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HES-HKS & KaoS meeting

HES-HKS & KaoS meeting. 1/ May /2012 Toshi Gogami. 30Apr2012, Yagiyama shrine. Contents. Λ/Σ 0 cross section from CH 2 target runs Calculation of VP flux (GEANT4 simulation) Found bugs in seed file generator Angles are forwarder than that should be.

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HES-HKS & KaoS meeting

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  1. HES-HKS & KaoS meeting 1/May/2012 Toshi Gogami 30Apr2012, Yagiyama shrine

  2. Contents • Λ/Σ0 cross section from CH2 target runs • Calculation of VP flux (GEANT4 simulation) • Found bugs in seed file generator • Angles are forwarder than that should be

  3. The number of events of Λ and Σ0 JLab E05-115 CH2, ~ 450 [mg/cm2] ~ 2.0 [μA] ~ 38 [hours]  Cross sections VP flux, efficiencies 5532± 75 (Integrated : 5 – 9 MeV/c2) 1434± 39 (Integrated : 72 – 86 MeV/c2)

  4. Bugs HES/ gen/vp/ vpflux.cc

  5. Difference a few % HES angular acceptance Simulation

  6. Virtual photon flux ROOT File : ./root2/vp2344all_H_small_merged.root The number of acc. events : 7260 +- 85.2056 VP flux [ 1/electrons ] : 1.97047e-05 +- 2.33026e-07 The number of electrons : 1.7545e+18 Total number of VP : 3.45719e+13 Simulation 少！ (cut conditions?) Dir : /data/8b/gogami/HAKO/svnroot/simulation/geant4/trunk/HES/ana/cs_ch2

  7. HYP2012 & FB20 • HYP2012 (http://www.phys.kyushu-u.ac.jp/fb20/venue.html) • Registration (by 15th Sep) is done • FB20 (http://www.phys.kyushu-u.ac.jp/fb20/venue.html) • Registration (by 18th Aug) is done • Abstract submission (by 15th May)

  8. Preparation for HES/HKS collaboration meeting on 9-11/May • E01-011(やる) • TOSCA + GEANT • Cross sections of Λ/Σ0 (今日明日) • The number of events • VP flux • Efficiencies • Analysis strategy for the high multiplicity data (あるもので発表)

  9. END 30Apr2012, 仙台の朝

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