Analysis on TP detector Jaewon Park University of Rochester MINERvA/Jupiter Group Meeting, Dec 19, 2007

2 Plan Basic things.  Calorimeter calibration  Minimum energy or minimum track length  Track efficiencies.  Study done mostly using truth process information (no particle id) Focus on processes for TP detector at LE beam:  NC/CC, nu+N->pi0+(mu)+X  NC/CC, nu+N->p+pi0+(mu)  QE nu_e Before doing particle Id,  Define requirement that defines data sample set. Particle Id,  Calculate (mis)identification efficiency.  Can we see rare channel(CC nu_e) out of resembling event?

3 Event sample size Haven’t check actual (event rate)*(volume) *(time) calculation. Relative fraction is shown Channel relative fraction to CC Total CC CC nu+N → mu + pi0 + X NC nu+N → pi0 + X CC nu+N → mu + p + pi0 + X NC nu+N → p + pi0 + X CC nu_e+N True event info

4 TP geometry Minos TrakerECal Geant3-based minerva MC simulation Using TP geometry + LE beam spectrum  10 Tracker + 10 Ecal Start with restriction that primary vertex is within pure plastic part of tracke r. Check track efficiencies. Calorimeter performance

5 Track efficiencies MuonProton

6 Track efficiencies Pi+/Pi-Gamma Tracker is not tuned for gamma

7 Track efficiencies Electron (CC nu_e)

8 Calorimeter energy Use same calibration c onstant as full minerv a detector. Do calorimetric energ y sum of every hits of reconstructed track. Haven’t included OD hit energy yet.

9 Containment Initial event generated at vz=(-43,0) Compare with vz=(-43,-30) selection (start position of gamma track)<-30 will be also useful. Gamma Proton

10 Containment Initial event generated at vz=(-43,0) Leakage in histogram mainly from high energy particle. Low energy(red) particle shows much less leakage. How do we know certain track is really low energy particle without looking at true MC value? Gamma Proton E<1.5GeV (53% of reco track)E<0.5GeV (63% of reco track)