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0001 /* 0002 * This file is part of KFParticle package 0003 * Copyright (C) 2007-2019 FIAS Frankfurt Institute for Advanced Studies 0004 * 2007-2019 Goethe University of Frankfurt 0005 * 2007-2019 Ivan Kisel <I.Kisel@compeng.uni-frankfurt.de> 0006 * 2007-2019 Maksym Zyzak 0007 * 0008 * KFParticle is free software: you can redistribute it and/or modify 0009 * it under the terms of the GNU General Public License as published by 0010 * the Free Software Foundation, either version 3 of the License, or 0011 * (at your option) any later version. 0012 * 0013 * KFParticle is distributed in the hope that it will be useful, 0014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 0015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0016 * GNU General Public License for more details. 0017 * 0018 * You should have received a copy of the GNU General Public License 0019 * along with this program. If not, see <https://www.gnu.org/licenses/>. 0020 */ 0021 0022 #ifndef KFMCTRACK_H 0023 #define KFMCTRACK_H 0024 0025 #include <cmath> 0026 0027 /** @class KFMCTrack 0028 ** @brief A class for storage of the Monte Carlo simulated track in the cartesian parametrisation. 0029 ** @author M.Zyzak, I.Kisel 0030 ** @date 05.02.2019 0031 ** @version 1.0 0032 ** 0033 ** A track is described with the parameters { X, Y, Z, Px, Py, Pz, q/P }. Parameters are stored at 0034 ** the origin position. Class also contains Id of the mother track, PDG code for the current track, 0035 ** number of Monte Carlo points produced by the simulation engine at the detector stations, 0036 ** number of Monte Carlo points produced at the precise detectors (like MVD in CBM, HFT in STAR, 0037 ** ITS in ALICE, etc.). It also has a flag showing if track was found by the reconstruction procedure 0038 ** for efficiency calculation, and a flag showing if track was out of acceptance. 0039 **/ 0040 0041 class KFMCTrack 0042 { 0043 public: 0044 KFMCTrack():fMotherId(-1),fPDG(0),fNMCPoints(0), fNMCPixelPoints(0), fIsReconstructed(0),fIsOutOfDetector(0) {}; 0045 0046 int MotherId() const { return fMotherId; } ///< Returns a uniqueue Id of the mother track or primary vertex KFMCTrack::fMotherId. 0047 int PDG() const { return fPDG;} ///< Returns PDG code of the track KFMCTrack::fPDG. 0048 float Par( int i ) const { return fPar[i]; } ///< Returns value of the parameter KFMCTrack::fPar with index "i". 0049 float X() const { return fPar[0]; } ///< Returns X coordinate of the track at the origin position. 0050 float Y() const { return fPar[1]; } ///< Returns Y coordinate of the track at the origin position. 0051 float Z() const { return fPar[2]; } ///< Returns Y coordinate of the track at the origin position. 0052 float L() const { return sqrt(X()*X() + Y()*Y() + Z()*Z()); } ///< Returns distance from the origin of the track to a point {0,0,0}. 0053 float Px() const { return fPar[3]; } ///< Returns Px momentum component of the track at the origin position. 0054 float Py() const { return fPar[4]; } ///< Returns Py momentum component of the track at the origin position. 0055 float Pz() const { return fPar[5]; } ///< Returns Pz momentum component of the track at the origin position. 0056 float P() const { return sqrt(fPar[3]*fPar[3] + fPar[4]*fPar[4] + fPar[5]*fPar[5]); } ///< Returns momentum of the track. 0057 float Pt() const { return sqrt(fPar[3]*fPar[3] + fPar[4]*fPar[4]); } ///< Returns transverse momentum of the track. 0058 const float *Par() const { return fPar; } ///< Returns a pointer to the array with track parameters KFMCTrack::fPar. 0059 int NMCPoints() const { return fNMCPoints; } ///< Returns number of MC points KFMCTrack::fNMCPoints. 0060 int NMCPixelPoints() const { return fNMCPixelPoints; } ///< Returns number of MC points at the precise detectors KFMCTrack::fNMCPixelPoints. 0061 bool IsReconstructed() const { return fIsReconstructed; } ///< Returns a flag showing if track was found by the reconstruction procedure. 0062 bool IsOutOfDetector() const { return fIsOutOfDetector; } ///< Returns a flag showing if track was out of acceptance. 0063 0064 void SetPar( int i, float v ) { fPar[i] = v; } ///< Sets a value "v" to the parameter with index "i". 0065 void SetX( float v ) { fPar[0] = v; } ///< Sets X coordinate at the origin position of the track. 0066 void SetY( float v ) { fPar[1] = v; } ///< Sets Y coordinate at the origin position of the track. 0067 void SetZ( float v ) { fPar[2] = v; } ///< Sets Z coordinate at the origin position of the track. 0068 void SetPx( float v ) { fPar[3] = v; } ///< Sets Px momentum component at the origin position of the track. 0069 void SetPy( float v ) { fPar[4] = v; } ///< Sets Py momentum component at the origin position of the track. 0070 void SetPz( float v ) { fPar[5] = v; } ///< Sets Pz momentum component at the origin position of the track. 0071 void SetQP( float v ) { fPar[6] = v; } ///< Sets q/P at the origin position of the track. 0072 void SetMotherId( int v ) { fMotherId = v; } ///< Sets a unique id of the mother track if track is secondary or primary vertex with a negative sign if it is primary. 0073 void SetPDG( int v ) { fPDG = v; } ///< Sets PDG code of the current track. 0074 void SetNMCPoints( int v ) { fNMCPoints = v; } ///< Sets number of MC points produced at the detector planes. 0075 void SetNMCPixelPoints( int v ){ fNMCPixelPoints = v; } ///< Sets number of the MC points produced at the precise detectors. 0076 void SetReconstructed() { fIsReconstructed = 1; } ///< Defines the track as reconstructed. 0077 void SetNotReconstructed() { fIsReconstructed = 0; } ///< Defines the track as not reconstructed. 0078 void SetOutOfDetector() { fIsOutOfDetector = 1; } ///< Defines the track out of acceptance. 0079 0080 protected: 0081 0082 int fMotherId; ///< Index of the mother track in tracks array. If track is produced at the primary vertex (PV) negative value with the PV Id is assigned. 0083 int fPDG; ///< The PDG code of the current Monte Carlo track. 0084 float fPar[7]; ///< Parameters of the track: { X, Y, Z, Px, Py, Pz, q/P }, where "q" is its charge. 0085 int fNMCPoints; ///< Total number of Monte Carlo points produced by the simulation engine at the detector stations. 0086 int fNMCPixelPoints; ///< Number of Monte Carlo points produced at the precise detectors (like MVD in CBM, HFT in STAR, ITS in ALICE, etc.). 0087 0088 bool fIsReconstructed; ///< A flag showing if track was found by the reconstruction procedure. Is required for correct efficiency calculation. 0089 bool fIsOutOfDetector; ///< A flag showing if track was out of acceptance. Is required for correct calculation of the acceptance. 0090 }; 0091 0092 #endif
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