2. 最近 8/20 - 8/25 FB20 in Fukuoka, Japan – Electro-production of K + Λ at JLab Hall-C  Proceedings ( in this month ) 8/27 – 8/29 SNP12 in Osaka, Japan – No presentation. 9/2 – 9/7 Tours2012 in Black Forest, Germany – (poster) Lambda hypernuclear spectroscopy at JLab Hall-C 9/11 – 9/14 JPS meeting in Kyoto, Japan – JLab における高品質電子ビームを用いたラムダハイパー核分光実験の解析状況 10/1 – 10/6 HYP, JSPS Core to Core meeting in Barcelona, Spain – Lambda hypernuclear spectroscopy up to medium heavy mass number at Jefferson Lab 資料 on Wiki  http://lambda.phys.tohoku.ac.jp/~db/mediawiki/index.php/%E7%99%BA%E8%A1%A8%E8%B3%87%E6%96%99 http://lambda.phys.tohoku.ac.jp/~db/mediawiki/index.php/%E7%99%BA%E8%A1%A8%E8%B3%87%E6%96%99

3. Contents Λ, Σ 0 – 2 bins in angular acceptance

4. K + Λ electro-production JLab E05-115 (HES-HKS) 192±6±89 [ nb / sr ] p(e,e’K + )Λ ~1.8MeV (FWHM) Δm = 19 ± 17 keV/c 2 p(e,e’K + )Σ 0 ~1.8MeV (FWHM) Δm = 73 ± 47 keV/c 2 JLab E05-115 CH 2, ~ 450 [mg/cm 2 ] ~ 2.0 [μA] ~ 38 [hours] Preliminary

5. HKS angular acceptance Region 1 Region 2 θ Lab K at target 0.1 > θ Lab K 0.1 < θ Lab K < 0.2

6. Solid angles of HKS 9 th polynomial functions Λ acceptance Region 1 Region 2 SIMULATION ~ 8.5 msr

7. Missing mass spectra of polyethylene target Region 1 Region 2

8. Missing mass spectra of polyethylene target Region 2 Region 1 Σ 0 ~2.2 msr Λ ~5.7 msr Σ 0 ~5.7 msr Λ ~2.9 msr ~ 300 nb/sr ~ 200 nb/sr

9. summary Doing further analysis