/[PAMELA software]/PamCut/TrkCuts/TrkChi2DeflTimeCut/TrkChi2DeflTimeCut.h
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Diff of /PamCut/TrkCuts/TrkChi2DeflTimeCut/TrkChi2DeflTimeCut.h

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revision 1.1 by pam-fi, Fri Oct 23 15:34:31 2009 UTC revision 1.4 by pam-fi, Fri May 27 14:01:39 2011 UTC
# Line 15  Line 15 
15  #include <TH2F.h>  #include <TH2F.h>
16  #include <TTimeStamp.h>  #include <TTimeStamp.h>
17    
18  /*! @brief The tracker chi2 vs deflection cut.  /*! @brief The tracker chi2 vs |deflection| cut.
19   *   *
20   * Events whose track has been fitted with a chi2 greater than Chi2(eta) are discarded.   * Events whose track has been fitted with a chi2 greater than Chi2(|eta|) are discarded.
21   * Chi2(eta) is a function which gives the maximum value of chi2 associated to a certain   * Chi2(|eta|) is a function which gives the value of chi2 distribution, corresponding to a given quantile (depending on the calibration text file), as a function of |deflection| (|eta|); in current implementation it is parameterized as:
  * deflection eta; in current implementation it is parameterized as:  
22   *   *
23   *   Chi2(eta) = p0 + p1 * eta^2 + p2 * eta ^4   *   4 parameters p0...p3:
24   *   *
25   * where p0, p1 and p2 are parameters. These are read from a file, and are supposed to be   *   Chi2(|eta|) = p0 + ( p1 * |eta|^p2 * (1 + (p3 * |eta|)^2) )
26   * computed month by month.   *   with eta expressed in GV^-1
27     *
28     *   5 parameters p0..p4
29     *
30     *   Chi2(|eta|) = p0 + ( p1 * |eta|^p2 * (1 + (p3 * |eta|)^p4) )
31     *   with eta expressed in GV^-1
32     *
33     * The parameters are read from a calibration text file (prepared for a given quantile, e.g. 95%), whose format must be:
34     * ...
35     * first_day    last_day        p0      p1      p2      ...
36     * with first_day and last_day expressed in the format YYMMDD
37     * ...
38     * where each row corresponds to a given time interval (first_day,last_day)
39     *
40     * For a given event the associated day is determined; the FIRST (starting from first row) time interval of the calibration file, which contains the event day, gives the parameters to be inserted in the Chi2(|eta|) for the given event.
41     * If the event day does not fall in any of the intervals of the calibration file, then the event is discarded.
42   *   *
43   */   */
44    
# Line 34  public: Line 48  public:
48    /*! @brief Constructor.    /*! @brief Constructor.
49     *     *
50     * @param cutName The cut's name.     * @param cutName The cut's name.
51     * @param calibFile Path for the calibration file. The format of the file's rows is:     * @param calibFile Path for the calibration text file.
52     *                  YYMM efficiency p0 p1 p2     * @param nPar Number of parameters used for the Chi2 function. Maximum allowed: 5. Default: 4.
53     */     */
54    TrkChi2DeflTimeCut(const char *cutName, const char *calibFile) :    TrkChi2DeflTimeCut(const char *cutName, const char *calibFile, int nPar=4) :
55      PamCut(cutName), _calibFile(calibFile) {      PamCut(cutName), _calibFile(calibFile), _nPar(nPar) {
56    
57      _chi2CutTable.open(_calibFile);      _chi2CutTable.open(_calibFile);
58      while (! _chi2CutTable.eof()) {      while (! _chi2CutTable.eof()) {
59            
60        _chi2CutTable >> _tstringtemp;        _chi2CutTable >> _tstringtemp;
61        _iMonth.push_back(_tstringtemp.Atoi());        _iDayFirst.push_back(_tstringtemp.Atoi());
         
       _chi2CutTable >> _tstringtemp;  
         
       _chi2CutTable >> _tstringtemp;  
       _p0.push_back(_tstringtemp.Atof());  
         
       _chi2CutTable >> _tstringtemp;  
       _p1.push_back(_tstringtemp.Atof());  
62    
63        _chi2CutTable >> _tstringtemp;        _chi2CutTable >> _tstringtemp;
64        _p2.push_back(_tstringtemp.Atof());              _iDayLast.push_back(_tstringtemp.Atoi());
65          
66          if (_nPar>=0 && _nPar<=5) {
67            for (int iPar=0; iPar<_nPar; iPar++) {
68                
69              _chi2CutTable >> _tstringtemp;
70              _p[iPar].push_back(_tstringtemp.Atof());
71            
72            }
73          }
74                
75      }      }
76      _chi2CutTable.close();      _chi2CutTable.close();
77    
 #ifdef DEBUGPAMCUT  
   
     TString hId;  
     TString hTitle;  
   
     for (UInt_t j = 0; j < 2; j++) {  
       hId.Form("h_trk_chi2_vs_defl_%i_", j);  
       hId.Append(TString(cutName));  
       hTitle.Form("TRK chi2 vs defl (%i)", j);  
       h_trk_chi2_defl[j] = new TH2F(hId.Data(), hTitle.Data(), 50, 0, 2.5, 50, 0, 20);  
     }  
   
 #endif  
   
78    }    }
79    
80    /*! @brief Destructor. */    /*! @brief Destructor. */
81    ~TrkChi2DeflTimeCut() {    ~TrkChi2DeflTimeCut() {
82    
 #ifdef DEBUGPAMCUT  
   
     for (UInt_t j = 0; j < 2; j++) {  
       h_trk_chi2_defl[j]->Write();  
     }  
   
 #endif  
   
83    }    }
84    
85    /*! @brief The tracker chi2 vs deflection check.    /*! @brief The tracker chi2 vs |deflection| check.
86     *     *
87     *     *
88     * @param event The event to analyze.     * @param event The event to analyze.
89     * @return #CUTOK if chi2 < Chi2(eta).     * @return #CUTOK if chi2 < Chi2(|eta|).
90     * @return 0 if not     * @return 0 if not
91     */     */
92    int Check(PamLevel2 *event);    int Check(PamLevel2 *event);
93    
94  private:  private:
95    
96  #ifdef DEBUGPAMCUT      virtual double _GetChi2(PamLevel2 *event);
   
   TH2F* h_trk_chi2_defl[2];  
   
 #endif  
97    
98      const char* _calibFile;      const char* _calibFile;
99        int _nPar;
100    
101      TString _tstringtemp;      TString _tstringtemp;
102            
103      std::vector<Int_t> _iMonth;      std::vector<Int_t> _iDayFirst;
104      std::vector<Double_t> _p0;      std::vector<Int_t> _iDayLast;
105      std::vector<Double_t> _p1;      std::vector<Double_t> _p[5];
     std::vector<Double_t> _p2;  
106    
107      ifstream _chi2CutTable;      ifstream _chi2CutTable;
108            
109      Double_t _p0sel, _p1sel, _p2sel;      Double_t _pSel[5];
110            
111      TTimeStamp _time;      TTimeStamp _time;
112    
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