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File indexing completed on 2024-09-28 07:02:49
0001 /** 0002 \file 0003 Declaration of class Smear::ParticleMCS. 0004 0005 \author Michael Savastio 0006 \date 2011-08-19 0007 \copyright 2011 Brookhaven National Lab 0008 */ 0009 0010 #ifndef INCLUDE_EICSMEAR_SMEAR_PARTICLEMCS_H_ 0011 #define INCLUDE_EICSMEAR_SMEAR_PARTICLEMCS_H_ 0012 0013 #include <cmath> 0014 #include <TLorentzVector.h> 0015 0016 #include "eicsmear/erhic/Pid.h" 0017 #include "eicsmear/erhic/VirtualParticle.h" 0018 #include "eicsmear/smear/SmearConstants.h" 0019 #include <iostream> 0020 0021 namespace Smear { 0022 0023 class Event; 0024 0025 /** 0026 A smeared Monte Carlo particle. 0027 */ 0028 class ParticleMCS : public erhic::VirtualParticle { 0029 0030 public: 0031 /** 0032 Destructor. 0033 */ 0034 virtual ~ParticleMCS(); 0035 0036 /** 0037 Default constructor. 0038 Initialises the Particle from the argument string with the format 0039 I KS id orig daughter ldaughter px py pz m E xv yv zv 0040 */ 0041 ParticleMCS(); 0042 0043 /** 0044 Construct from an E-p 4-vector, pdg code and status code. 0045 */ 0046 ParticleMCS(const TLorentzVector&, int pdg, int status); 0047 0048 // Let's kill all else 0049 ParticleMCS(const ParticleMCS&) =delete; 0050 ParticleMCS& operator=(const ParticleMCS&) =delete; 0051 0052 0053 // --------------- 0054 // --- Getters --- 0055 // --------------- 0056 /** 0057 Returns the x component of 3-momentum. 0058 */ 0059 virtual Double_t GetPx() const; 0060 0061 /** 0062 Returns the y component of 3-momentum. 0063 */ 0064 virtual Double_t GetPy() const; 0065 0066 /** 0067 Returns the z component of 3-momentum. 0068 */ 0069 virtual Double_t GetPz() const; 0070 0071 /** 0072 Returns the energy of the particle in the lab frame. 0073 */ 0074 virtual Double_t GetE() const; 0075 0076 /** 0077 Returns the (E,p) 4-vector in the lab frame. 0078 */ 0079 virtual TLorentzVector Get4Vector() const; 0080 0081 /** 0082 Returns the (E,p) 4-vector in the lab frame. 0083 */ 0084 virtual TLorentzVector PxPyPzE() const { return Get4Vector(); } 0085 0086 /** 0087 Returns the apparent mass of the smeared particle. 0088 \todo Consider the implementation here. 0089 If the particle is identified (either correctly or incorrectly), 0090 it could return the PDG mass of that particle. 0091 If the particle is not identified, should it return sqrt(E^2 - p^2)? 0092 What about if p or E are not known? Return E or p? Or zero (e.g. 0093 that would work for photons, E known, p not). 0094 */ 0095 virtual Double_t GetM() const; 0096 0097 /** 0098 Returns momentum transverse to the beam direction. 0099 \todo check this is set properly 0100 */ 0101 virtual Double_t GetPt() const; 0102 0103 /** 0104 Returns the origin point of the particle (cm). 0105 (0,0,0) indicates a particle originating in the collision. 0106 */ 0107 virtual TVector3 GetVertex() const; 0108 0109 /** 0110 Returns the total momentum (GeV). 0111 */ 0112 virtual Double_t GetP() const; 0113 0114 /** 0115 Returns the polar angle in the range [0,pi] radians. 0116 */ 0117 virtual Double_t GetTheta() const; 0118 0119 /** 0120 Returns the polar angle in the range [0,2pi] radians. 0121 */ 0122 virtual Double_t GetPhi() const; 0123 0124 /** 0125 Returns the rapidity. 0126 */ 0127 virtual Double_t GetRapidity() const; 0128 0129 /** 0130 Returns the pseudorapidity. 0131 */ 0132 virtual Double_t GetEta() const; 0133 0134 /** Returns a status code following the PYTHIA defintion, where 0135 21 indicates an initial-state particle and 1 indicates a final- 0136 state particle 0137 */ 0138 virtual UShort_t GetStatus() const; 0139 0140 /** 0141 Returns the pdg ID of the particle. 0142 */ 0143 virtual ::erhic::Pid Id() const; 0144 0145 /** 0146 Returns the numSigma deviation of this particle 0147 */ 0148 double GetNumSigma() const; 0149 0150 /** 0151 Returns the numSigma deviation type (pi_k, k_p) of this particle 0152 */ 0153 int GetNumSigmaType() const; 0154 0155 /** should always be true for a ParticleMCS 0156 This replaces the brittle mechanism of checking values against 0 0157 If false, it should indicate an old tree was used. 0158 */ 0159 virtual bool IsSmeared() const; 0160 virtual bool IsESmeared() const; //< E smeared? 0161 virtual bool IsPSmeared() const; //< Total momentum smeared? 0162 virtual bool IsPtSmeared() const; //< P_t smeared? 0163 virtual bool IsPxSmeared() const; //< P_x smeared? 0164 virtual bool IsPySmeared() const; //< P_y smeared? 0165 virtual bool IsPzSmeared() const; //< P_z smeared? 0166 virtual bool IsThetaSmeared() const; //< θ smeared? 0167 virtual bool IsPhiSmeared() const; //< φ smeared? 0168 virtual bool IsIdSmeared() const; //< pdg Id smeared? 0169 virtual bool IsNumSigmaSmeared() const; //< PID numSigma smeared? 0170 0171 // --------------- 0172 // --- Setters --- 0173 // --------------- 0174 /** Set energy. By default, marks it as smeared and checks that it wasn't before. 0175 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0176 */ 0177 virtual void SetE(const Double_t value, const bool CheckSetSmearFlag=true); 0178 0179 /** Set total momentum P. By default, marks it as smeared and checks that it wasn't before. 0180 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0181 */ 0182 virtual void SetP(const Double_t value, const bool CheckSetSmearFlag=true); 0183 0184 /** Set transverse momentum Pt. By default, marks it as smeared and checks that it wasn't before. 0185 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0186 */ 0187 virtual void SetPt(const Double_t value, const bool CheckSetSmearFlag=true); 0188 0189 /** Set P_x. By default, marks it as smeared and checks that it wasn't before. 0190 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0191 */ 0192 virtual void SetPx(const Double_t value, const bool CheckSetSmearFlag=true); 0193 0194 /** Set P_y. By default, marks it as smeared and checks that it wasn't before. 0195 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0196 */ 0197 virtual void SetPy(const Double_t value, const bool CheckSetSmearFlag=true); 0198 0199 /** Set P_z. By default, marks it as smeared and checks that it wasn't before. 0200 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0201 */ 0202 virtual void SetPz(const Double_t value, const bool CheckSetSmearFlag=true); 0203 0204 /** Set azimuth φ. By default, marks it as smeared and checks that it wasn't before. 0205 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0206 */ 0207 virtual void SetPhi(const Double_t value, const bool CheckSetSmearFlag=true); 0208 0209 /** Set polar angle θ. By default, marks it as smeared and checks that it wasn't before. 0210 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0211 */ 0212 virtual void SetTheta(const Double_t value, const bool CheckSetSmearFlag=true); 0213 0214 /** Set particle id (pdg code). By default, marks it as smeared and checks that it wasn't before. 0215 @param CheckSetSmearFlag=false disables this check (e.g. for adjustments) 0216 */ 0217 virtual void SetId(Int_t value, const bool CheckSetSmearFlag=true); 0218 0219 /** Set the numSigma deviation of this particle 0220 */ 0221 virtual void SetNumSigma( const double d, const bool CheckSetSmearFlag=true); 0222 0223 /** Set the numSigma deviation type (pi_k, k_p) of this particle 0224 */ 0225 virtual void SetNumSigmaType( const int i); 0226 0227 virtual void SetSmeared( bool flag=true); //< Particle smeared 0228 virtual void SetESmeared( bool flag=true); //< E smeared 0229 virtual void SetPSmeared( bool flag=true); //< Total momentum smeared 0230 virtual void SetPtSmeared( bool flag=true); //< P_t smeared 0231 virtual void SetPxSmeared( bool flag=true); //< P_x smeared 0232 virtual void SetPySmeared( bool flag=true); //< P_y smeared 0233 virtual void SetPzSmeared( bool flag=true); //< P_z smeared 0234 virtual void SetThetaSmeared( bool flag=true); //< θ smeared 0235 virtual void SetPhiSmeared( bool flag=true); //< φ smeared 0236 virtual void SetIdSmeared( bool flag=true); //< pdg Id smeared 0237 virtual void SetNumSigmaSmeared( bool flag=true); //< PID numSigma smeared 0238 0239 0240 /** 0241 Dummy one; just need to compile; 0242 */ 0243 void Set4Vector(const TLorentzVector&) { } 0244 0245 virtual void SetStatus(Int_t); 0246 0247 virtual UShort_t GetParentIndex() const { return 0; } 0248 0249 /** 0250 Prints the attributes of this particle to standard output. 0251 The output format is "status id px py pz E". 0252 */ 0253 virtual void Print(Option_t* = "") const; 0254 0255 /** 0256 Sets the origin coordinates. 0257 No-op, just required for compilation. 0258 */ 0259 virtual void SetVertex(const TVector3&) { } 0260 0261 /** 0262 Stores z in the ParticleS.K where K is the kinematic variable associated with kin. 0263 */ 0264 virtual void SetVariable(const double z, const KinType kin); 0265 0266 /** 0267 This dictates how the class deals with positive definite variables 0268 which have been smeared to negative values. 0269 */ 0270 void HandleBogusValues( const KinType kin ); 0271 0272 0273 protected: 0274 0275 /** should always be true for a ParticleMCS 0276 This replaces the brittle mechanism of checking values against 0 0277 If false, it should indicate an old tree was used. 0278 */ 0279 bool kParticleSmeared=false; 0280 bool kESmeared=false; 0281 bool kPSmeared=false; 0282 bool kPtSmeared=false; 0283 bool kPxSmeared=false; 0284 bool kPySmeared=false; 0285 bool kPzSmeared=false; 0286 bool kThetaSmeared=false; 0287 bool kPhiSmeared=false; 0288 bool kIdSmeared=false; 0289 bool kNumSigmaSmeared=false; 0290 0291 0292 UShort_t status; ///< Status code 0293 Int_t id; ///< PDG particle code 0294 Double32_t px; ///< x component of particle momentum 0295 Double32_t py; ///< y component of particle momentum 0296 Double32_t pz; ///< z component of particle momentum 0297 Double32_t E; ///< Energy of particle 0298 Double32_t pt; ///< Transverse momentum of particle 0299 Double32_t p; ///< Total momentum of particle 0300 Double32_t theta; ///< Polar angle 0301 Double32_t phi; ///< Azimuthal angle 0302 0303 double numSigma; ///< PID: nSigma deviation 0304 int numSigmaType; ///< PID: nSigma deviation type. pi_k == 1, k_p == 2. \TODO: This should be agreed upon and fixed better. 0305 0306 ClassDef(Smear::ParticleMCS, 3) 0307 }; 0308 0309 0310 } // namespace Smear 0311 0312 #endif // INCLUDE_EICSMEAR_SMEAR_PARTICLEMCS_H_
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