To be finished.

Data Format

The MN ntuple could be used directly, but a preselected sample is also prepared by Shaowen Zhang. It is placed under

/farm/nas03/user/zhangs/filter-electron

directory. There are posevents and negevents directory which store events according to rigidity sign.

The preselection for this sample is:

1. goodDAQ :
   • not badrun not in inSAA livetime>0.7 not pass Solar Array zenith<40 good RTI good alignment
2. with Tracker Track :
   • ntrk>0
3. (rigidity sign : rig[1]<0 or rig[1]>0)
4. 1or2 shower :
   • ecal_nsh<3
5. charge1 :
   • 0.8<trk_qin<1.4
6. shower-track matching :
   • shower-track match X 2cm Y 5 cm
7. ecal fiducial volume :
   • Ecal fiducial volume 30.6cm
8. above cutoff :
   • cutoff
9. good TRD :
   • trd_nhits[1]>14
10. good TOF beta :
    • tof_patth=4444 && tof_betah>0.8
11. tracker quality :
    • trk_chi2y<10 trk_chi2x<10
12. EoP :
    • eop>0.3

Analysis procedure

to be finished...

-- TangZhicheng - 2016-04-08