1. HBD Meeting 2010 / 11/ 24 Katsuro 1

2. confirmation plan for HBD simulation performances 2 HBD charge distribution Red: merged cluster Blue: separated cluster important features of HBD – compare HBD charge distribution for single electrons – cluster size distribution for single electrons need to check these distributions

3. clustering algorithm 3 HBD charge [p.e.] seed pad seed pad seed pad Clustering Algorithm make a cluster with seed pads add neighbor pads to the cluster cluster charge is the sum of pad charges seed pad: pad with large charge (> 3p.e.) SNSN

4. Run Selection and Electron Cut reject runs including many dead pads on HBD – gain looks reasonable electron cut – abs(bbc_z) < 20cm – quality==31|51|63 – n0>=2 – e/p cut – ecore>0, mom>0 – abs(emcsdphi_e)<4, abs(emcsdz_e)<4 – prob>0.01 hbd association cut – abs(hbdsdphi) < 3.5 – abs(hbdsdz) < 3.5 4

5. extraction of single-electron events from data 5 photonic electron single e cluster merged cluster Use electron pairs in Dalitz region (mass < 0.135GeV/c 2 ) – less background many of these events produce merged clusters on HBD, but other fractions produce single electron clusters on HBD photonic electron (single e like event) Use these event for the comparison

6. HBD cluster charge distribution 6

7. HBD charge (data vs. simulation) (cluster size == 1, East) 7 Black: data Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

8. HBD charge (data vs. simulation) (cluster size == 1, West) 8 Black: data Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

9. HBD charge (data vs. simulation) (cluster size == 2, East) 9 Black: data Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

10. HBD charge (data vs. simulation) (cluster size == 2, West) 10 Black: data Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

11. HBD charge (data vs. simulation) (cluster size == 3, East) 11 Black: data Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

12. HBD charge (data vs. simulation) (cluster size == 3, West) 12 Black: data Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

13. HBD charge (data vs. simulation) (cluster size == 4, East) 13 Black: data Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

14. HBD charge (data vs. simulation) (cluster size == 4, West) 14 Black: data Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

15. HBD charge (data vs. simulation) (cluster size == 5, East) 15 Black: data Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

16. HBD charge (data vs. simulation) (cluster size == 5, West) 16 Black: data Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

17. HBD cluster size distribution 17

18. HBD size distribution (East) 18 Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

19. HBD size distribution (West) 19 Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

20. center region cut select tracks passing good region on HBD 20 accept region accept region 26.5cm 22.9cm 18.0cm 14.0cm

21. HBD size distribution center region cut (East) 21 Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation low eff. low stat. not stable HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

22. HBD size distribution center region cut (West) 22 Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation low stat. HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

23. change offline pad charge threshold apply new offline pad charge cut – pad charge > 3 p.e. – (old threshold: 1p.e.) reject online threshold effect reject inhomogeneous efficiency on pad online threshold 23

24. HBD size distribution cell charge cut (>3p.e.) (East) 24 low eff. low stat. not stable Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

25. HBD size distribution cell charge cut (>3p.e.) (West) 25 low stat. Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

26. HBD size distribution. (East) center cut && cell charge cut (>3p.e) 26 low eff. low stat. not stable Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

27. HBD size distribution (West) center cut && cell charge cut (>3p.e.) 27 low stat. Black: Dalitz data (single e cluster) Green: J/psi data (unlike - like) Red: simulation HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

28. HBD cell charge distribution creating HBD pad charge distribution for single electron track seed pad seed pad seed pad reconstructed electron track e HBD cell charge entry/#{e track} fill cell charge to histo scaled by the number of e tracks  integral is equivalent to average cluster size 28

29. HBD cell charge distribution (East) Black: data Green: J/psi (unlike – like ) Red: simulation low eff. low stat. not stable 29 HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

30. HBD cell charge distribution (West) Black: data Green: J/psi (unlike – like ) Red: simulation low stat. 30 HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

31. center region cut select tracks passing good region on HBD 31 accept region accept region 26.5cm 22.9cm 18.0cm 14.0cm

32. HBD cell charge distribution center region cut (East) Black: data Green: J/psi (unlike – like ) Red: simulation low eff. low stat. not stable 32 HBD Sect 1 SHBD Sect 1 N HBD Sect 2 SHBD Sect 2 N HBD Sect 3 SHBD Sect 3 N HBD Sect 4 SHBD Sect 4 N

33. HBD cell charge distribution center region cut (West) Black: data Green: J/psi (unlike – like ) Red: simulation low stat. 33 HBD Sect 7 SHBD Sect 7 N HBD Sect 8 SHBD Sect 8 N HBD Sect 9 SHBD Sect 9 N HBD Sect 10 SHBD Sect 10 N HBD Sect 11 SHBD Sect 11 N

34. discussion HBD cluster charge distribution is roughly consistent – but cluster size distributions seem not to be consistent gain-adjustment makes a consistent in cluster-size distributions of data and simulation ??? – HBD simulator Cherenkov photon generate photo-electrons on CsI generate a gain with a probability distribution (exp (+gaus)) for each photo-electron – changing exponential slope (=gain) ??? 34