1. Jaewon Park University of Rochester
nu_e Study
Jaewon Park
University of Rochester
TP Physics Study Meeting Dec 12, 2008

2. Overview NuMI beam contains ~1% nu_e.
nu_e event rate is small but nu_e event (ne n  e+p) is clean and distinctive.
Neutrino flux and energy spectrum can be measured using nu_e scattering.
Main background is pi0+p event where one of gamma is not reconstructed.
To separate the electron track from other track is main job in this study.
Previous study was based on full minerva detector.
Tried to repeat it with TP geometry (10Tracker+10Ecal)

3. Ratio of Track Thickness
Compare average number of strips
used in first (2/3) part of the track
compared to the last (1/3)
gamma
proton
Most of electron track in TP enter in ECal.
gamma
proton
TP detector

4. Primary Vertex to Track Distance
The distance is bigger than TP detector size
It looks that it has bug on the calculation.
True pv to track
Reco pv to track
Full Minerva
Full Minerva
True pv to track
Reco pv to track TP TP

5. Pt imbalance Pt was calculated from true MC momentum.
Energy (momentum) resolution will spread Pt distribution.
Nu_e
Cut: Pt<250MeV/c
Vittorio ask Pt sum of all tracks
Pt plot (nRecon=2) and Pt Plot(nRecon>=2)
Nu_mu