T49HbtMomentumResolutionProvider

class T49HbtMomentumResolutionProvider : public TObject

    public:

                                        T49HbtMomentumResolutionProvider(Char_t* Name)
                                        T49HbtMomentumResolutionProvider(const T49HbtMomentumResolutionProvider&)
                                        ~T49HbtMomentumResolutionProvider()
                         static TClass* Class()
                                  Int_t GetKtYIndex(Double_t lKtPair, Double_t lYPair)
                                   void GetMeanAndRMS(Double_t ktPair, Double_t YPair, Double_t qout, Double_t qside, Double_t qlong, Double_t& MeanQout, Double_t& MeanQside, Double_t& MeanQlong, Double_t& RMSQout, Double_t& RMSQside, Double_t& RMSQlong)
                        virtual TClass* IsA() const
      T49HbtMomentumResolutionProvider& operator=(const T49HbtMomentumResolutionProvider&)
                           virtual void ShowMembers(TMemberInspector& insp, char* parent)
                           virtual void Streamer(TBuffer& b)
                                   void StreamerNVirtual(TBuffer& b)

Data Members

    private:

          TFile* mResultFile  Pointer to result file written out by T49HbtMomentumResolutionCalculator class
      TObjArray* mResolution  TObjArray holding RMS and Mean TH3D's for each side-out-long bin
           TH3D* mMaster3d    Master 3d Histo to locate side-out-long bin
       Double_t* mKtBins      
       Double_t* mYBins       
           Int_t mNKtBins     
           Int_t mNYBins      
           Int_t mMaxKtY      

Class Description

 The T49HbtMomentumResolutionCalculator class is intended to produce for each qSide,qLong,qOut bin in each kt-Y bin
 the momentum resolution in qSide,qOut,qLong and a possible shift in qSide,qOut,qLong. To obtain these values 3 vectors
 for each cell are filled holding the difference between a Monte Carlo pair (MC) and the reconstructed pair (RC)
 in qSide, qOut and qLong. A gaus fit to each vector gives the RMS (=resolution) and the shift, which will is needed
 by the smear procedure in T49HbtMomentumResolutionCorrection.

 The constructor wants to know the dimension of the qside,qout,qlong 3d object and the kt-Y binning.
 The mixing macro calls the Use function, enertering lists of MC and the according RC tracks.
 The result can be stored in a file which will be accessed by T49HbtMomentumResolutionCorrection
 via T49HbtMomentumResolutionProvider

 Structure of T49HbtMomentumResolutionCalculator:

             each kt-Y cell -> ListofDisplacedMomenta[#qside * #qout * #qlong] holding TVector3s of MomDiffs
                            -> TH3D* ResolutionMeanQside (out,long)  results
                            -> TH3D* ResolutionRMSQside  (out,long)  results

 Open result file

 Kt

 Get index of this qout-qside-qlong bin

Inline Functions

                                     void ~T49HbtMomentumResolutionProvider()
                                  TClass* Class()
                                  TClass* IsA() const
                                     void ShowMembers(TMemberInspector& insp, char* parent)
                                     void Streamer(TBuffer& b)
                                     void StreamerNVirtual(TBuffer& b)
         T49HbtMomentumResolutionProvider T49HbtMomentumResolutionProvider(const T49HbtMomentumResolutionProvider&)
        T49HbtMomentumResolutionProvider& operator=(const T49HbtMomentumResolutionProvider&)