1. HES-HKS & KaoS meeting 24/Feb/2014 Toshi Gogami

2. Contents 12 Λ B cross section Comparison with Motoba-san’s calculation Acceptance Linearity after matrix tuning (blind analysis)

3. Differential cross section of 12 Λ B by Motoba-san DWIA, E γ = 1.5 GeV

4. Differential cross section predicted by Motoba-san Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - ) θ Lab γK [degree] [nb/sr]

5. Angular distribution in simulation (θ Lab γK ) SIMULATION Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - ) θ Lab γK [degree] Normalized intensity θ Lab γK [degree] [Counts]

6. Predicted cross section in our acceptance SIMULATION Mean values θ Lab γK [degree] [nb/sr] Value used for comparison !!

7. Cross-section comparison θ γK [degree]Experimental results [nb/sr] Motoba’s calculation [nb/sr] E05-1156.883 ± 3 ± sys. error75 E01-0115.8 (hand calc.)101 ± 4.2 (+ 38 – 31)85

8. Acceptance

9. Events for acceptance comparison CH 2 target Λ (± 8 MeV) ( One of spectra during blind analysis ) Missing mass [GeV/c 2 ] [Counts / (200keV/c 2 )]

10. HES side

11. HES side (log scale) Out of range X [cm] Y [cm] [Counts]

12. HES side (linear scale) Out of range X [cm] Y [cm] [Counts]

13. HKS side

14. HKS side (log scale) X [cm] Y [cm] X [cm] Y [cm] [Counts]

15. HKS side (linear scale) X [cm] Y [cm] X [cm] Y [cm] [Counts]

16. Linearity after tuning  systematic error

17. Differential non-linearity SIMULATION ΔM HYP (M - M gen )

18. Differential non-linearity Missing mass [GeV/c 2 ]

19. Differential non-linearity Missing mass [GeV/c 2 ]

20. Differential non-linearity

22. Differential non-linearity (10B, 12C, 52Cr)

23. 他 Tuning with 7 Λ He Li 標的 写真 : 黒い  すでに窒化しているっぽい Blind analysis Differential non-linearity Another pattern of distortion 解析 Finalizing 52 Λ V どうするか

24. Backup

25. Sample used for cross section study Assumed binding energy of 11.37 MeV SIMULATION

26. Differential cross section predicted by Motoba-san Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - ) θ Lab γK [degree] [nb/sr]

27. Angular distribution in simulation (θ Lab γK ) SIMULATION Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - ) θ Lab γK [degree] Normalized intensity θ Lab γK [degree] [Counts]

28. Predicted cross section in our acceptance SIMULATION Mean values θ Lab γK [degree] [nb/sr] Value used for comparison !!

29. Cross-section comparison θ γK [degree]Experimental results [nb/sr] Motoba’s calculation [nb/sr] E05-1156.883 ± 3 ± sys. error75 E01-0115.8 (hand calc.)101 ± 4.2 (+ 38 – 31)85

30. Differential cross section by Motoba-san Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - )

31. Angular distribution (θ Lab γK ) SIMULATION

32. Angular distribution (θ Lab γK ) SIMULATION Motoba-san’s calc. 12 Λ B g.s. (1 -, 2 - ) θ Lab γK [degree] Normalized intensity

33. Predicted cross section in our acceptance SIMULATION 7.4 degree 6.8 degree 74.7 nb/sr