* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id: AliNeutralMesonSelection.cxx 27413 2008-07-18 13:28:12Z gconesab $ */
//_________________________________________________________________________
// Class that contains methods to select candidate pairs to neutral meson
ClassImp(AliNeutralMesonSelection)
-//____________________________________________________________________________
+//______________________________________________________
AliNeutralMesonSelection::AliNeutralMesonSelection() :
TObject(), fAsymmetryCut(1), fUseAsymmetryCut(0),
fM(0), fInvMassMaxCut(0.), fInvMassMinCut(0.), fInvMassMaxCutParam(),
InitParameters();
}
-//________________________________________________________________________
+//_________________________________________________________
TList * AliNeutralMesonSelection::GetCreateOutputObjects()
{
// Create histograms to be saved in output file and
}
-//____________________________________________________________________________
+//_____________________________________________
void AliNeutralMesonSelection::InitParameters()
{
}
-//__________________________________________________________________________-
-Bool_t AliNeutralMesonSelection::IsAngleInWindow(const Float_t angle,const Float_t e) const
+//_____________________________________________________________________
+Bool_t AliNeutralMesonSelection::IsAngleInWindow(const Float_t angle,
+ const Float_t e) const
{
// Check if the opening angle of the candidate pairs is inside
}
-//____________________________________________________________________________
-Bool_t AliNeutralMesonSelection::SelectPair(TLorentzVector gammai, TLorentzVector gammaj, TString calo)
+//_________________________________________________________________
+Bool_t AliNeutralMesonSelection::SelectPair(TLorentzVector gammai,
+ TLorentzVector gammaj,
+ TString calo)
{
//Search for the neutral pion within selection cuts
Double_t phi = (gammai+gammaj).Phi();
if(phi < 0)
phi+=TMath::TwoPi();
+
Double_t invmass = (gammai+gammaj).M();
Double_t angle = gammaj.Angle(gammai.Vect());
Double_t e = (gammai+gammaj).E();
Double_t asy = TMath::Abs((gammai-gammaj).E())/(gammai+gammaj).E();
//Fill histograms with no cuts applied.
- if(fKeepNeutralMesonHistos){
+ if(fKeepNeutralMesonHistos)
+ {
fhAnglePairNoCut ->Fill(e,angle);
fhInvMassPairNoCut->Fill(e,invmass);
fhAsymmetryNoCut ->Fill(e,asy);
}
//Cut on the aperture of the pair
- if(fUseAngleCut){
- if(IsAngleInWindow(angle,e)){
- if(fKeepNeutralMesonHistos ){
+ if(fUseAngleCut)
+ {
+ if(IsAngleInWindow(angle,e))
+ {
+ if(fKeepNeutralMesonHistos )
+ {
fhAnglePairOpeningAngleCut ->Fill(e,angle);
fhInvMassPairOpeningAngleCut->Fill(e,invmass);
fhAsymmetryOpeningAngleCut ->Fill(e,asy);
}
// Asymmetry cut
- if(fUseAsymmetryCut){
- if(fAsymmetryCut > asy){
- if(fKeepNeutralMesonHistos){
+ if(fUseAsymmetryCut)
+ {
+ if(fAsymmetryCut > asy)
+ {
+ if(fKeepNeutralMesonHistos)
+ {
fhInvMassPairAsymmetryCut->Fill(e,invmass);
fhAnglePairAsymmetryCut ->Fill(e,angle);
}
//Cut on the invariant mass of the pair
Float_t invmassmaxcut = fInvMassMaxCut;
- if(calo=="EMCAL" && e > 6.){ // for EMCAL, pi0s, mass depends strongly with energy for e > 6, loose max cut
+ if(calo=="EMCAL" && e > 6.)
+ { // for EMCAL, pi0s, mass depends strongly with energy for e > 6, loose max cut
invmassmaxcut = (fInvMassMaxCutParam[0]+fInvMassMaxCut)+fInvMassMaxCutParam[1]*e+fInvMassMaxCutParam[2]*e*e;
//printf("e %f, max cut %f, p00 %f,p0 %f,p1 %f,p2 %f\n",
// e,invmassmaxcut,fInvMassMaxCut,fInvMassMaxCutParam[0],fInvMassMaxCutParam[1],fInvMassMaxCutParam[2]);
}
- if((invmass > fInvMassMinCut) && (invmass < invmassmaxcut)){
- if(fKeepNeutralMesonHistos){
+ if( (invmass > fInvMassMinCut) && (invmass < invmassmaxcut) )
+ {
+ if(fKeepNeutralMesonHistos)
+ {
fhInvMassPairAllCut->Fill(e,invmass);
fhAnglePairAllCut ->Fill(e,angle);
fhAsymmetryAllCut ->Fill(e,asy);
return kTRUE;
}//(invmass>0.125) && (invmass<0.145)
- else return kFALSE;
+ else
+ return kFALSE;
}
-//____________________________________________________________________________
-void AliNeutralMesonSelection::SetParticle(TString particleName){
+//_______________________________________________________________
+void AliNeutralMesonSelection::SetParticle(TString particleName)
+{
// Set some default parameters for selection of pi0 or eta
- if(particleName=="Pi0"){
+ if(particleName=="Pi0")
+ {
+ fHistoNIMBins = 150 ;
+ fHistoIMMax = 0.3 ;
+ fHistoIMMin = 0. ;
- fM = 0.135 ; // GeV
- fInvMassMaxCut = 0.16 ; // GeV
- fInvMassMinCut = 0.11 ; // GeV
+ fM = 0.135 ; // GeV
+ fInvMassMaxCut = 0.16 ; // GeV
+ fInvMassMinCut = 0.11 ; // GeV
fInvMassMaxCutParam[0] = 0.0 ;
fInvMassMaxCutParam[1] =-7.e-5 ;
fInvMassMaxCutParam[2] = 8.e-5 ;
- fShiftMinAngle[0] =-0.03 ;
- fShiftMinAngle[1] = 0.0025;
+ fShiftMinAngle[0] =-0.03 ;
+ fShiftMinAngle[1] = 0.0025;
fAngleMaxParam.AddAt( 0.8, 0) ;
fAngleMaxParam.AddAt(-1, 1) ;
fAngleMaxParam.AddAt( 0.09, 2) ; //for pi0 shift, for eta maybe 0.09
fAngleMaxParam.AddAt(-2.e-3,3) ;
-
- fHistoNIMBins = 150 ;
- fHistoIMMax = 0.3 ;
- fHistoIMMin = 0. ;
-
- }else if(particleName=="Eta"){
- fM = 0.547 ; // GeV
- fInvMassMaxCut = 0.590 ; // GeV
- fInvMassMinCut = 0.510 ; // GeV
+ }
+ else if(particleName=="Eta")
+ {
+ fHistoNIMBins = 200 ; // GeV
+ fHistoIMMax = 0.75 ; // GeV
+ fHistoIMMin = 0.35 ; // GeV
+
+ fM = 0.547 ; // GeV
+ fInvMassMaxCut = 0.590 ; // GeV
+ fInvMassMinCut = 0.510 ; // GeV
fInvMassMaxCutParam[0] = 0.0 ;
fInvMassMaxCutParam[1] = 0.0 ;
fInvMassMaxCutParam[2] = 0.0 ;
- fShiftMinAngle[0] =-0.03 ;
- fShiftMinAngle[0] = 0.00 ;
+ fShiftMinAngle[0] =-0.03 ;
+ fShiftMinAngle[0] = 0.00 ;
fAngleMaxParam.AddAt( 0.80, 0) ; // Same as pi0
fAngleMaxParam.AddAt(-0.25, 1) ; // Same as pi0
fAngleMaxParam.AddAt( 0.12, 2) ; // Shifted with respect to pi0
fAngleMaxParam.AddAt(-5.e-4, 3) ; // Same as pi0
-
- fHistoNIMBins = 200 ; // GeV
- fHistoIMMax = 0.75 ; // GeV
- fHistoIMMin = 0.35 ; // GeV
}
else
}
-//__________________________________________________________________
+//______________________________________________________________
void AliNeutralMesonSelection::Print(const Option_t * opt) const
{
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff