//
// class implements pair of particles and taking care of caluclation (almost)
// all of pair properties (Qinv, InvMass,...)
-// more info: http://alisoft.cern.ch/people/skowron/analyzer/index.html
+//
+// more info: http://aliweb.cern.ch/people/skowron/analyzer/index.html
//
////////////////////////////////////////////////////////////////////////////
-#include "AliHBTParticle.h"
+#include "AliVAODParticle.h"
#include "AliHBTWeights.h"
ClassImp(AliHBTPair)
/************************************************************************/
AliHBTPair::AliHBTPair(Bool_t rev):
- fPart1(0x0),
- fPart2(0x0),
- fSwapedPair(0x0),
- fQSideCMSLC(0.0),
- fQSideCMSLCNotCalc(kTRUE),
- fQOutCMSLC(0.0),
- fQOutCMSLCNotCalc(kTRUE),
- fQLongCMSLC(0.0),
- fQLongCMSLCNotCalc(kTRUE),
- fQInv(0.0),
- fQInvNotCalc(kTRUE),
- fInvMass(0.0),
- fInvMassNotCalc(kTRUE),
- fKt(0.0),
- fKtNotCalc(kTRUE),
- fKStar(0.0),
- fKStarNotCalc(kTRUE),
- fPInv(0.0),
- fQSide(0.0),
- fOut(0.0),
- fQLong(0.0),
- fMt(0.0),
- fMtNotCalc(kTRUE),
- fInvMassSqr(0.0),
- fMassSqrNotCalc(kTRUE),
- fQInvL(0.0),
- fQInvLNotCalc(kTRUE),
+ AliAODPair(rev),
fWeight(0.0),
- fWeightNotCalc(kTRUE),
- fPxSum(0.0),
- fPySum(0.0),
- fPzSum(0.0),
- fESum(0.0),
- fSumsNotCalc(kTRUE),
- fPxDiff(0.0),
- fPyDiff(0.0),
- fPzDiff(0.0),
- fEDiff(0.0),
- fDiffsNotCalc(kTRUE),
- fGammaCMSLC(0.0),
- fGammaCMSLCNotCalc(kTRUE),
- fChanged(kTRUE)
+ fWeightNotCalc(kTRUE)
{
-//value of rev defines if it is Swaped
-//if you pass kTRUE swpaped pair will NOT be created
-//though you wont be able to get the swaped pair from this pair
-
- if(!rev) fSwapedPair = new AliHBTPair(kTRUE); //if false create swaped pair
+//Constructor
}
/************************************************************************/
-AliHBTPair::AliHBTPair(AliHBTParticle* part1, AliHBTParticle* part2, Bool_t rev):
- fPart1(part1),
- fPart2(part2),
- fSwapedPair(0x0),
- fQSideCMSLC(0.0),
- fQSideCMSLCNotCalc(kTRUE),
- fQOutCMSLC(0.0),
- fQOutCMSLCNotCalc(kTRUE),
- fQLongCMSLC(0.0),
- fQLongCMSLCNotCalc(kTRUE),
- fQInv(0.0),
- fQInvNotCalc(kTRUE),
- fInvMass(0.0),
- fInvMassNotCalc(kTRUE),
- fKt(0.0),
- fKtNotCalc(kTRUE),
- fKStar(0.0),
- fKStarNotCalc(kTRUE),
- fPInv(0.0),
- fQSide(0.0),
- fOut(0.0),
- fQLong(0.0),
- fMt(0.0),
- fMtNotCalc(kTRUE),
- fInvMassSqr(0.0),
- fMassSqrNotCalc(kTRUE),
- fQInvL(0.0),
- fQInvLNotCalc(kTRUE),
+AliHBTPair::AliHBTPair(AliVAODParticle* part1, AliVAODParticle* part2, Bool_t rev):
+ AliAODPair(part1,part2,rev),
fWeight(0.0),
- fWeightNotCalc(kTRUE),
- fPxSum(0.0),
- fPySum(0.0),
- fPzSum(0.0),
- fESum(0.0),
- fSumsNotCalc(kTRUE),
- fPxDiff(0.0),
- fPyDiff(0.0),
- fPzDiff(0.0),
- fEDiff(0.0),
- fDiffsNotCalc(kTRUE),
- fGammaCMSLC(0.0),
- fGammaCMSLCNotCalc(kTRUE),
- fChanged(kTRUE)
+ fWeightNotCalc(kTRUE)
{
-//value of rev defines if it is Swaped
-//if you pass kTRUE swpaped pair will NOT be created
-//though you wont be able to get the swaped pair from this pair
-
- if(!rev) fSwapedPair = new AliHBTPair(part2,part1,kTRUE); //if false create swaped pair
+//constructor
}
/************************************************************************/
-
-Double_t AliHBTPair::GetInvMass()
-{
-//Returns qinv value for a pair
- if(fInvMassNotCalc)
- {
- CalculateInvMassSqr(); //method is inline so we not waste th time for jumping into method
-
- if(fInvMassSqr<0) fInvMass = TMath::Sqrt(-fInvMassSqr);
- else fInvMass = TMath::Sqrt(fInvMassSqr);
-
- fInvMassNotCalc = kFALSE;
- }
- return fInvMass;
-}
-/************************************************************************/
-Double_t AliHBTPair::GetQSideCMSLC()
-{
- //return Q Side in Central Of Mass System in Longitudialy Comoving Frame
-
- if (fQSideCMSLCNotCalc)
- {
- fQSideCMSLC = (fPart1->Px()*fPart2->Py()-fPart2->Px()*fPart1->Py())/GetKt();
- fQSideCMSLCNotCalc = kFALSE;
- }
- return fQSideCMSLC;
-}
-/************************************************************************/
-Double_t AliHBTPair::GetQOutCMSLC()
-{
- //caculates Qout in Center Of Mass Longitudionally Co-Moving
- if(fQOutCMSLCNotCalc)
- {
- CalculateSums();
- CalculateDiffs();
-
- if (fPart1->GetMass() != fPart2->GetMass())
- {
-/*
- //STAR algorithm
- Double_t beta = fPzSum/fESum;
- Double_t gamma = GetGammaToCMSLC();
- Double_t el = gamma * (fPart1->Energy() - beta * fPart1->Pz());
- Double_t x = ( fPart1->Px()*fPxSum + fPart1->Py()*fPySum) / ( 2.0*GetKt() );
- beta = 2.0*GetKt()/GetMt();
- gamma = GetMt()/GetQInv();
- fQOutCMSLC = gamma * (x - beta * el);
-*/
-
- //beta=fPzSum/fESum; // Longit. V == beta
- Double_t beta=fPzSum/fESum;
- Double_t gamma = GetGammaToCMSLC();
-
- Double_t cosphi=fPxSum/(2.0*GetKt()); // cos(phi)
- Double_t sinphi=fPySum/(2.0*GetKt()); // sin(phi)
-
-// ROTATE(part1Px,part1Py,SPHI,CPHI,part1Px,part1Py);//ROT8
-// ROTATE(part2Px,part2Py,SPHI,CPHI,part2Px,part2Py);//ROT8
- Double_t tmp;
- tmp = fPart1->Px()*cosphi + fPart1->Py()*sinphi;
- Double_t part1Py = fPart1->Py()*cosphi - fPart1->Px()*sinphi;
- Double_t part1Px = tmp;
-
- tmp = fPart2->Px()*cosphi + fPart2->Py()*sinphi;
- Double_t part2Py = fPart2->Py()*cosphi - fPart2->Px()*sinphi;
- Double_t part2Px = tmp;
-
-
-// LTR(part1Pz,E1,beta,GetGammaToCMSLC(),part1Pz,E1a);
-// LTR(part2Pz,E2,beta,GetGammaToCMSLC(),part2Pz,E2a);
- Double_t part1Pz=gamma*(fPart1->Pz()-beta*fPart1->Energy());
- Double_t part2Pz=gamma*(fPart2->Pz()-beta*fPart2->Energy());
-
- Double_t part1P2=part1Px*part1Px+part1Py*part1Py+part1Pz*part1Pz;
- Double_t part2P2=part2Px*part2Px+part2Py*part2Py+part2Pz*part2Pz;
- Double_t part1E=TMath::Sqrt(fPart1->GetMass()*fPart1->GetMass()+part1P2);
- Double_t part2E=TMath::Sqrt(fPart2->GetMass()*fPart2->GetMass()+part2P2);
- Double_t sumE=part1E+part2E;
- Double_t sumPx=part1Px+part2Px;
- Double_t sumPy=part1Py+part2Py;
- Double_t sumPZ=part1Pz+part2Pz;
- Double_t sumP2=sumPx*sumPx+sumPy*sumPy+sumPZ*sumPZ;
-
- Double_t relmass=TMath::Sqrt(sumE*sumE-sumP2);
- Double_t hf = (fPart1->GetMass()*fPart1->GetMass() - fPart2->GetMass()*fPart2->GetMass())/(relmass*relmass);
- fQOutCMSLC=(part1Px-part2Px);//== id
- fQOutCMSLC=fQOutCMSLC-sumPx*hf; //sumPx == fPxSum ale po rotacji i transf
- }
- else
- {
- Double_t k2 = fPxSum*fPxDiff+fPySum*fPyDiff;
- fQOutCMSLC = 0.5*k2/GetKt();
- // if (non-id) fQOutCMSLC=fQOutCMSLC - sumPx*HF;
- }
-
-
- fQOutCMSLCNotCalc = kFALSE;
- }
- return fQOutCMSLC;
-}
-/************************************************************************/
-Double_t AliHBTPair::GetQLongCMSLC()
-{
- //return Q Long in Central Of Mass System in Longitudialy Comoving Frame
- if (fQLongCMSLCNotCalc)
- {
- CalculateSums();
- CalculateDiffs();
- Double_t beta = fPzSum/fESum;
- fQLongCMSLC = GetGammaToCMSLC() * ( fPzDiff - beta*fEDiff );
- fQLongCMSLCNotCalc = kFALSE;
- }
- return fQLongCMSLC;
-}
-/************************************************************************/
-Double_t AliHBTPair::GetKt()
-{
- //calculates the evarage momentum of the pair
- if(fKtNotCalc)
- {
- CalculateSums();
- fKt = 0.5*TMath::Hypot(fPxSum,fPySum);
- fKtNotCalc = kFALSE;
- }
- return fKt;
-}
-/************************************************************************/
-
-Double_t AliHBTPair::GetKStar()
-{
- //calculates invariant velocity difference
- if (fKStarNotCalc)
- {
- CalculateSums();
-
- Double_t Ptrans = fPxSum*fPxSum + fPySum*fPySum;
- Double_t Mtrans = fESum*fESum - fPzSum*fPzSum;
- Double_t Pinv = TMath::Sqrt(Mtrans - Ptrans);
-
- Double_t Q = (fPart1->GetMass()*fPart1->GetMass() - fPart2->GetMass()*fPart2->GetMass())/Pinv;
-
- CalculateQInvL();
-
- Q = Q*Q - fQInvL;
- if ( Q < 0)
- {
- Info("GetKStar","Q = %f",Q);
- fPart1->Print();
- fPart2->Print();
- Q = TMath::Abs(Q);
- }
-
- Q = TMath::Sqrt(Q);
- fKStar = Q/2.;
- fKStarNotCalc = kFALSE;
- }
- return fKStar;
-}
-/************************************************************************/
-
-Double_t AliHBTPair::GetQInv()
-{
-//returns Qinv
-//warning for non-id particles you want to use 2*KStar
- if(fQInvNotCalc)
- {
- CalculateQInvL();
- fQInv = TMath::Sqrt(TMath::Abs(fQInvL));
- fQInvNotCalc = kFALSE;
- }
- return fQInv;
-}
-/************************************************************************/
-
-Double_t AliHBTPair::GetGammaToCMSLC()
+AliHBTPair::AliHBTPair(const AliHBTPair& in):
+ AliAODPair(in),
+ fWeight(in.fWeight),
+ fWeightNotCalc(in.fWeightNotCalc)
{
- //calculates gamma factor of the boost to CMSLC
- if(fGammaCMSLCNotCalc)
- {
- CalculateSums();
- Double_t beta = fPzSum/fESum;
- fGammaCMSLC = 1.0/TMath::Sqrt(1.0 - beta*beta);
- fGammaCMSLCNotCalc = kFALSE;
- }
- return fGammaCMSLC;
+ //cpy constructor
}
/************************************************************************/
-Double_t AliHBTPair::GetMt()
+AliHBTPair& AliHBTPair::operator=(const AliHBTPair& in)
{
- //Calculates transverse mass of the pair
- if (fMtNotCalc)
- {
- CalculateSums();
- fMt = TMath::Sqrt(fESum*fESum - fPzSum*fPzSum);
- fMtNotCalc = kFALSE;
- }
- return fMt;
+ //Assigment operator
+ in.Copy(*this);
+ return *this;
}
/************************************************************************/
}
return fWeight;
}
+/************************************************************************/
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff