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Progress on ERT  0 efficiency study

Progress on ERT  0 efficiency study. Spin PWG June 6,2002 LVL-1 meeting June 14,2002 Analysis meeting June 14,2002 Kensuke Okada. Plan.  0 ( 2 gamma) efficiency. MC. gamma Edep. Trigger tile response + mask. Single gamma efficiency. Trigger tile efficiency. Single gamma

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Progress on ERT  0 efficiency study

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  1. Progress on ERT 0efficiency study Spin PWG June 6,2002 LVL-1 meeting June 14,2002 Analysis meeting June 14,2002 Kensuke Okada

  2. Plan 0 (2 gamma) efficiency MC gamma Edep Trigger tile response + mask Single gamma efficiency Trigger tile efficiency Single gamma efficiency from min-bias events Test beam Electron etc Data 0 efficiency (Just for confirmation) Today’s topic

  3. Data selection microDSTs : CCJ pro23 run40082~run40292 (about 1900 files) Events : scaled min-bias (NTC||BBC) events EMC cluster : prob_photon>0.02. Maximum ecore in SM

  4. Histogram of ecore sector by sector 106 Some sectors have large energy deposit. What are those? W0 All cluster With 2x2 trigger bit 103 1 3 5 ecore [GeV] W0 E0 W2 E2 W3 E3 W1 E1

  5. Hot channels? Over 1GeV deposit cluster position W0 E0 Definition #hits_hottower > {#hits_sector_average +5*sqrt(#hits_s_ave)} W1 E1 Sector #hot tower W0 4 W1 14 W2 7 W3 293 E0 107 E1 85 E2 6 E3 22 W2 E2 W3 E3

  6. EMC warn map? From Run40083-0010 CCJ pro23 W0 E0 position of (warnmap!=0) E1 W1 Only edge in PbSc It is not helpful. W2 E2 W3 E3

  7. After masking hot towers E2 W2 Red curve :2x2trigger bit on E3 W3 E0 W0 It looks better even for PbGls (E0,E1) E1 W1

  8. Efficiency 16/18 21/32 E0 W0 3 ecore[GeV] 25/32 11/18 W1 E1 Maximum point from trigger mask info

  9. Efficiency 18/18 11/18 E2 W2 3 ecore[GeV] 17/18 9/11 ~9/12 W3 E3 Saturation points seems reasonable

  10. 2x2 [GeV/tile] Fast MC (by Sasha.B) W0,W1,W2 total Photon pT Fast MC data 0 pT Input : tile efficiency of one gaussian fit Check trigger bit for the higher energy photon Result : photon efficiency and 0 efficiency. They agree well. The mask effect appears. Fast MC data

  11. Summary 2x2high trigger single gamma efficiency was studied. There are several hot channels. Sasha’s fast MC works • To get pure photon cluster • Laser event rejection,EMCal tof check, charged particle veto, Vertex cut • Checking existing warn-map  doesn’t work • same study for 2x2low • Pass over the ppDST (run together with QA) • Hopefully I can get tile by tile characteristic • Correlation between triggers.

  12. Backups

  13. 2 Edge clusters 12 E0 W0 W1 E1

  14. 2 Edge clusters 12 E2 W2 E3 W3

  15. 2 Center clusters 12 E0 W0 E1 W1

  16. 2 Center clusters 12 W2 E2 W3 E3

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