TOF Fiducial Cut on 325 +/- 25 MeV/c (++ Field) Real Data Simulation South Positive North Positive South Positive North Positive South Negative North Negative South Negative North Negative Unnecessary cutting of positive particles below 1620 (both North and South) ? November 22, 2005 TOF Fiducial Cut Check

TOF Fiducial Cut on 325 +/- 25 MeV/c (++ Field) Sim (red line) vs Real (black points) After Cuts Sim (red line) vs Real (black points) Before Cuts South Positive North Positive South Positive North Positive South Negative North Negative South Negative North Negative Positive particle shape is not much improved using fiducial cuts Negative particle shapes were acceptable before cuts, little change after November 22, 2005 TOF Fiducial Cut Check

Explanation and Summary Slide 1 Explanation Left side is for real data and right side is for simulation: 325 +/- 25 MeV/c Real data are for all good quality tracks into TOF, first half of ++ field runs Simulation data used pions, same temperature spectrum as in real data Black line histogram is before cuts, red histogram (mostly on top of black) is for the after cuts using fiducial cut file from Dipali and Debsankar Black filled histogram is for the particles eliminated by the cuts Slide 1 Conclusion Unnecessary cutting of positive particle yield below 162 (see also slide 2) Slide 2 Explanation Same input as slide 1 but simulation and real results are overlaid Normalization is based on the total entries ratio (only shapes are relevant) Left side is before the fiducial cuts, right side is after the fiducial cuts Slide 2 Conclusions Also shows unnecessary cutting for positive particles below 1620 Negative particle shapes are in generally good agreement (only one big hole) Positive particle shapes above 1800 reasonably agreement between MC and Real Positive particle shapes below 1800 not as well reproduced, especially South side November 22, 2005 TOF Fiducial Cut Check

TOF Fiducial Cut on 975 +/- 25 MeV/c (++ Field) Simulation Real Data South Positive North Positive South Positive North Positive South Negative North Negative South Negative North Negative November 22, 2005 TOF Fiducial Cut Check

TOF Fiducial Cut on 975 +/- 25 MeV/c (++ Field) Sim (red line) vs Real (black points) Before Cuts Sim (red line) vs Real (black points) After Cuts South Positive North Positive South Positive North Positive North Negative North Negative South Negative South Negative November 22, 2005 TOF Fiducial Cut Check