/[PAMELA software]/PamCut/TrkCuts/TrkChi2DeflTimeCut/TrkChi2DeflTimeCut.h
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revision 1.3 by pam-fi, Fri Feb 19 15:14:37 2010 UTC revision 1.5 by pam-fi, Fri Sep 2 16:28:17 2011 UTC
# Line 18  Line 18 
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:
22   * |deflection| (|eta|); in current implementation it is parameterized as:   *
23     *   4 parameters p0...p3:
24   *   *
25   *   Chi2(|eta|) = p0 + ( p1 * |eta|^p2 * (1 + (p3 * |eta|)^2) )   *   Chi2(|eta|) = p0 + ( p1 * |eta|^p2 * (1 + (p3 * |eta|)^2) )
26   *   with eta expressed in GV^-1   *   with eta expressed in GV^-1
27   *   *
28   * where p0, p1 and p2 are parameters. These are read from a calibration text file, whose format must be:   *   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      p3   * first_day    last_day        p0      p1      p2      ...
36   * with first_day and last_day expressed in the format YYMMDD   * 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)   * where each row corresponds to a given time interval (first_day,last_day)
39   *   * The calibration text file can vary with nHitX of the event: in the current implementation, a text file must be specified for events with nHitX=3 and for events with nHitX>=4.
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.   * 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.   * If the event day does not fall in any of the intervals of the calibration file, then the event is discarded.
42   *   *
# Line 42  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 text file.     * @param calibFile_nHitX3 Path for the calibration text file, used for events with nHitX=3.
52       * @param calibFile_nHitX4 Path for the calibration text file, used for events with nHitX>=4.  
53       * @param nPar Number of parameters used for the Chi2 function. Maximum allowed: 5. Default: 5.
54     */     */
55    TrkChi2DeflTimeCut(const char *cutName, const char *calibFile) :    TrkChi2DeflTimeCut(const char *cutName, const char *calibFile_nHitX3, const char *calibFile_nHitX4, int nPar=5) :
56      PamCut(cutName), _calibFile(calibFile) {      PamCut(cutName), _calibFile_nHitX3(calibFile_nHitX3), _calibFile_nHitX4(calibFile_nHitX4), _nPar(nPar) {
57    
58      _chi2CutTable.open(_calibFile);      _chi2CutTable_nHitX3.open(_calibFile_nHitX3);
59      while (! _chi2CutTable.eof()) {      while (! _chi2CutTable_nHitX3.eof()) {
60            
61        _chi2CutTable >> _tstringtemp;        _chi2CutTable_nHitX3 >> _tstringtemp;
62        _iDayFirst.push_back(_tstringtemp.Atoi());        _iDayFirst_nHitX3.push_back(_tstringtemp.Atoi());
63    
64        _chi2CutTable >> _tstringtemp;        _chi2CutTable_nHitX3 >> _tstringtemp;
65        _iDayLast.push_back(_tstringtemp.Atoi());        _iDayLast_nHitX3.push_back(_tstringtemp.Atoi());
66                
67        _chi2CutTable >> _tstringtemp;        if (_nPar>=0 && _nPar<=5) {
68        _p0.push_back(_tstringtemp.Atof());          for (int iPar=0; iPar<_nPar; iPar++) {
69                
70        _chi2CutTable >> _tstringtemp;            _chi2CutTable_nHitX3 >> _tstringtemp;
71        _p1.push_back(_tstringtemp.Atof());            _p_nHitX3[iPar].push_back(_tstringtemp.Atof());
72            
73            }
74          }
75                
76        }
77        _chi2CutTable_nHitX3.close();
78    
79        _chi2CutTable >> _tstringtemp;      _chi2CutTable_nHitX4.open(_calibFile_nHitX4);
80        _p2.push_back(_tstringtemp.Atof());            while (! _chi2CutTable_nHitX4.eof()) {
81        
82          _chi2CutTable_nHitX4 >> _tstringtemp;
83          _iDayFirst_nHitX4.push_back(_tstringtemp.Atoi());
84    
85        _chi2CutTable >> _tstringtemp;        _chi2CutTable_nHitX4 >> _tstringtemp;
86        _p3.push_back(_tstringtemp.Atof());              _iDayLast_nHitX4.push_back(_tstringtemp.Atoi());
87                
88          if (_nPar>=0 && _nPar<=5) {
89            for (int iPar=0; iPar<_nPar; iPar++) {
90          
91              _chi2CutTable_nHitX4 >> _tstringtemp;
92              _p_nHitX4[iPar].push_back(_tstringtemp.Atof());
93            
94            }
95          }
96                
97      }      }
98      _chi2CutTable.close();      _chi2CutTable_nHitX4.close();
99    
100    
101    }    }
102    
# Line 91  private: Line 118  private:
118    
119      virtual double _GetChi2(PamLevel2 *event);      virtual double _GetChi2(PamLevel2 *event);
120    
121      const char* _calibFile;      const char* _calibFile_nHitX3;
122        const char* _calibFile_nHitX4;
123        Int_t _nPar;
124    
125      TString _tstringtemp;      TString _tstringtemp;
126            
127        std::vector<Int_t> _iDayFirst_nHitX3;
128        std::vector<Int_t> _iDayFirst_nHitX4;
129      std::vector<Int_t> _iDayFirst;      std::vector<Int_t> _iDayFirst;
130        
131        std::vector<Int_t> _iDayLast_nHitX3;
132        std::vector<Int_t> _iDayLast_nHitX4;
133      std::vector<Int_t> _iDayLast;      std::vector<Int_t> _iDayLast;
     std::vector<Double_t> _p0;  
     std::vector<Double_t> _p1;  
     std::vector<Double_t> _p2;  
     std::vector<Double_t> _p3;  
   
     ifstream _chi2CutTable;  
134            
135      Double_t _p0sel, _p1sel, _p2sel, _p3sel;      std::vector<Double_t> _p_nHitX3[5];
136        std::vector<Double_t> _p_nHitX4[5];
137        std::vector<Double_t> _p[5];
138        
139        ifstream _chi2CutTable_nHitX3;
140        ifstream _chi2CutTable_nHitX4;
141        
142        Double_t _pSel[5];
143            
144      TTimeStamp _time;      TTimeStamp _time;
145    
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