Table of contents:

General

  • trigger selection ; central trigger (centrality 0 - 10 %)
  • dE/dx cuts in this analysis is 72 - 90 (see dE/dx vs. E/p)

Energy vs. cell

  • central trigger (0-10%)
Pic_Energy_cell_cent.png
  • EMCal gamma trigger (all centrality)
Pic_Energy_cell_trig.png

dE/dx vs. E/p

Pic_dedx_eop.png

  • Clear correlation between dE/dx and E/p for electrons
  • Applied 72 <dE/dx < 90 in this analysis

E/p vs. matching

E/p vs. del phi

Pic_phi_eop.png

E/p vs. del eta

Pic_eta_eop.png

E/p vs. del R

E/p and del R correlations

Pic_R_eop.png

track matching with E/p cuts

Pic_R_eopSig_v1.png

short Summary

  • most of electron signal ; R < 0.015
  • matching cut R < 0.02 is a reasonable cut

E/p vs. # match tracks / cluster

Pic_Nmatch_eop.png

E/p vs.track matching cut

Pic_eop_Rmatch.png

E/p vs. Shower shape

E/p vs. Ncell

Pic_Ncell_eop.png

E/p vs. M02

Pic_M02_eop.png

E/p vs. Dispersion

Pic_disp_eop.png

Short Summary

  • requiring Disp < 0.5 reduce hadron contamination at low pT
  • requiring large dispersion or M02 reduce hadron contamination at high pT (need more statistics)
  • There seems like two structures in the correlations (electron and hadron)

Short Summary

  • larger E/p peak if the cluster has more than one matched tracks
  • fraction of the clusters which have more than one matched tracks ; ~ 10-20 %

-- ShingoSakai - 01-Mar-2012

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng Pic_Energy_cell_cent.png r2 r1 manage 15.4 K 2012-03-09 - 12:22 Ssakai  
PNGpng Pic_Energy_cell_trig.png r2 r1 manage 15.8 K 2012-03-09 - 12:22 Ssakai  
PNGpng Pic_M02_eop.png r2 r1 manage 17.4 K 2012-03-02 - 14:22 Ssakai  
PNGpng Pic_Ncell_eop.png r1 manage 12.7 K 2012-03-02 - 11:23 Ssakai  
PNGpng Pic_Nmatch_eop.png r2 r1 manage 12.0 K 2012-03-02 - 14:32 Ssakai  
PNGpng Pic_R_eop.png r1 manage 14.4 K 2012-03-01 - 17:43 Ssakai  
PNGpng Pic_R_eopSig_v1.png r1 manage 16.6 K 2012-03-05 - 16:27 Ssakai  
PNGpng Pic_dedx_eop.png r1 manage 21.7 K 2012-03-01 - 17:31 Ssakai  
PNGpng Pic_disp_eop.png r2 r1 manage 15.6 K 2012-03-02 - 14:22 Ssakai  
PNGpng Pic_eta_eop.png r1 manage 14.3 K 2012-03-01 - 17:40 Ssakai  
PNGpng Pic_phi_eop.png r1 manage 16.9 K 2012-03-01 - 17:40 Ssakai  
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Topic revision: r7 - 2014-06-09 - ShingoSakai
 
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