-#include "AliHBTLLWeights.h"
+/* $Id$ */
+
+//------------------------------------------------------------------
+// This class introduces the weight's calculation
+// according to the Lednicky's algorithm.
+// The detailed description of the algorithm can be found
+// in comments to fortran code:
+// fsiw.f, fsiini.f
+// Author:
+//------------------------------------------------------------------
-#include "AliHBTPair.h"
-#include "AliHBTParticle.h"
-#include <TList.h>
-#include <TRandom.h>
#include <TMath.h>
#include <TPDGCode.h>
+#include <TRandom.h>
+
+#include "AliHBTLLWeights.h"
+#include "AliHBTPair.h"
+#include "AliHBTParticle.h"
+#include "WLedCOMMONS.h"
+
/*******************************************************************/
/****** ROUTINES USED FOR COMMUNUCATION ********/
/******************** WITH FORTRAN ********************/
AliHBTLLWeights::AliHBTLLWeights()
{
-// Default Constructor
- fPID1 = 0;
- fPID2 = 0;
- SetRandomPosition();
- SetColWithResidNuclSwitch();
- SetStrongInterSwitch();
- SetQuantumStatistics();
- SetColoumb();
- SetTest();
+ // Default Constructor
+ fPID1 = 0;
+ fPID2 = 0;
+ SetRandomPosition();
+ SetColWithResidNuclSwitch();
+ SetStrongInterSwitch();
+ SetQuantumStatistics();
+ SetColoumb();
+ SetTest();
}
- AliHBTLLWeights* AliHBTLLWeights::Instance()
-{
- if (fgLLWeights) {
- return fgLLWeights;
- } else {
- fgLLWeights = new AliHBTLLWeights();
- return fgLLWeights;
- }
-}
+AliHBTLLWeights* AliHBTLLWeights::Instance()
+{
+ // Instantiates new object or returns a pointer to already exitsing one
+ if (fgLLWeights) {
+ return fgLLWeights;
+ } else {
+ fgLLWeights = new AliHBTLLWeights();
+ return fgLLWeights;
+ }
+}
Double_t AliHBTLLWeights::GetWeight(const AliHBTPair* partpair)
{
- AliHBTParticle *part1 = partpair->Particle1();
- AliHBTParticle *part2 = partpair->Particle2();
+ // Returns the weignt of the pair "partpair"
+ AliHBTParticle *part1 = partpair->Particle1();
+ AliHBTParticle *part2 = partpair->Particle2();
- if ( (part1 == 0x0) || (part2 == 0x0))
- {
+ if ( (part1 == 0x0) || (part2 == 0x0))
+ {
Error("GetWeight","Null particle pointer");
return 0.0;
- }
-
+ }
+
- Double_t part1Momentum[]={part1->Px(),part1->Py(),part1->Pz()};
- Double_t part2Momentum[]={part2->Px(),part2->Py(),part2->Pz()};
-
- if ( (part1->Px() == part2->Px()) &&
- (part1->Py() == part2->Py()) &&
- (part1->Pz() == part2->Pz()) )
+ Double_t part1Momentum[]={part1->Px(),part1->Py(),part1->Pz()};
+ Double_t part2Momentum[]={part2->Px(),part2->Py(),part2->Pz()};
+
+ if ( (part1->Px() == part2->Px()) &&
+ (part1->Py() == part2->Py()) &&
+ (part1->Pz() == part2->Pz()) )
{
- return 0.0;
+ return 0.0;
}
-
+
- if ((!fRandomPosition) &&
- (part1->Vx() == part2->Vx()) && (part1->Vy() == part2->Vy())
- && (part1->Vz() == part2->Vz()) )
+ if ((!fRandomPosition) &&
+ (part1->Vx() == part2->Vx()) && (part1->Vy() == part2->Vy())
+ && (part1->Vz() == part2->Vz()) )
{
- return 0.0;
+ return 0.0;
}
+
+
+
+ FSI_MOM.P1X=part1Momentum[0];
+ FSI_MOM.P1Y=part1Momentum[1];
+ FSI_MOM.P1Z=part1Momentum[2];
+
+ FSI_MOM.P2X=part2Momentum[0];
+ FSI_MOM.P2Y=part2Momentum[1];
+ FSI_MOM.P2Z=part2Momentum[2];
+
+ if (fRandomPosition){
+
+ Double_t rxcm = fsigma*gRandom->Gaus();
+ Double_t rycm = fsigma*gRandom->Gaus();
+ Double_t rzcm = fsigma*gRandom->Gaus();
+
+ FSI_PRF.X=rxcm*fwcons;
+ FSI_PRF.Y=rycm*fwcons;
+ FSI_PRF.Z=rzcm*fwcons;
+ FSI_PRF.T=0.;
+
+ Double_t rps=rxcm*rxcm+rycm*rycm+rzcm*rzcm;
+ Double_t rp=TMath::Sqrt(rps);
+ FSI_PRF.RP=rp;
+ FSI_PRF.RPS=rps;
+
+ }
+
+ ltran12();
+ fsiw();
+ if(flambda<1){
+ if(gRandom->Rndm()<(1-flambda))LEDWEIGHT.WEIN=1.;}
+
+ return LEDWEIGHT.WEIN;
+}
-
- FSI_MOM.P1X=part1Momentum[0];
- FSI_MOM.P1Y=part1Momentum[1];
- FSI_MOM.P1Z=part1Momentum[2];
-
- FSI_MOM.P2X=part2Momentum[0];
- FSI_MOM.P2Y=part2Momentum[1];
- FSI_MOM.P2Z=part2Momentum[2];
-
- if (fRandomPosition){
-
- Double_t rxcm = fsigma*gRandom->Gaus();
- Double_t rycm = fsigma*gRandom->Gaus();
- Double_t rzcm = fsigma*gRandom->Gaus();
-
- FSI_PRF.X=rxcm*fwcons;
- FSI_PRF.Y=rycm*fwcons;
- FSI_PRF.Z=rzcm*fwcons;
- FSI_PRF.T=0.;
-
- Double_t rps=rxcm*rxcm+rycm*rycm+rzcm*rzcm;
- Double_t rp=TMath::Sqrt(rps);
- FSI_PRF.RP=rp;
- FSI_PRF.RPS=rps;
-
- }
-
- ltran12();
- fsiw();
-
- if(flambda<1){
- if(gRandom->Rndm()<(1-flambda))LEDWEIGHT.WEIN=1.;}
-
- return LEDWEIGHT.WEIN;
-
- }
-
/************************************************************/
void AliHBTLLWeights::Init()
- {
-//---------------------------------------------------------------------
-
-//initial parameters of model
-
- FSI_NS.NS = approximationModel;
-
- if(!ftest){LEDWEIGHT.ITEST=0;}
-
- if(ftest){
- LEDWEIGHT.ITEST=1;
- if(fColoumbSwitch){FSI_NS.ICH =1;}
- else{FSI_NS.ICH=0;}
- if(fStrongInterSwitch){FSI_NS.ISI=1;}
- else{FSI_NS.ISI=0;}
- if(fQuantStatSwitch){FSI_NS.IQS=1;}
- else{FSI_NS.IQS=0;}
- if(fColWithResidNuclSwitch){FSI_NS.I3C=1;}
- else{FSI_NS.I3C=0;}
- }
-
- if(fRandomPosition){LEDWEIGHT.IRANPOS=1;}
- else{LEDWEIGHT.IRANPOS=0;}
-
-
- if ( (fPID1 == 0) || (fPID2 == 0) )
- {
- Fatal("Init","Particles types are not set");
- return;//pro forma
- }
-
- FSI_NS.LL = GetPairCode(fPID1,fPID2);
-
- if (FSI_NS.LL == 0)
- {
- Fatal("Init","Particles types are not supported");
- return;//pro forma
- }
-
-
- TParticlePDG* tpart1 = TDatabasePDG::Instance()->GetParticle(fPID1);
- if (tpart1 == 0x0)
- {
- Fatal("init","We can not find particle with ID=%d in our DataBase",fPID1);
- return;
- }
-
- FSI_POC.AM1=tpart1->Mass();
- FSI_POC.C1=tpart1->Charge();
-
- TParticlePDG* tpart2 = TDatabasePDG::Instance()->GetParticle(fPID2);
-//mlv
-
-
-
- if (tpart2 == 0x0)
- {
- Fatal("init","We can not find particle with ID=%d in our DataBase",fPID2);
- return;
- }
-
- FSI_POC.AM2=tpart2->Mass();
- FSI_POC.C1=tpart2->Charge();
-
- led_bldata();
- fsiini();
-
-
-//constants for radii simulation
-
- if(fRandomPosition){
- fsigma =TMath::Sqrt(2.)*fRadius;
- fwcons =FSI_CONS.W;
- }
+{
+ //---------------------------------------------------------------------
+ //initial parameters of model
+
+ FSI_NS.NS = fApproximationModel;
+
+ if(!ftest){LEDWEIGHT.ITEST=0;}
+
+ if(ftest){
+ LEDWEIGHT.ITEST=1;
+ if(fColoumbSwitch){FSI_NS.ICH =1;}
+ else{FSI_NS.ICH=0;}
+ if(fStrongInterSwitch){FSI_NS.ISI=1;}
+ else{FSI_NS.ISI=0;}
+ if(fQuantStatSwitch){FSI_NS.IQS=1;}
+ else{FSI_NS.IQS=0;}
+ if(fColWithResidNuclSwitch){FSI_NS.I3C=1;}
+ else{FSI_NS.I3C=0;}
+ }
+
+ if(fRandomPosition){LEDWEIGHT.IRANPOS=1;}
+ else{LEDWEIGHT.IRANPOS=0;}
+
+
+ if ( (fPID1 == 0) || (fPID2 == 0) )
+ {
+ Fatal("Init","Particles types are not set");
+ return;//pro forma
+ }
+
+ FSI_NS.LL = GetPairCode(fPID1,fPID2);
+
+ if (FSI_NS.LL == 0)
+ {
+ Fatal("Init","Particles types are not supported");
+ return;//pro forma
+ }
+
+
+ TParticlePDG* tpart1 = TDatabasePDG::Instance()->GetParticle(fPID1);
+ if (tpart1 == 0x0)
+ {
+ Fatal("init","We can not find particle with ID=%d in our DataBase",fPID1);
+ return;
+ }
+
+ FSI_POC.AM1=tpart1->Mass();
+ FSI_POC.C1=tpart1->Charge();
+
+ TParticlePDG* tpart2 = TDatabasePDG::Instance()->GetParticle(fPID2);
+ //mlv
+
+
+
+ if (tpart2 == 0x0)
+ {
+ Fatal("init","We can not find particle with ID=%d in our DataBase",fPID2);
+ return;
+ }
+
+ FSI_POC.AM2=tpart2->Mass();
+ FSI_POC.C1=tpart2->Charge();
+
+ led_bldata();
+ fsiini();
+
+
+ //constants for radii simulation
+
+ if(fRandomPosition){
+ fsigma =TMath::Sqrt(2.)*fRadius;
+ fwcons =FSI_CONS.W;
+ }
}
Int_t AliHBTLLWeights::GetPairCode(const AliHBTPair* partpair)
{
- return GetPairCode(partpair->Particle1()->GetPdgCode(),partpair->Particle2()->GetPdgCode());
+ // Return the code of the pair "partpair"
+ return GetPairCode(partpair->Particle1()->GetPdgCode(),partpair->Particle2()->GetPdgCode());
}
Int_t AliHBTLLWeights::GetPairCode(Int_t pid1,Int_t pid2)
{
-// pairCode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
-// hpid: n p n alfa pi+ pi0 pi+ n p pi+ pi+ pi+ pi- K+ K+ K+ K- d d t t K0 K0 d p p p n
-// lpid: n p p alfa pi- pi0 pi+ d d K- K+ p p K- K+ p p d alfa t alfa K0 K0b t t alfa lambda lambda
-// NS=1 y/n: + + + + + - - - - - - - - - - - - - - - - - - - - - - -
-
-//alphas, deuterons and tyts are NOT supported here
-
+ // pairCode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
+ // hpid: n p n alfa pi+ pi0 pi+ n p pi+ pi+ pi+ pi- K+ K+ K+ K- d d t t K0 K0 d p p p n
+ // lpid: n p p alfa pi- pi0 pi+ d d K- K+ p p K- K+ p p d alfa t alfa K0 K0b t t alfa lambda lambda
+ // NS=1 y/n: + + + + + - - - - - - - - - - - - - - - - - - - - - - -
+
+ //alphas, deuterons and tyts are NOT supported here
+
Int_t chargefactor = 1;
Int_t hpid; //pid in higher row
Int_t lpid; //pid in lower row
Bool_t swap;
-//determine the order of selcetion in switch
+ //determine the order of selcetion in switch
if (TMath::Abs(pid1) < TMath::Abs(pid2) )
- {
- if (pid1<0) chargefactor=-1;
- hpid=pid2*chargefactor;
- lpid=pid1*chargefactor;
- swap = kFALSE;
- }
+ {
+ if (pid1<0) chargefactor=-1;
+ hpid=pid2*chargefactor;
+ lpid=pid1*chargefactor;
+ swap = kFALSE;
+ }
else
- {
- if (pid2<0) chargefactor=-1;
- hpid=pid1*chargefactor;
- lpid=pid2*chargefactor;
- swap = kTRUE;
- }
-
-//mlv
- hpid=pid1;
- lpid=pid2;
-
-
-//Determine the pair code
+ {
+ if (pid2<0) chargefactor=-1;
+ hpid=pid1*chargefactor;
+ lpid=pid2*chargefactor;
+ swap = kTRUE;
+ }
+
+ //mlv
+ hpid=pid1;
+ lpid=pid2;
+
+
+ //Determine the pair code
switch (hpid) //switch on first particle id
- {
- case kNeutron:
+ {
+ case kNeutron:
switch (lpid)
- {
- case kNeutron:
- code = 1; //neutron neutron
- break;
-
- case kProton:
- code = 3; //neutron proton
- break;
-
- case kLambda0:
- code = 28; //neutron lambda
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kNeutron:
+ code = 1; //neutron neutron
+ break;
+
+ case kProton:
+ code = 3; //neutron proton
+ break;
+
+ case kLambda0:
+ code = 28; //neutron lambda
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
-
- case kProton:
+
+ case kProton:
switch (lpid)
- {
- case kProton:
- code = 2; //proton proton
- break;
-
- case kLambda0:
- code = 27;//proton lambda
- break;
-
- default:
- return 0; //given pair not supported
- break;
-
- }
+ {
+ case kProton:
+ code = 2; //proton proton
+ break;
+
+ case kLambda0:
+ code = 27;//proton lambda
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+
+ }
break;
-
- case kPiPlus:
-
+
+ case kPiPlus:
+
switch (lpid)
- {
- case kPiPlus:
- code = 7; //piplus piplus
- break;
-
- case kPiMinus:
- code = 5; //piplus piminus
- break;
-
- case kKMinus:
- code = 10; //piplus Kminus
- break;
-
- case kKPlus:
- code = 11; //piplus Kplus
- break;
-
- case kProton:
- code = 12; //piplus proton
- chargefactor*=-1;
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kPiPlus:
+ code = 7; //piplus piplus
+ break;
+
+ case kPiMinus:
+ code = 5; //piplus piminus
+ break;
+
+ case kKMinus:
+ code = 10; //piplus Kminus
+ break;
+
+ case kKPlus:
+ code = 11; //piplus Kplus
+ break;
+
+ case kProton:
+ code = 12; //piplus proton
+ chargefactor*=-1;
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
- case kPi0:
+ case kPi0:
switch (lpid)
- {
- case kPi0:
- code = 6;
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kPi0:
+ code = 6;
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
- case kKPlus:
+ case kKPlus:
switch (lpid)
- {
- case kKMinus:
- code = 14; //Kplus Kminus
- break;
-
- case kKPlus:
- code = 15; //Kplus Kplus
- break;
-
- case kProton:
- code = 16; //Kplus proton
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kKMinus:
+ code = 14; //Kplus Kminus
+ break;
+
+ case kKPlus:
+ code = 15; //Kplus Kplus
+ break;
+
+ case kProton:
+ code = 16; //Kplus proton
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
- case kKMinus:
+ case kKMinus:
switch (lpid)
- {
- case kProton:
- code = 17; //Kminus proton
- chargefactor*=1;
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kProton:
+ code = 17; //Kminus proton
+ chargefactor*=1;
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
- case kK0:
+ case kK0:
switch (lpid)
- {
- case kK0:
- code = 2; //Kzero Kzero
- break;
-
- case kK0Bar:
- code = 17; //Kzero KzeroBar
- break;
-
- default:
- return 0; //given pair not supported
- break;
- }
+ {
+ case kK0:
+ code = 2; //Kzero Kzero
+ break;
+
+ case kK0Bar:
+ code = 17; //Kzero KzeroBar
+ break;
+
+ default:
+ return 0; //given pair not supported
+ break;
+ }
break;
-
- default: return 0;
- }
+
+ default: return 0;
+ }
return code;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff