small, minimum is set to %3.3f GeV." % P8gen.MinDPMass(
)
return 0
# produce a Z' from hidden valleys model
p8 = P8gen.getPythiaInstance()
n = 1
while n != 0:
n = p8.particleData.nextId(n)
p = p8.particleData.particleDataEntryPtr(n)
if p.tau0() > 1:
command = str(n) + ":mayDecay = false"
p8.readString(command)
print "Pythia8 configuration: Made %s stable for Pythia, should decay in Geant4" % (
p.name())
# Configuring production
P8gen.SetParameters("HiddenValley:ffbar2Zv = on")
if debug:
cf.write('P8gen.SetParameters("HiddenValley:ffbar2Zv = on")\n')
P8gen.SetParameters("HiddenValley:Ngauge = 1")
elif inclusive == "pbrem":
P8gen.SetParameters("ProcessLevel:all = off")
if debug: cf.write('P8gen.SetParameters("ProcessLevel:all = off")\n')
#Also allow resonance decays, with showers in them
#P8gen.SetParameters("Standalone:allowResDec = on")
#Optionally switch off decays.
#P8gen.SetParameters("HadronLevel:Decay = off")
#Switch off automatic event listing in favour of manual.
P8gen.SetParameters("Next:numberShowInfo = 0")
P8gen.SetParameters("Next:numberShowProcess = 0")
P8gen.SetParameters("Next:numberShowEvent = 0")
proton_bremsstrahlung.protonEnergy = P8gen.GetMom()
norm = proton_bremsstrahlung.prodRate(mass, epsilon)
print "A' production rate per p.o.t: \t %.8g" % norm
P8gen.SetPbrem(
proton_bremsstrahlung.hProdPDF(mass, epsilon, norm, 350, 1500))
#Define dark photon
DP_instance = darkphoton.DarkPhoton(mass, epsilon)
ctau = DP_instance.cTau()
print 'ctau p8dpconf file =%3.6f cm' % ctau
print 'Initial particle parameters for PDGID %d :' % P8gen.GetDPId()
P8gen.List(P8gen.GetDPId())
if inclusive == "qcd":
P8gen.SetParameters(str(P8gen.GetDPId()) + ":m0 = " + str(mass))
#P8gen.SetParameters(str(P8gen.GetDPId())+":mWidth = "+str(u.mm/ctau))
P8gen.SetParameters(
str(P8gen.GetDPId()) + ":mWidth = " + str(u.hbarc / ctau))
P8gen.SetParameters(str(P8gen.GetDPId()) + ":mMin = 0.001")
P8gen.SetParameters(
str(P8gen.GetDPId()) + ":tau0 = " + str(ctau / u.mm))
#P8gen.SetParameters("ParticleData:modeBreitWigner = 0")
#P8gen.SetParameters(str(P8gen.GetDPId())+":isResonance = false")
#P8gen.SetParameters(str(P8gen.GetDPId())+":all = A A 3 0 0 "+str(mass)+" 0.0 0.0 0.0 "+str(ctau/u.mm)+" 0 1 0 1 0")
#if debug: cf.write('P8gen.SetParameters("'+str(P8gen.GetDPId())+':all = A A 3 0 0 '+str(mass)+' 0.0 0.0 0.0 '+str(ctau/u.mm)+' 0 1 0 1 0") \n')
P8gen.SetParameters(str(P8gen.GetDPId()) + ":onMode = off")
#print 'qcd inclusive test'
else:
P8gen.SetParameters(
str(P8gen.GetDPId()) + ":new = A A 3 0 0 " + str(mass) +
" 0.0 0.0 0.0 " + str(ctau / u.mm) + " 0 1 0 1 0")
if debug:
cf.write('P8gen.SetParameters("' + str(P8gen.GetDPId()) +
':new = A A 3 0 0 ' + str(mass) + ' 0.0 0.0 0.0 ' +
str(ctau / u.mm) + ' 0 1 0 1 0") \n')
#if (inclusive=="pbrem"):
### Do not set as resonance: decays to hadron doesn't work properly below 0.7 GeV.
# P8gen.SetParameters(str(P8gen.GetDPId())+":isResonance = true")
# P8gen.SetParameters(str(P8gen.GetDPId())+":mWidth = "+str(u.hbarc/ctau))
# P8gen.SetParameters(str(P8gen.GetDPId())+":mMin = 0.001")
P8gen.SetParameters("Next:numberCount = 0")
if debug: cf.write('P8gen.SetParameters("Next:numberCount = 0")\n')
# Configuring decay modes...
readDecayTable.addDarkPhotondecayChannels(
P8gen,
DP_instance,
conffile=os.path.expandvars(
'$FAIRSHIP/python/darkphotonDecaySelection.conf'),
verbose=True)
# Finish HNL setup...
P8gen.SetParameters(str(P8gen.GetDPId()) + ":mayDecay = on")
if debug:
cf.write('P8gen.SetParameters("' + str(P8gen.GetDPId()) +
':mayDecay = on")\n')
#P8gen.SetDPId(P8gen.GetDPId())
#if debug: cf.write('P8gen.SetDPId(%d)\n',%P8gen.GetDPId())
# also add to PDG
gamma = u.hbarc / float(
ctau
) #197.3269631e-16 / float(ctau) # hbar*c = 197 MeV*fm = 197e-16 GeV*cm
print 'gamma=%e' % gamma
addDPtoROOT(pid=P8gen.GetDPId(), m=mass, g=gamma)
if inclusive == "meson":
#change meson decay to dark photon depending on mass
selectedMum = manipulatePhysics(mass, P8gen, cf)
print 'selected mum is : %d' % selectedMum
if (selectedMum == -1): return 0
#P8gen.SetParameters("Check:particleData = on")
if debug: cf.close()
return 1
';m_{#gamma^{D}} (GeV); #sigma_{meson}/#varepsilon^2 (mb)', 1000,
0., 10.)
h['xsMeson'].Sumw2()
ut.bookHist(h, 'xsQCD',
';m_{#gamma^{D}} (GeV); #sigma_{qcd}/#varepsilon^2 (mb)', 1000, 0.,
10.)
h['xsMeson'].Sumw2()
print proton_bremsstrahlung.rhoFormFactor(
0), proton_bremsstrahlung.rhoFormFactor(
0.77), proton_bremsstrahlung.rhoFormFactor(2.)
for step in range(0, 1000):
mass = step * 0.0100000
xswg = proton_bremsstrahlung.prodRate(400, mass, epsilon) * 10.7
penalty = proton_bremsstrahlung.penaltyFactor(mass)
rhoff = proton_bremsstrahlung.rhoFormFactor(mass)
#if (rhoff<1): rhoff = 1
h['xsPbrem'].SetBinContent(step + 1, xswg * penalty / (epsilon**2))
h['xsPbremNew'].SetBinContent(step + 1,
xswg * penalty * rhoff**2 / (epsilon**2))
h['xsPbremFF'].SetBinContent(step + 1, xswg * rhoff**2 / (epsilon**2))
for step in range(0, 900):
mass = math.sqrt(step * 0.0100000)
rhoff = proton_bremsstrahlung.rhoFormFactor(mass)
h['ff'].SetBinContent(step + 1, rhoff)
h['xsPbremFF'].Sumw2()
ut.bookHist(h,'xsPbremFix',';m_{#gamma^{D}} (GeV); #sigma_{pbrem}/#varepsilon^2 (mb)',1000,0.,10.)
h['xsPbremFix'].Sumw2()
ut.bookHist(h,'xsPbremFFFix',';m_{#gamma^{D}} (GeV); #sigma_{pbrem}/#varepsilon^2 (mb)',1000,0.,10.)
h['xsPbremFFFix'].Sumw2()
ut.bookHist(h,'xsPbremvsp',';p_{p} (GeV); #sigma_{pbrem}/#varepsilon^2 (mb)',401,-0.5,400.5)
h['xsPbremvsp'].Sumw2()
#print proton_bremsstrahlung.rhoFormFactor(0),proton_bremsstrahlung.rhoFormFactor(0.77),proton_bremsstrahlung.rhoFormFactor(2.)
for step in range(0,1000):
mass=step*0.0100000
xswg = proton_bremsstrahlung.prodRate(400,mass, epsilon)*10.7
xswgFix = proton_bremsstrahlung.prodRate(400,mass, epsilon,-0.1,0.1,proton_bremsstrahlung.pMinFix(400,mass),proton_bremsstrahlung.pMaxFix(400,mass))*10.7
penalty = proton_bremsstrahlung.penaltyFactor(mass)
rhoff = proton_bremsstrahlung.rhoFormFactor(mass)
h['xsPbrem'].SetBinContent(step+1,xswg*penalty/(epsilon**2))
h['xsPbremFF'].SetBinContent(step+1,xswg*rhoff**2/(epsilon**2))
h['xsPbremFix'].SetBinContent(step+1,xswgFix*penalty/(epsilon**2))
h['xsPbremFFFix'].SetBinContent(step+1,xswgFix*rhoff**2/(epsilon**2))
#for step in range(1,401):
# E=step
# proton_bremsstrahlung.protonEnergy=E
# pmom=proton_bremsstrahlung.protonMomentum(E);