Outlook

• Studied E/p and Shower shape with titer matching cut (R<0.003) and wider cut (R<0.02) in the central trigger

General

• trigger selection ; central trigger (centrality 0 - 10 %)
• dE/dx cuts in this analysis is 72 - 90 (see dE/dx vs. E/p)
• E/p cut for electron selection ; |nSIgma|<2

E/p with matching cuts

matching R<0.003

matching R<0.02

Shower shape with matching cuts

• Electron candidate

matching R<0.003

M02

Cell

Disp

matching R<0.02

M02

Cell

Disp

Shower Shape Comparison (R<0.003 vs. R<0.02)

• Electron candidate
• required # of matched track = 1 / cluster
• Comparison between R<0.003 cut and R<0.02 cut
• Distributions are normalized with the # of entries

# of cells

M02

Disp

Summary

• R<0.02 cut result have more # of cells / cluster than R < 0.003
• R<0.02 cut result make a longer tail in shower shapes (M02, dispersion)

-- ShingoSakai - 16-Mar-2012