Data used in the analysis

168318 168341 168362 168461 168826 169045
168322 168356 168458 168514 169035 169091
168325 168361 168460 168777 169040 169099

# of events in the analysis

• EMCal trigger (all the centrality) ; 250,000
• Central trigger ; 2,000,000

Energy distribution

Energy distribution in EMCal trigger

• (action) Check exotic cluster

Comparison Max tower Energy and All cluster in EMCal trigger

• Maximum tower energy distribution is identical with cluster energy distribution without any trigger cluster selection above the threshold.
• In most central, these distributions are different above the threshold

Comparison between EMCal trigger (Central) and Central trigegr

• Cluster energy distribution with the EMCal trigger in the most central (0-10%) is well match with the distribution with the central trigger after arbitrary scale above the threshold.

• (action) compare with narrow centrality

E/p

Central trigger

• Large hadron contamination at low pT due to dE/dx selection. Need to check.

• (action) show the fitting
• (action) first fit the narrow gauss to find peak and width

E/p peak position & resolution

• peak position ; ~ 7 % higher than unit

Raw Electron yields

Central trigger (uncorrected background)

• Uncorrected background hadron correction

• (action) subtracting background
• (action) compare with cluster energy distribution

Next to do

• shower shape
• track matching
• Occupancy
• phi and eta dependence of PID (E/p, dE/dx)
• Increase statistics to see electrons in EMCal trigger

-- ShingoSakai - 22-Feb-2012