Update pythia8_hi.cfg

Author: sgaretti

MC/config/common/pythia8/generator/pythia8_hi.cfg

@@ -1,15 +1,19 @@
-### beams
-Beams:idA 1000822080		# Pb
-Beams:idB 1000822080		# Pb
-Beams:eCM 5520. 		# GeV
+### Specify beams
+Beams:idA = 1000822080
+Beams:idB = 1000822080            
+Beams:eCM = 5360.0  #GeV
 
-### heavy-ion settings (valid for Pb-Pb 5520 only)
-HeavyIon:SigFitNGen = 0
-HeavyIon:SigFitDefPar = 13.88,1.84,0.22,0.0,0.0,0.0,0.0,0.0
-HeavyIon:bWidth = 14.48
+Beams:frameType = 1
+### decays
+ParticleDecays:limitTau0 = on
+ParticleDecays:tau0Max = 10.      ### match alice: 1cm/c = 10.0mm/c
 
-### processes (apparently not to be defined)
+### Save some CPU at init of jobs
+### To avoid refitting, add the following line to your configuration file:
+HeavyIon:SigFitNGen = 0
 
-### decays
-ParticleDecays:limitTau0 on	
-ParticleDecays:tau0Max 10.	
+### Initialize the Angantyr model to fit the total and semi-inclusive
+### These parameters are typically suitable for sqrt(S_NN)=5TeV
+HeavyIon:SigFitDefPar = 2.15, 17.24, 0.33
+    
+Random:setSeed = on