User name X. Zheng
Log entry time 22:37:41 on July 3,2001
Entry number 65614
keyword=Analysis dependence on 2D PID cutHere the raw asymmetries from quasi offline analysis are plotted vs. 2D PID cut in pion rejectors and shower/preshower.
A cut in cherenkov adc_sum_t has been used in this analysis, (300, 10000) for both arms, which has > 99.8% pion rejection efficiency.
Figure 1: left arm
Figure 2: right arm
Top: Longitudinal raw asymmetry vs. 2D cut in pion rejectors (or shower/preshower). Horizontal axis is the cut in 1st layer pion rejector (or preshower) related to each 2D cut. Four configurations of beam and target half waveplate are plotted;
Bottom: Same thing for transverse raw asymmetry. Two configurations of beam half waveplate are plotted;
Present conclusion:
Quasi offline analysis is not sensitive to 2D PID cuts in pion rejectors (or shower/preshower). Will keep the original 2D cuts.
FIGURE 1
FIGURE 2
