#include <TPCPIDVariation.hxx>

Inheritance diagram for TPCPIDVariation:

Public Types
enum	HypEnum { kMuon = 0, kElectron, kProton, kPion, kKaon, kNPULLS }
	Enum for particle hypothesis.

Public Member Functions
	TPCPIDVariation ()
	Instantiate the PID variation,.

virtual void	ApplyVariation (AnaTrackB *track, const ToyExperiment &exp)
	Apply variation for a track, the most general case given a certain ToyExperiment.

virtual bool	GetVariation (const AnaTPCParticleB &tpcTrack, Float_t &mean_var, Float_t &sigma_var, const AnaTrackB &track, const ToyExperiment &exp)=0

virtual bool	GetPIDParams (const AnaTPCParticleB &tpcTrack, Float_t &dEdxExp, Float_t &dEdxSigma, const AnaTrackB &track)

Protected Attributes
BinnedParams *	_mean [kNPULLS]

BinnedParams *	_sigma [kNPULLS]

Detailed Description

This variation that smears that the measured dEdXMeas (CT) for the TPC segments of the track The smearing is done assuming the variation based on pull parameters

Definition at line 12 of file TPCPIDVariation.hxx.

Member Function Documentation

§ GetPIDParams()

bool TPCPIDVariation::GetPIDParams	(	const AnaTPCParticleB &	tpcTrack,
		Float_t &	dEdxExp,
		Float_t &	dEdxSigma,
		const AnaTrackB &	track
	)

virtual

Get the expected dEdX and error, keep it virtual so that one can easily add new hypothesis, e.g. kaons Global track is also provided so that one can use it for example to retrieve the PID info

Definition at line 89 of file TPCPIDVariation.cxx.

                              {
   //**************************************************
   
   // Need true particle
   if (!track.GetTrueParticle()) return false; 
 
   // Get the expected dEdx and error on the dEdx depending on the true particle of the 
   // (global) track
   
   Int_t PDG = abs(track.GetTrueParticle()->PDG);
   
   switch (PDG){
     case 13: // Muon
       dEdxExp = (Float_t)tpcTrack.dEdxexpMuon;
       dEdxSigma = (Float_t)tpcTrack.dEdxSigmaMuon;
       break;    
     case 211: // Pion
       dEdxExp = (Float_t)tpcTrack.dEdxexpPion;
       dEdxSigma = (Float_t)tpcTrack.dEdxSigmaPion;
       break;
     case 11: // Electron
       dEdxExp = (Float_t)tpcTrack.dEdxexpEle;
       dEdxSigma = (Float_t)tpcTrack.dEdxSigmaEle;
       break;
     case 2212: // Proton
       dEdxExp = (Float_t)tpcTrack.dEdxexpProton;
       dEdxSigma = (Float_t)tpcTrack.dEdxSigmaProton;
       break;
     default:
       return false;
       break;
   }
   
   // Is it needed?
   if (dEdxSigma == -99999    || dEdxExp ==-99999)    return false;
   if (dEdxSigma == -0xABCDEF || dEdxExp ==-0xABCDEF) return false;
 
   return true; 
 
 }

§ GetVariation()

virtual bool TPCPIDVariation::GetVariation	(	const AnaTPCParticleB &	tpcTrack,
		Float_t &	mean_var,
		Float_t &	sigma_var,
		const AnaTrackB &	track,
		const ToyExperiment &	exp
	)

pure virtual

Get the variation, two params: one for mean and one for sigma Sigma_var: is the param to control how one wants to scale the pull sigma: (pull_sigma_new/pull_sigma_old) Mean_var: the shift one wants to apply to pull mean: pull_mean_new - pull_mean_old In principle should be enough to have it for the TPC segment but in the "regular" TPC PID syst code the corresponding truth track and momentum are retrived from the global track so keep it as a parameter as well Toy experiment is used to retrieve the variation

Implemented in TPCPIDPullMCCorrection, and TPCPIDSystematics.

Member Data Documentation

§ _mean

BinnedParams* TPCPIDVariation::_mean[kNPULLS]

protected

Expect that the derived classes should use some data to store the params for the variations so keep the data-storage here

Definition at line 66 of file TPCPIDVariation.hxx.

The documentation for this class was generated from the following files:

/hep/T2K/nd280rep/ANALYSIS/HIGHLAND2/ANAPARTICLE/psyche/psycheND280Utils/v3r12/src/TPCPIDVariation.hxx
/hep/T2K/nd280rep/ANALYSIS/HIGHLAND2/ANAPARTICLE/psyche/psycheND280Utils/v3r12/src/TPCPIDVariation.cxx

Public Types