Comparison of the DIRC performance for positive and negative particles.
- geometrical reconstruction
- with per-pmt/chromatic corrections
- [3.4, 3.6] GeV/c pions and kaons from rho and phi events
- track selection: [31,35] bars (upper OB), [7,11] bars (lower OB); x from [-20,20] cm range
- calculated error of the separation power is +/- 0.1 s.d.
Upper OB:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_up/wall_m1_m1_3d5_0d0_P.png)
Separation power of geometrical reconstruction. Negative:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_minus/lndiff_-1_-1_3.5_0.0.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_plus/lndiff_-1_-1_3.5_0.0.png)
Photon yield comparison (27 vs 27): Negative
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_up/nph_m1_m1_3d5_0d0_M.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_up/nph_m1_m1_3d5_0d0_P.png)
SPR. Negative:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_minus/angle_-1_-1_3.5_0.0.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_plus/angle_-1_-1_3.5_0.0.png)
Simulation. Negative:
![](/~rdzhigad/data/gluex/charge/lndiff_simM_m1_m1_3d5_0d0.png)
Positive:
![](/~rdzhigad/data/gluex/charge/lndiff_simP_m1_m1_3d5_0d0.png)
Lower OB:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/wall_m1_m1_3d5_0d0_P.png)
Separation power of geometrical reconstruction. Negative:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/lndiff_m1_m1_3d5_0d0_M.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/lndiff_m1_m1_3d5_0d0_P.png)
Photon yield comparison (24 vs 24): Negative
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/nph_m1_m1_3d5_0d0_M.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/nph_m1_m1_3d5_0d0_P.png)
SPR: Negative
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/angle_m1_m1_3d5_0d0_M.png)
Positive:
![](/~rdzhigad/data/gluex/charge/reco_lut_02_scan_sel_05_down/angle_m1_m1_3d5_0d0_P.png)
Separation vs bar number; p = 3.5 +/- 0.2 GeV/c :
![](/~rdzhigad/data/gluex/charge/draw_scan_b/sep_cut.png)
Separation vs bar number vs charge vs Left/Right tracks; statistics is sampled for every 3 bar; p = 3.5 +/- 0.2 GeV/c :
![](/~rdzhigad/data/gluex/charge/draw_scan_b/sep_cut_lr.png)
Example of charge particle hit distribution for bar 32 (31,32,33) right:
![](/~rdzhigad/data/gluex/charge/draw_scan_b/wall_32_m1_3d5_0d0_MR.png)
Example of charge particle hit distribution for bar 26 (25,26,27) left:
![](/~rdzhigad/data/gluex/charge/draw_scan_b/wall_26_m1_3d5_0d0_M.png)