This page lists the basic (charged) Particle Identification (PID) lists produced at run-time. The PID lists consist of particles that pass a given PID selector. Each PID selector uses a number of PID variables to accept or reject a given track. The variables used for each type of particle are listed in the tables. Currently, the PID group provides several different types of PID selector:
The PID lists are produced by the BetaPid package.
For more information and detailed documentation of each selector, see the PID homepage, in particular the PID selectors documentation page.
Electrons | |
| Variable | Description |
| E/p | Ratio of energy deposited in the calorimeter, to track momentum. |
| Ncry | Number of EMC crystals hit |
| LAT | Lateral energy distribution |
| A42 | Zernike moment |
| dE/dx | Energy loss in the DCH |
| theta_c | Cerenkov angle in the DRC |
| N_gamma | Number of photons in DRC |
| N_gamma_exp | Number of photons expected |
| Delta_phi | Track-bump separation |
| Selector Type | Lists |
| Cut-based ("Micro") |
eMicroNoCal eMicroVeryLoose eMicroLoose eMicroTight eMicroVeryTight |
| Likelihood ("LH") | PidLHElectrons |
| Roy ("Roy") |
eRoyLoose |
Muons | |
| Variable | Description |
| Ecand | Energy released in the EMC. |
| NL | Number of IF hit layers in a cluster |
| Lambda_meas | Measured number of interaction lengths traversed. |
| Delta_Lambda | Difference between the expected (for muons) and measured number of interaction lengths traversed.. |
| chi2fit | chi2/dof of IFR hit strips in a polynomial fit of the cluster. |
| chi2mat | chi2/dof of the IFR hit strips in the track extrapolation. |
| Tc | Track continuity. |
| m and sigma_m | Average multiplicity of hit strips per layer, and its standard deviation. |
| Selector Type | Lists |
| Cut-based ("Micro") |
muMicroMinimumIonizing
muMicroVeryLoose muMicroLoose muMicroTight muMicroVeryTight |
| Neural Net |
muNNVeryLoose muNNLoose muNNTight muNNVeryTight muNNVeryLooseFakeRate muNNLooseFakeRate muNNTightFakeRate muNNVeryTightFakeRate |
| Likelihood |
muLikeVeryLoose muLikeLoose muLikeTight |
Kaons | |
| Variable | Description |
| dE/dx | Energy loss in the SVT and DCH |
| theta_c | Cerenkov angle in the DRC |
| N_gamma | Number of photons in DRC |
| N_gamma_exp | Number of photons expected |
| Selector Type | Lists |
| Neural Network ("Micro") |
KMicroVeryLoose KMicroLoose KMicroTight KMicroVeryTight KMicroNotPion KMicroNotPionGTL |
| Roy ("Roy") |
KRoyLoose KRoyDefault KRoyNotPion KRoyNotPionOrUnknown |
| Simple (K-ID cut only) |
KSimpleLoose KSimpleTight |
| Neural Network |
KNNVeryLoose KNNLoose KNNTight KNNVeryTight KNNNotPion |
| Likelihood |
KLHNotPion
KLHVeryLoose KLHLoose KLHTight KLHVeryTight KLHNotPionGTL KGLHTight |
Pions | |
| Variable | Description |
| dE/dx | Energy loss in the SVT and DCH |
| theta_c | Cerenkov angle in the DRC |
| N_gamma | Number of photons in DRC |
| TrkQual | Track quality |
| iselectron | Whether the track passes the LH electron selector |
| ismuon | Whether the track passes the MicroVeryTight muon selector |
| Selector Type | Lists |
| Likelihood ("LH") |
piLHVeryLoose piLHLoose piLHTight piLHVeryTight piGLHTight |
| Roy ("Roy") |
piRoyLoose piRoyNotKaon |
Protons | |
| Variable | Description |
| dE/dx | Energy loss in the SVT and DCH |
| theta_c | Cerenkov angle in the DRC |
| N_gamma | Number of photons in DRC |
| TrkQual | Track quality |
| iselectron | Whether the track passes the LH electron selector |
| ismuon | Whether the track passes the MicroVeryTight muon selector |
| Selector Type | Lists |
| Likelihood ("LH") |
pLHVeryLoose pLHLoose pLHTight pLHVeryTight pGLHTight |
PID SubLists (SmpPidRefineProdSequence.tcl)Candidate must be a member of BOTH lists. | |
| muNNTightGTL | muNNTight GoodTracksLoose |
| PidLHElectronsGTL |
PidLHElectrons GoodTracksLoose |
| piLHLooseGTVL |
piLHLoose GoodTracksVeryLoose |
| piLHLooseGTL |
piLHLoose GoodTracksLoose |
| muNotEl | mNNTight NOT eLHBremAndGTL |
| eLooseNoCal |
eMicroNoCal eMicroLoose |
| eOrMuBremAndGTL |
muNotEl eLHBremAndGTL |