00001 #ifndef Kalman_Vertex_Fit_H 00002 #define Kalman_Vertex_Fit_H 00003 00004 #include <vector> 00005 #include "VertexFit/HTrackParameter.h" 00006 #include "VertexFit/VertexParameter.h" 00007 #include "VertexFit/WTrackParameter.h" 00008 00009 using namespace std; 00010 // 00011 // Kalman vertex fit interface 00012 // 00013 // Apr. 13, 2007, K.L. He created 00014 // 00015 00016 class KalmanVertexFit { 00017 00018 public: 00019 00020 static KalmanVertexFit *instance(); 00021 ~KalmanVertexFit(); 00022 00023 // 00024 // initialization 00025 void init(); 00026 // 00027 // initial vertex parameter 00028 // 00029 void initVertex(const VertexParameter vtx); 00030 // 00031 // track interface 00032 // 00033 void addTrack(const HTrackParameter); 00034 // 00035 // an interface for magnetic field 00036 // 00037 00038 /* will in added in the future */ 00039 00040 // 00041 // the method of filter 00042 // 00043 int filter(const int k); // iteration for track k; 00044 void filter(); 00045 // 00046 // the method of inverse filter 00047 // 00048 void inverse(const int k); // inverse kalman filter 00049 // 00050 // the method of smooth 00051 // 00052 void smooth(const int k); 00053 void smooth(); 00054 // 00055 // remove track k 00056 // 00057 void remove(const int k); // remove track k from vertex, done by user 00058 00059 // xum 00060 HepVector pull(const int k); 00061 double pullmomentum(const int k); 00062 // 00063 // output of Kalman vertex fit 00064 // 00065 00066 // updated vertex information 00067 VertexParameter vtx() const; 00068 HepVector x() const {return m_x;} 00069 HepSymMatrix Ex() const; 00070 00071 // 00072 // number of track, chi-square, etc 00073 // 00074 int numTrack() const; 00075 int ndof() const {return m_ndof;} 00076 double chisq() {return m_chisq;} 00077 int trackID(const int k) const {return m_hTrkOrigin[k].trackID();} 00078 std::vector<int> trackIDList() const; // ID of tracks constribute to vertex fitting 00079 00080 // 00081 // chi-square of filter and smooth 00082 // 00083 double chiF(const int k) const {return m_chiF[k];} // chi-square of filter for track k 00084 double chiS(const int k) const; // chi-square of smooth for track k 00085 00086 // 00087 // updated helix parameter after fit 00088 // 00089 HTrackParameter hTrack(const int k) const; // at cloest point approach to origin 00090 WTrackParameter wTrack(const int k, const double mass) const; // at the vertex position 00091 00092 // 00093 // set the number of iteration, chi-square cut for tracks 00094 // 00095 void setVertexIteration(const int num) {m_maxVertexIteration = num;} 00096 void setTrackIteration(const int num) {m_maxTrackIteration = num;} 00097 void setChisqCut(const double chicut) {m_chisqCutforTrack = chicut;} 00098 void setTrackIterationCut(const double chicut) {m_chisqCutforTrackIteration = chicut;} //xum 00099 // 00100 // set input vector<HTrackParameter>, wait for some days 00101 // 00102 00103 private: 00104 void updateMatrices(const int k); // update derivative matrices during filter 00105 void updateMatrices(const int k, const HepVector p, const HepVector x); // update derivative matrices during filter 00106 KalmanVertexFit(); // constructor 00107 static KalmanVertexFit *m_pointer; // pointer 00108 00109 private: 00110 HepVector m_x; // vertex position 00111 HepSymMatrix m_C0; // Initial inverse covariance matrix of vertex 00112 HepSymMatrix m_C; // current inverse covariance matrix of vertex 00113 int m_ndof; // number of degree of freedom = 2 * nTrk -3 00114 double m_chisq; // total chisq of vertex fit 00115 private: 00116 std::vector<int> m_flag; // remove flag for track k; 00117 std::vector<HepVector> m_p; // 3-momentum at vertex position for track k 00118 std::vector<HTrackParameter> m_hTrkOrigin; // measured helix parameter for track k 00119 std::vector<HTrackParameter> m_hTrkInfit; // xum add 00120 private: 00121 std::vector<HepSymMatrix> m_G; // 5x5 matrix G=V^{-1}, inversion of error matrix for track k, do not change during fitting 00122 std::vector<HepMatrix> m_A; // 5x3 derivative matrix da/dx for track k 00123 std::vector<HepMatrix> m_B; // 5x3 derivative matrix da/dp for track k 00124 std::vector<HepVector> m_c; // c0 vector for track k 00125 std::vector<HepSymMatrix> m_W; // 3x3 matrix (BT * G * B)^{-1} 00126 std::vector<HepSymMatrix> m_GB; // 5x5 matrix 00127 std::vector<double> m_chiF; // chisq of filter 00128 00129 private: //xum 00130 double calculationP(const double kappa, const double lamb); 00131 double calculationSigmaP(const double kappa, const double lamb, const double Vkappa, 00132 const double Vlamb, const double Vkappa_lamb); 00133 00134 private: 00135 double m_chisqCutforTrack; // chisq cut 00136 int m_maxVertexIteration; // number of iteration, 3 times are enough 00137 int m_maxTrackIteration; 00138 double m_chisqCutforTrackIteration; 00139 }; 00140 #endif
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