Interface to pythia tunes added.

[u/mrichter/AliRoot.git] / PYTHIA6 / AliPythia6.cxx

diff --git a/PYTHIA6/AliPythia6.cxx b/PYTHIA6/AliPythia6.cxx
index f8c761f3fec84cd55dba0dd7060accbbb048fad3..443f11d4e1ecc484ce82f357a7af6be5771544a9 100644 (file)
--- a/PYTHIA6/AliPythia6.cxx
+++ b/PYTHIA6/AliPythia6.cxx
@@ -494,6 +494,7 @@ void AliPythia6::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfu
        // Set b-quark mass
        SetPMAS(5,1,4.75);
       break;
+     case kPyBeautyJets: 
      case kPyBeautyppMNRwmi:
       // Tuning of Pythia parameters aimed to get a resonable agreement
       // between with the NLO calculation by Mangano, Nason, Ridolfi for the
@@ -1142,7 +1143,7 @@ void  AliPythia6::Quench()
                //
                // Isotropic decay ????
                Double_t cost = 2. * gRandom->Rndm() - 1.;
-               Double_t sint = TMath::Sqrt(1. - cost * cost);
+               Double_t sint = TMath::Sqrt((1.-cost)*(1.+cost));
                Double_t phis =  2. * TMath::Pi() * gRandom->Rndm();
                
                Double_t pz1 =   pst * cost;