1. HLAB MEETING ~ Status Report ~ Toshiyuki Gogami 14Jan2014

2. Contents Missing mass status 12 C, 10 B and 7 Li target About 7 Li target

3. 炭素標的

4. 12 C(e,e’K + ) 12 Λ B

5. 12 C target Remarks  Efficiencies are different between low and high current data  Two set of HES collimator positions are used.

6. Differential cross section of 12 C(γ*,K + ) 12 Λ B Peak-B [MeV]Number of event Cross section [nb/sr] 1-11.40 ± 0.03657±2683 ±3 3-8.37 ± 0.10135±1117 ±1 4-5.15 ± 0.18118±1115 ±1 5-1.67 ± 0.23116±1114 ±1 2-0.38 ± 0.04631±2582 ±3 6+0.82 ± 0.09240±1531 ±2 Only statistical errors ( FWHM ~ 0.89 MeV )

7. 12 Λ B comparison Experiment-B Λ [MeV]Cross section [nb/sr] E05-115-11.40 ± 0.0383 ± 3 E01-011-11.40 ± 0.01 ± 0.04101 ± 4.2 (+ 38 – 31) E89-009-11.52 ± 0.35140 ± 17 ± 18 Emulsion-11.37 ± 0.06N/A Experiment-B Λ [MeV]Cross section [nb/sr] E05-115-0.38 ± 0.0482 ± 3 E01-011-0.41 ± 0.01 ± 0.1394 ± 4.0 ±35 E89-009-0.49 ± 0.16N/A

8. ホウ素標的

9. 10 B(e,e’K + ) 10 Λ Be

10. 10 B target

11. Differential cross section of 10 B(γ*,K + ) 10 Λ Be Peak-B [MeV]Number of event Cross section [nb/sr] 1-8.66 ± 0.08141±1211.6 ±0.9 2-7.81 ± 0.2351±74.3 ±0.7 3-6.08 ± 0.09139±1211.8 ±1.0 4-5.03 ± 0.1478±96.5 ±0.7 5-1.98 ± 0.10156±1313.0 ±0.9 6-0.11 ± 0.16123±1110.0 ±0.8 72.23 ± 0.07188±1415.9 ±1.1 811.14± 0.1394 ± 107.8 ±0.8 ( FWHM ~ 0.8 MeV )

12. Comparison with old data MeV

13. リチウム 標的

14. 7 Li(e,e’K + ) 7 Λ He

15. 7 Li target

16. Differential cross section of 7 Li(γ*,K + ) 7 Λ He Peak-B [MeV]Number of event Cross section [nb/sr] 1-5.28 ± 0.14482±2212.4 ±0.5 2-3.50 ± 0.14271±167.0 ±0.4 ( FWHM ~ 1.3 MeV )

17. 7 Li target Remarks  Target thickness  ELOG  Weight and area: 331.2 mg/cm 2  Nitride etc.?  Thickness and density: 207 mg/cm 2 Nitriding test Check Brems. Rate in HES Etc. Need to be done !!!!

18. 7 Li target Li : 0.534 g/cm 3  Li 3 N : 1.27 g/cm 3  LiOH : 1.46 g/cm 3 ( アポロ )  Li 2 CO 3 : 2.11 g/cm 3 Li 何かほかの 1.3: 0.160235 0.410859 1.4: 0.141732 0.363416 1.5: 0.12706 0.325795 2.0: 0.0837244 0.214678 3.9 mm 0.4 ~ 0.8 mm

20. Backup

21. 52 Cr(e,e’K + ) 52 Λ V

22. 9 Be(γ*,K + ) 9 Λ Li (only figure)

23. Differential cross section of 10 B(γ*,K + ) 10 Λ Be Peak-B [MeV]Number of event Cross section [nb/sr] 1-8.66 ± 0.08141±1211.6 ±0.9 2-7.81 ± 0.2351±74.3 ±0.7 3-6.08 ± 0.09139±1211.8 ±1.0 4-5.03 ± 0.1478±96.5 ±0.7 5-1.98 ± 0.10156±1313.0 ±0.9 6-0.11 ± 0.16123±1110.0 ±0.8 72.23 ± 0.07188±1415.9 ±1.1 811.14± 0.1394 ± 107.8 ±0.8 ( FWHM ~ 0.8 MeV ) -8.84 without CSB -8.76 with CSB Hiyama’s calc. Motoba’s calc.

24. 7 Λ He comparison (FWHM ~ 1.3 MeV) -5.36 without CSB -5.16 with CSB Peak-B [MeV]Number of event Cross section [nb/sr] 1-5.28 ± 0.14482±2212.4 ±0.5 2-3.50 ± 0.14271±167.0 ±0.4 ( FWHM ~ 1.3 MeV ) Hiyama’s calc.

25. 10 B target

26. 制動放射起因電子の計数率

27. Missing mass estimation by the full-modeled Monte Carlo simulation

28. Achievable resolution Hyperon Hypernucleus Target [mg/cm 2 ] IntrinsicMass offset due to energy loss Matrix z- dependence (B) Simulated total resolution (A) Achievable resolution (A-B) Present work (Toshi’s anlysis) ΛCH 2 (450)8301000730210013801600 7 Λ He 7 Li (184.0)44026055013007501300 9 Λ Li 9 Be(188.1)440260170740560Not yet 10 Λ Be 10 B (56.1)4308040590550800 12 Λ B 12 C (87.5)43013080620540890 52 Λ V 52 Cr (134.0)43016030630600Not yet Part of the z-dependence (Λ, Σ 0 and 12 Λ B) is absorbed by the matrices in a matrix tuning.  Effects of z-dependence absorption for other hypernuclei are not trivial.  Blind analysis ( FWHM, Unit: keV )

29. Flow chart Initial matrices (not distorted) Tuned matrices Tune Λ, Σ 0 and hypernucei Absorbing effects of z-dependence Asymmetry shape Etc. Λ + B.G. Σ 0 + B.G. 12 Λ B s-shell Generated

30. Results FWHM [keV] ΔMM [keV] Mean value displacement Width ΔMM < 130 keV 500 ~ 700 keV ( 12 Λ B, 10 Λ B, 52 Λ V) ~ 1000 keV ( 7 Λ He) ~ 1500 keV (Λ, Σ 0 ) Achieved simultaneously ! Λ + B.G. Σ 0 + B.G. 12 Λ B s-shell No matrix distortion + Achievable resolutions

31. Response function