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pythia8's Issues

Pythia main03.cc for normailzing number

// Final statistics. Normalize and output histograms.
pythia.stat();
dndy *= 5. / nEvent;
dndeta *= 5. / nEvent;
dndpT *= 10. / nEvent;
cout << pThard << nFinal << nCharged << dndy << dndeta << dndpT << epCons;
######################################################
How you normalize this histograms? I don't understand the number("5"/"10") meaning, It is a unit transformation?

Question for pythia/examples/powheg-hvq.lhe in line 61-67

5 1006 1.00000E+00 1.90417E+01 0.00000E+00 0.00000E+00 21 -1 0 0 134 135 0.000000000E+00 0.000000000E+00 2.693639711E+02 2.693639711E+02 0.000000000E+00 0.00000E+00 9.000E+00 21 -1 0 0 132 133 0.000000000E+00 0.000000000E+00 -5.818116662E+02 5.818116662E+02 0.000000000E+00 0.00000E+00 9.000E+00 6 1 1 2 132 0 5.649633545E+01 -1.409096557E+02 -3.628291203E+02 4.288745010E+02 1.710000000E+02 0.00000E+00 9.000E+00 -6 1 1 2 0 135 -4.477951077E+01 1.559196728E+02 1.766816856E+02 2.945735341E+02 1.710000000E+02 0.00000E+00 9.000E+00 21 1 1 2 134 133 -1.171682467E+01 -1.501001705E+01 -1.263002604E+02 1.277276022E+02 0.000000000E+00 0.00000E+00 9.000E+00 ------------------------------------------------------------------------------------------- I don't undestand the meanning of this event information as a new hand, for example what's the meanning of line 62 => 21(?) -1(?) 0(?) 0(?) 134(?) 135(?) 0.000000000E+009(?) 0.000000000E+00(?) 2.693639711E+02(?) 2.693639711E+02(?) 0.000000000E+00(?) 0.00000E+00(?) 9.000E+00(?) Thanks!

Another question not refered from this examples for pythia event list confused me, The events contains many particles information, for example four vector and mass and particle ID etc. Follow is the list information:

id name status mothers daughters colours p_x p_y p_z e m

What does the colours number meaning? And colours numbers usually larger than 100, Could you give an explainanation on colours=105? Thanks!

If ARCH is set compilation fails

If the environmental variable ARCH is set but not as what is expected here: https://github.com/cms-externals/pythia8/blob/master/configure#L205, the compilation fails when building the library archive due to an incorrect substitution in the library list:

ar cru lib/libpythia8.a tmp/Analysis.o tmp/Basics.o tmp/BeamParticle.o tmp/BeamRemnants.o tmp/BeamShape.o tmp/BoseEinstein.o tmp/ColourReconnection.o tmp/ColourTracing.o tmp/Event.o tmp/FJcore.o tmp/FragmentationFlavZpT.o tmp/FragmentationSystems.o tmp/HadronLevel.o tmp/HadronScatter.o tmp/HardDiffraction.o tmp/HelicityBasics.o tmp/HelicityMatrixElements.o tmp/HiddenValleyFragmentation.o tmp/History.o tmp/Info.o tmp/JunctionSplitting.o tmp/LHEF3.o tmp/LesHouches.o tmp/Merging.o tmp/MergingHooks.o tmp/MiniStringFragmentation.o tmp/MultipartonInteractions.o tmp/ParticleData.o tmp/ParticleDecays.o tmp/PartonDistributions.o tmp/PartonLevel.o tmp/PartonSystems.o tmp/PhaseSpace.o tmp/ProcessContainer.o tmp/ProcessLevel.o tmp/Pythia.o tmp/PythiaStdlib.o tmp/RHadrons.o tmp/ResonanceDecays.o tmp/ResonanceWidths.o tmp/SLHAinterface.o tmp/Settings.o tmp/SigmaCompositeness.o tmp/SigmaEW.o tmp/SigmaExtraDim.o tmp/SigmaGeneric.o tmp/SigmaHiggs.o tmp/SigmaLeftRightSym.o tmp/SigmaLeptoquark.o tmp/SigmaNewGaugeBosons.o tmp/SigmaOnia.o tmp/SigmaProcess.o tmp/SigmaQCD.o tmp/SigmaSUSY.o tmp/SigmaTotal.o tmp/SpaceShower.o tmp/StandardModel.o tmp/Streams.o tmp/StringFragmentation.o tmp/StringLength.o tmp/SusyCouplings.o tmp/SusyLesHouches.o tmp/SusyResonanceWidths.o tmp/SusyWidthFunctions.o tmp/TauDecays.o tmp/TimeShower.o tmp/UserHooks.o tmp/WeakShowerMEs.o
g++ tmp/Analysis.o tmp/Basics.o tmp/BeamParticle.o tmp/BeamRemnants.o tmp/BeamShape.o tmp/BoseEinstein.o tmp/ColourReconnection.o tmp/ColourTracing.o tmp/Event.o tmp/FJcore.o tmp/FragmentationFlavZpT.o tmp/FragmentationSystems.o tmp/HadronLevel.o tmp/HadronScatter.o tmp/HardDiffraction.o tmp/HelicityBasics.o tmp/HelicityMatrixElements.o tmp/HiddenValleyFragmentation.o tmp/History.o tmp/Info.o tmp/JunctionSplitting.o tmp/LHEF3.o tmp/LesHouches.o tmp/Merging.o tmp/MergingHooks.o tmp/MiniStringFragmentation.o tmp/MultipartonInteractions.o tmp/ParticleData.o tmp/ParticleDecays.o tmp/PartonDistributions.o tmp/PartonLevel.o tmp/PartonSystems.o tmp/PhaseSpace.o tmp/ProcessContainer.o tmp/ProcessLevel.o tmp/Pythia.o tmp/PythiaStdlib.o tmp/RHadrons.o tmp/ResonanceDecays.o tmp/ResonanceWidths.o tmp/SLHAinterface.o tmp/Settings.o tmp/SigmaCompositeness.o tmp/SigmaEW.o tmp/SigmaExtraDim.o tmp/SigmaGeneric.o tmp/SigmaHiggs.o tmp/SigmaLeftRightSym.o tmp/SigmaLeptoquark.o tmp/SigmaNewGaugeBosons.o tmp/SigmaOnia.o tmp/SigmaProcess.o tmp/SigmaQCD.o tmp/SigmaSUSY.o tmp/SigmaTotal.o tmp/SpaceShower.o tmp/StandardModel.o tmp/Streams.o tmp/StringFragmentation.o tmp/StringLength.o tmp/SusyCouplings.o tmp/SusyLesHouches.o tmp/SusyResonanceWidths.o tmp/SusyWidthFunctions.o tmp/TauDecays.o tmp/TimeShower.o tmp/UserHooks.o tmp/WeakShowerMEs.o -o lib/libpythia8 -Iinclude -O2 -ansi -pedantic -W -Wall -Wshadow -fPIC  ,libpythia8\
     -ldl
g++: error: ,libpythia8: No such file or directory
make: *** [lib/libpythia8] Error 1

Since the variable ARCH is used in many other instances the configuration script should be protected against values of ARCH that are different from what the script expect.
@davidlt @bendavid

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