MC/PWGEM: update DY simulation

Author: dsekihat

MC/config/PWGEM/pythia8/generator/pythia8_DY.cfg

@@ -4,10 +4,11 @@ Beams:idB 2212 			# proton
 Beams:eCM 13600. 		# GeV #user can change eCM from command line.
 
 ### processes
-WeakSingleBoson:ffbar2ffbar(s:gmZ) on # ffbar -> Z/gamma* -> ffbar
-PhaseSpace:mHatMin 0
-PhaseSpace:mHatMax -1
-PhaseSpace:pTHatMinDiverge 0.5 # this allows for mll > 1 GeV/c2
+WeakSingleBoson:ffbar2gmZ on # ffbar -> Z/gamma*
+PhaseSpace:mHatMin 0.5
+PhaseSpace:mHatMax 15
+23:mMin 0.5
+TimeShower:mMaxGamma 0.5
 23:onMode off # switch off all Z0 decay channels. # User must switch back on Z0 going to l+ l- in C or ini. gamma* is tread as 23, too.
 
 ### decays