Pythia Tune-A from CDF used for jet production.

diff --git a/PYTHIA6/AliPythia.cxx b/PYTHIA6/AliPythia.cxx
index 7dc79c6737de62465141c9c19e7f80a7428779ff..0909aa68ceb9fc5c4d3bebeb442c0b05b64a48d1 100644 (file)
--- a/PYTHIA6/AliPythia.cxx
+++ b/PYTHIA6/AliPythia.cxx
@@ -203,6 +203,17 @@ void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfun
 //  QCD Jets
 //
        SetMSEL(1);
+//
+// Pythia Tune A (CDF)
+//
+       SetPARP(67,4.);            // Regulates Initial State Radiation
+       SetMSTP(82,4);             // Double Gaussian Model
+       SetPARP(82,2.0);           // [GeV]    PT_min at Ref. energy
+       SetPARP(84,0.4);           // Core radius
+       SetPARP(85,0.90) ;         // Regulates gluon prod. mechanism
+       SetPARP(86,0.95);          // Regulates gluon prod. mechanism
+       SetPARP(89,1800.);         // [GeV]   Ref. energy
+       SetPARP(90,0.25);          // 2*epsilon (exponent in power law)
        break;
     case kPyDirectGamma:
        SetMSEL(10);
@@ -1245,4 +1256,3 @@ void AliPythia::GetQuenchingParameters(Double_t& xp, Double_t& yp, Double_t z[4]
 
 }
 
-