Analysis of ESEv3 in Comparison with PisaEcalBDT - Study and Findings
Our analysis compares PisaEcalBDT with ESEv3 in proton detection. The study evaluates various factors such as side leakage, shower axis direction, and potential corrections using a new function. Uncertainty in antiproton detection is discussed along with current studies' status and future plans for proton and antiproton selection. The detailed pre-selection criteria and the challenges faced in implementing the selection process are also highlighted.
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PisaEcalBDT v.s. ESEv3 Li.Tao and Jie.Feng 2024/8/28 1
Motivation By Li, 14 May 2
260~350GeV (rig<0) 23 352 17 (23-17)/352=1.7% 3
Esev3 proton-(1/3) Proton? 4
Esev3 proton-(2/3) 5 Side leakage electron?
Esev3 proton-(3/3) Shower axis go through dead cell 6
Sum up These shower looks like proton: 1) proton 2) Side leakage electron 3) Shower axis goes through dead cell We can correct 2) and 3) by a new function getCorrectedESEv3(EcalEntry, EcalExit). 7
ECALBDT proton Noise or MIP? 8
Antiproton Uncertainty is dominated by statistical one. 9 By S. Haino, Oct 2013
Current studies Status and Plan [_]Studies from other groups: Cut on TRDLikelihoodRatio>0.7 && EcalBDT<-0.8 To select proton and antiprotons Fit on Data to get charge confusion. Pure sample and low statistics. [_]Plan: Cut on TRD and 2D(ESEv3 and TrkBDT) fit on Data. Higher statistics but more bins to fit. 10
First try Pre-selection from IHEP-MIT study ( Oct. 2013) 1 Full-span track, XY-hit on each tracker plane 1 shower 1 TRD track 4 layers of TOF reconstruction 0.8<QInner<1.4 0.8<TOF <1.2 Tracker external alignments agree ecalbdt<-0.8 ECAL-tracker match TRD EPLikelihoodRatio>0.7 Above cutoff 11
First try My Selection: 1 shower 4 layers of TOF reconstruction 0.8<QInner<1.4 0.8<TOF <1.2 ecalbdt<-0.8 ECAL-tracker match TRD EPLikelihoodRatio>0.7 Above cutoff ECALEntry&Exit cut Q_tofu<1.5 Other patterns except fullspan. Need to do: 1 Full-span track XY-hit on each tracker plane 1 TRD track Tracker external alignments agree Magnet temperature correction 12
First try- No full span Without full span or new alignment, the contamination from proton is too large. Waiting for the new alignment. Only using full-span. 13
First try- full span Alignment, temperature correction and 1 TRD track needed. 14
TrkBDT-Proton(on going) TB 400GeV Protons: 15
Other plans Develop multi-valued Decision Trees to count protons, antiprotons and electrons.(at least 3 months) Use other tools to cross check.( ex. TSplot suggested by Li). 16
