+++ /dev/null
-////////////////////////////////////////////////////////////////////////////////
-/// ///
-/// AliFemtoModelWeightGeneratorBasic - basic femtoscopic weight generator ///
-/// only return a simple ///
-/// Authors: Adam Kisiel kisiel@mps.ohio-state.edu ///
-/// ///
-////////////////////////////////////////////////////////////////////////////////
-#ifdef __ROOT__
- ClassImp(AliFemtoModelWeightGeneratorBasic, 1)
-#endif
-
-#include "AliFemtoModelWeightGeneratorBasic.h"
-#include "AliFemtoModelHiddenInfo.h"
-
-//________________________
-AliFemtoModelWeightGeneratorBasic::AliFemtoModelWeightGeneratorBasic():
- AliFemtoModelWeightGenerator()
-{
- /* no-op */
-}
-//________________________
-AliFemtoModelWeightGeneratorBasic::AliFemtoModelWeightGeneratorBasic(const AliFemtoModelWeightGeneratorBasic &aModel) :
- AliFemtoModelWeightGenerator(aModel)
-{
- /* no-op */
-}
-
-//________________________
-AliFemtoModelWeightGeneratorBasic::~AliFemtoModelWeightGeneratorBasic()
-{
- /* no-op */
-}
-
-AliFemtoModelWeightGeneratorBasic& AliFemtoModelWeightGeneratorBasic::operator=(const AliFemtoModelWeightGeneratorBasic &aModel)
-{
- if (this != &aModel) {
- AliFemtoModelWeightGenerator::operator=(aModel);
- }
-
- return *this;
-}
-
-//________________________
-Double_t AliFemtoModelWeightGeneratorBasic::GenerateWeight(AliFemtoPair *aPair)
-{
- // Generate a simple femtoscopic weight coming only from
- // quantum statistics - symmetrization or anti-symmetrization
- // of the pair wave function
-
- // Get hidden information pointers
- //AliFemtoModelHiddenInfo *inf1 = (AliFemtoModelHiddenInfo *) aPair->Track1()->HiddenInfo();
- //AliFemtoModelHiddenInfo *inf2 = (AliFemtoModelHiddenInfo *) aPair->Track2()->HiddenInfo();
- AliFemtoTrack *inf1 = (AliFemtoTrack *) aPair->Track1()->Track();
- AliFemtoTrack *inf2 = (AliFemtoTrack *) aPair->Track2()->Track();
-
- // Calculate pair variables
- Double_t tPx = inf1->GetTrueMomentum()->x()+inf2->GetTrueMomentum()->x();
- Double_t tPy = inf1->GetTrueMomentum()->y()+inf2->GetTrueMomentum()->y();
- Double_t tPz = inf1->GetTrueMomentum()->z()+inf2->GetTrueMomentum()->z();
- // double tE = inf1->GetTrueMomentum()->e +inf2->GetTrueMomentum()->.e;
- Double_t tM1 = inf1->GetMass();
- Double_t tM2 = inf2->GetMass();
- Double_t tE1 = sqrt(tM1*tM1 + inf1->GetTrueMomentum()->Mag2());
- Double_t tE2 = sqrt(tM2*tM2 + inf2->GetTrueMomentum()->Mag2());
- Double_t tE = tE1 + tE2;
- Double_t tPt = tPx*tPx + tPy*tPy;
- Double_t tMt = tE*tE - tPz*tPz;//mCVK;
- Double_t tM = sqrt(tMt - tPt);
- tMt = sqrt(tMt);
- tPt = sqrt(tPt);
- Double_t tBetat = tPt/tMt;
-
- // Boost to LCMS
- Double_t tBeta = tPz/tE;
- Double_t tGamma = tE/tMt;
- fKStarLong = tGamma * (inf1->GetTrueMomentum()->z() - tBeta * tE1);
- Double_t tE1L = tGamma * (tE1 - tBeta * inf1->GetTrueMomentum()->z());
-
- // Transform positions to LCMS
-// Double_t tP1zl = tGamma * (inf1->GetEmissionPoint()->z() - tBeta * inf1->GetEmissionPoint()->t());
-// Double_t tP1tl = tGamma * (inf1->GetEmissionPoint()->t() - tBeta * inf1->GetEmissionPoint()->z());
-
-// Double_t tP2zl = tGamma * (inf2->GetEmissionPoint()->z() - tBeta * inf2->GetEmissionPoint()->t());
-// Double_t tP2tl = tGamma * (inf2->GetEmissionPoint()->t() - tBeta * inf2->GetEmissionPoint()->z());
-
-// Double_t tP1pzl = tGamma * (inf1->GetTrueMomentum()->z() - tBeta * tE1);
-// Double_t tP1el = tGamma * (tE1 - tBeta * inf1->GetTrueMomentum()->z());
-
-// Double_t tP2pzl = tGamma * (inf2->GetTrueMomentum()->z() - tBeta * tE2);
-// Double_t tP2el = tGamma * (tE2 - tBeta * inf2->GetTrueMomentum()->z());
-
- // Rotate in transverse plane
- fKStarOut = ( inf1->GetTrueMomentum()->x()*tPx + inf1->GetTrueMomentum()->y()*tPy)/tPt;
- fKStarSide = (-inf1->GetTrueMomentum()->x()*tPy + inf1->GetTrueMomentum()->y()*tPx)/tPt;
-
-// Double_t tP1pxl = fKStarOut;
-// Double_t tP1pyl = fKStarSide;
-
-// Double_t tP2pxl = (inf2->GetTrueMomentum()->x()*tPx + inf2->GetTrueMomentum()->y()*tPy)/tPt;
-// Double_t tP2pyl = (inf2->GetTrueMomentum()->y()*tPx - inf2->GetTrueMomentum()->x()*tPy)/tPt;;
-
-// Double_t tKO = tP1pxl - tP2pxl;
-// Double_t tKS = tP1pyl - tP2pyl;
-// Double_t tKL = tP1pzl - tP2pzl;
-// Double_t tDE = tP1el - tP2el;
-
- // save the rotated coordinates in LCMS variables
-// Double_t tP1xl = ( inf1->GetEmissionPoint()->x()*tPx + inf1->GetEmissionPoint()->y()*tPy)/tPt;
-// Double_t tP1yl = (-inf1->GetEmissionPoint()->x()*tPy + inf1->GetEmissionPoint()->y()*tPx)/tPt;
-
-// Double_t tP2xl = ( inf2->GetEmissionPoint()->x()*tPx + inf2->GetEmissionPoint()->y()*tPy)/tPt;
-// Double_t tP2yl = (-inf2->GetEmissionPoint()->x()*tPy + inf2->GetEmissionPoint()->y()*tPx)/tPt;
-
- // Boost to pair cms
- fKStarOut = tMt/tM * (fKStarOut - tPt/tMt * tE1L);
-
- tBetat = tPt/tMt;
-// Double_t tGammat = 1.0/sqrt(1.0-tBetat*tBetat);
-
-// Double_t tP1xp = tGammat*(tP1xl - tBetat*tP1tl);
-// Double_t tP1tp = tGammat*(tP1tl - tBetat*tP1xl);
-
-// Double_t tP2xp = tGammat*(tP2xl - tBetat*tP2tl);
-// Double_t tP2tp = tGammat*(tP2tl - tBetat*tP2xl);
-
-// Double_t tRO = (tP1xl - tP2xl)/0.197327;
-// Double_t tRS = (tP1yl - tP2yl)/0.197327;
-// Double_t tRL = (tP1zl - tP2zl)/0.197327;
-// Double_t tDT = (tP1tl - tP2tl)/0.197327;
-
- Double_t tDX = inf1->GetEmissionPoint()->x()-inf2->GetEmissionPoint()->x();
- Double_t tDY = inf1->GetEmissionPoint()->y()-inf2->GetEmissionPoint()->y();
- Double_t tRLong = inf1->GetEmissionPoint()->z()-inf2->GetEmissionPoint()->z();
- Double_t tDTime = inf1->GetEmissionPoint()->t()-inf2->GetEmissionPoint()->t();
-
- Double_t tROut = (tDX*tPx + tDY*tPy)/tPt;
- Double_t tRSide = (-tDX*tPy + tDY*tPx)/tPt;
-
- fRStarSide = tRSide;
- Double_t tRSS = fRStarSide/0.197327;
-
- fRStarLong = tGamma*(tRLong - tBeta* tDTime);
- Double_t tDTimePairLCMS = tGamma*(tDTime - tBeta* tRLong);
-
- Double_t tRLS = fRStarLong/0.197327;
- tBeta = tPt/tMt;
- tGamma = tMt/tM;
-
- fRStarOut = tGamma*(tROut - tBeta* tDTimePairLCMS);
- Double_t tROS = fRStarOut/0.197327;
-// Double_t tDTimePairCMS = tGamma*(tDTimePairLCMS - tBeta* tROut);
- fRStar = ::sqrt(fRStarOut*fRStarOut + fRStarSide*fRStarSide +
- fRStarLong*fRStarLong);
- fKStar = ::sqrt(fKStarOut*fKStarOut + fKStarSide*fKStarSide + fKStarLong*fKStarLong);
-// Double_t tRSt = fRStar/0.197327;
-
- if (fPairType != fgkPairTypeNone) {
- if ((fPairType == PionPlusPionPlus()) || (fPairType == KaonPlusKaonPlus()))
- return 1.0 + cos (2*(fKStarOut * tROS + fKStarSide * tRSS + fKStarLong * tRLS));
- else if (fPairType == ProtonProton())
- return 1.0 - 0.5 * cos (2*(fKStarOut * tROS + fKStarSide * tRSS + fKStarLong * tRLS));
- else
- return 1.0;
- }
- else {
- Int_t tPairType = GetPairTypeFromPair(aPair);
- if ((tPairType == PionPlusPionPlus()) || (tPairType == KaonPlusKaonPlus()))
- return 1.0 + cos (2*(fKStarOut * tROS + fKStarSide * tRSS + fKStarLong * tRLS));
- else if (tPairType == ProtonProton())
- return 1.0 - 0.5 * cos (2*(fKStarOut * tROS + fKStarSide * tRSS + fKStarLong * tRLS));
- else
- return 1.0;
-
- }
-}
-
-//________________________
-void AliFemtoModelWeightGeneratorBasic::SetPairType(Int_t aPairType)
-{
- AliFemtoModelWeightGenerator::SetPairType(aPairType);
-}
-//________________________
-void AliFemtoModelWeightGeneratorBasic::SetPairTypeFromPair(AliFemtoPair *aPair)
-{
- AliFemtoModelWeightGenerator::SetPairTypeFromPair(aPair);
-}
-//________________________
-Int_t AliFemtoModelWeightGeneratorBasic::GetPairType() const
-{
- return AliFemtoModelWeightGenerator::GetPairType();
-}
-//________________________
-AliFemtoModelWeightGenerator* AliFemtoModelWeightGeneratorBasic::Clone() const
-{
- return GetGenerator();
-}
-//________________________
-AliFemtoModelWeightGenerator* AliFemtoModelWeightGeneratorBasic::GetGenerator() const
-{
- AliFemtoModelWeightGeneratorBasic *tGen = new AliFemtoModelWeightGeneratorBasic(*this);
- return tGen;
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff