最近 8/20 - 8/25 fb20 in fukuoka, japan – electro-production of k + Λ at jlab hall-c ...
TRANSCRIPT
HES-HKS & KaoS meeti ng
Toshi Gogami20/Sep/2012
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
Contents
• Λ , Σ0
– 2 bins in angular acceptance
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/c2
p(e,e’K+)Σ0
~1.8MeV (FWHM)Δm = 73 ± 47 keV/c2
JLab E05-115CH2, ~ 450 [mg/cm2]~ 2.0 [μA]~ 38 [hours]
Preliminary
HKS angular acceptance
Region 1 Region 2
θLabK at target
0.1 > θLabK 0.1 < θLab
K < 0.2
Solid angles of HKS
9th polynomial functions
Λ acceptance
Region 1
Region 2
SIMULATION
SIMULATION
SIMULATION
~ 8.5 msr
Missing mass spectra of polyethylene target
Region 1 Region 2
Missing mass spectra of polyethylene target
Region 2Region 1
Σ0
~2.2 msrΛ~5.7 msr
Σ0
~5.7 msr
Λ~2.9 msr
~ 300 nb/sr ~ 200 nb/sr
summary
• Doing further analysis