#include <TParticle.h>
#include <TROOT.h>
#include <TVirtualMC.h>
+#include <TLorentzVector.h>
#include "AliConst.h"
#include "AliDecayer.h"
fCmin(0.),
fCmax(100.),
fChangeWithCentrality(kFALSE),
- fYMaxValue(2.0)
+ fYMaxValue(2.0),
+ fYlimitForFlatness(2.0),
+ fYdecreaseSp(0.2),
+ fYdecreaseV2(0.2)
{
//
// Default constructor
SetParameters(centrality);
+ if(!fChangeWithCentrality){
+ Float_t in=0;
+ for(Int_t i=0;i < fgNspecies;i++){
+ in=0;
+ if(fgHSpectrum[i]){
+ for(Int_t j=1;j<=fgHSpectrum[i]->GetNbinsX();j++){
+ in += fgHSpectrum[i]->GetBinContent(j)*fgHSpectrum[i]->GetBinWidth(j);
+ }
+ }
+
+ // replace n-particles with the one in input file if centralidy dependece was disable
+ fgMult[i] = in;
+ }
+ }
+
+
TMCProcess statusPdg[fgNspecies] = {kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary,kPPrimary};
Float_t parV2scaling[3] = {1,0.202538,-0.00214468};
Float_t psi = gRandom->Rndm()*TMath::Pi();
fgEventplane = psi;
Float_t psi3 = gRandom->Rndm()*TMath::Pi()*2/3;
+ Float_t psi4 = gRandom->Rndm()*TMath::Pi()*2/4;
fgV2->SetParameter(1,psi);
fgV2->SetParameter(3,psi3);
+ fgV2->SetParameter(4,psi4);
Int_t npart = 0;
for(Int_t isp=0;isp < fgNspecies;isp++){
if(! fgHSpectrum[isp]) continue;
- printf("Total number of %i = %f\n",fgPdgInput[isp],fgMult[isp]*2*fYMaxValue);
+ Int_t npartSp = Int_t(fgMult[isp]*2*fYMaxValue + gRandom->Rndm());
- for(Int_t ipart =0; ipart < fgMult[isp]*2*fYMaxValue; ipart++){
+ printf("Total number of %i = %i\n",fgPdgInput[isp],npartSp);
+
+ for(Int_t ipart =0; ipart < npartSp; ipart++){
Int_t pdg = fgPdgInput[isp];
Double_t y = gRandom->Rndm()*2*fYMaxValue - fYMaxValue;
+ Double_t ytanh = TMath::TanH(y);
Double_t pt = fgHSpectrum[isp]->GetRandom();
- if(fgHv2[isp]) fgV2->SetParameter(0,fgHv2[isp]->Interpolate(pt) * scaleV2);
- else fgV2->SetParameter(0,0.);
Double_t mass = pdgD->GetParticle(pdg)->Mass();
Double_t mt2 = pt*pt + mass*mass;
+ Double_t pz = ytanh*TMath::Sqrt(mt2)/TMath::Sqrt(1-ytanh*ytanh);
+ Double_t etot = TMath::Sqrt(mt2 + pz*pz);
+ TLorentzVector tempVect(pt,0,pz,etot);
+ // Double_t eta = tempVect.PseudoRapidity();
+ Double_t scaleEtaV2 = 1; // set the eta dependence
+ if(TMath::Abs(y)> fYlimitForFlatness) scaleEtaV2 = 1 - fYdecreaseV2*(TMath::Abs(y) - fYlimitForFlatness);
+
+ if(fgHv2[isp]) fgV2->SetParameter(0,fgHv2[isp]->Interpolate(pt) * scaleV2 * scaleEtaV2);
+ else fgV2->SetParameter(0,0.);
Double_t phi = fgV2->GetRandom(-TMath::Pi(),TMath::Pi());
Double_t px = pt*TMath::Cos(phi);
Double_t py = pt*TMath::Sin(phi);
- y = TMath::TanH(y);
- Double_t pz = y*TMath::Sqrt(mt2)/TMath::Sqrt(1-y*y);
-// Double_t etot = TMath::Sqrt(mt2 + pz*pz);
- Float_t p[3] = {px,py,pz};
+ Float_t p[3] = {static_cast<Float_t>(px),static_cast<Float_t>(py),static_cast<Float_t>(pz)};
Float_t polar[3] = {0.,0.,0.};
- PushTrack(1, -1, pdg, p, origin0, polar, time, statusPdg[isp], npart, 1., 1);
- KeepTrack(npart);
- npart++;
+ if(TMath::Abs(y)< fYlimitForFlatness || gRandom->Rndm() < 1 - fYdecreaseSp*(TMath::Abs(y) - fYlimitForFlatness)){// check on pseudorapidity distribution
+ // printf("%f %f\n",eta,phi - psi); // for debugging
+ PushTrack(1, -1, pdg, p, origin0, polar, time, statusPdg[isp], npart, 1., 1);
+ KeepTrack(npart);
+ npart++;
+ }
}
}
header->SetCentrality(centrality);
header->SetPsi2(psi);
header->SetPsi3(psi3);
+ header->SetPsi4(psi4);
gAlice->SetGenEventHeader(header);
}
//_____________________________________________________________________________
void AliGenTunedOnPbPb::SetParameters(Float_t centrality){
- if(!fgV2) fgV2 = new TF1("fv2Par","(1 + 2*[0]*cos(2*(x-[1])) + 2*[0]*[2]*cos(3*(x-[3])))",-TMath::Pi(),TMath::Pi());
+ if(!fgV2) fgV2 = new TF1("fv2Par","TMath::Max(0.,(1 + 2*[0]*cos(2*(x-[1])) + 2*[0]*[2]*cos(3*(x-[3])) + [0]*[2]*cos(4*(x-[4]))))",-TMath::Pi(),TMath::Pi()); // v4 is approx. 0.5*v3
Float_t fr[9] = {0.,0.,0.,0.,0.,0.,0.,0.,0.};
}
// parameters as a function of centrality
- Float_t multCent[9*fgNspecies] = {680.,680.,680.,110.,110.,34.,34.,110.,28.,28.,11.5,3.1,3.1,0.5,0.5,
- 560.,560.,560.,92.,92.,28.,28.,92.,24.,24.,9.,2.7,2.7,0.45,0.45,
- 450.,450.,450.,70.,70.,21.,21.,70.,20.,20.,8.,2.4,2.4,0.4,0.4,
- 302.,302.,302.,47.,47.,14.5,14.5,47.,14.,14.,5.5,1.5,1.5,0.2,0.2,
- 200.,200.,200.,30.,30.,9.6,9.6,30.,9.,9.,3.5,0.9,0.9,0.08,0.08,
- 120.,120.,120.,18.,18.,6.1,6.1,18.,5.1,5.1,2.2,0.6,0.6,0.055,0.055,
- 70.,70.,70.,10.4,10.4,3.6,3.6,10.4,2.6,2.6,1.4,0.36,0.36,0.035,0.035,
- 36.,36.,36.,5.25,5.25,2.,2.,5.25,1.5,1.5,0.5,0.02,0.02,0.015,0.015,
+ Float_t multCent[9*fgNspecies] = {733.,733.,733.,109.,109.,34.,34.,109.,28.,28.,11.5,3.1,3.1,0.5,0.5,
+ 606.,606.,606.,91.,91.,28.,28.,91.,24.,24.,9.,2.7,2.7,0.45,0.45,
+ 455.,455.,455.,68.,68.,21.,21.,68.,20.,20.,8.,2.4,2.4,0.4,0.4,
+ 307.,307.,307.,46.,46.,14.5,14.5,46.,14.,14.,5.5,1.5,1.5,0.2,0.2,
+ 201.,201.,201.,30.,30.,9.6,9.6,30.,9.,9.,3.5,0.9,0.9,0.08,0.08,
+ 124.,124.,124.,18.3,18.3,6.1,6.1,18.3,5.1,5.1,2.2,0.6,0.6,0.055,0.055,
+ 71.,71.,71.,10.2,10.2,3.6,3.6,10.2,2.6,2.6,1.4,0.36,0.36,0.035,0.035,
+ 37.,37.,37.,5.1,5.1,2.,2.,5.1,1.5,1.5,0.5,0.02,0.02,0.015,0.015,
17.,17.,17.,2.3,2.3,0.9,0.9,2.3,0.6,0.6,0.16,0.006,0.006,0.005,0.005};
Float_t v3Overv2Cent[9] = {1.2,0.82,0.625,0.5,0.45,0.4,0.37,0.3,0.3};
+ fgV3Overv2 = 0;
+ for(Int_t j=0;j < 9;j++)
+ fgV3Overv2 += fr[j]*v3Overv2Cent[j];
+
// set parameters for current centrality
for(Int_t i=0;i < fgNspecies;i++){
fgMult[i] = 0;
fgMult[i] += fr[j]*multCent[i+j*fgNspecies];
}
}
-
- fgV3Overv2 = 0;
- for(Int_t j=0;j < 9;j++)
- fgV3Overv2 += fr[j]*v3Overv2Cent[j];
if(centrality > 80){
for(Int_t i=0;i < fgNspecies;i++)
fgMult[i] /= TMath::Log(centrality-77.);
}
-
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff