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HES-HKS & KaoS meeting

HES-HKS & KaoS meeting. T.Maruta. D.Doi. Toshi Gogami 7/Oct/2011. A.Chiba. S.N.Nakamura. S.Nagao. JLab Hall-C counting room, 12/Oct/2009. Contents. Analysis The tracking efficiencies of HKS KDC1 x dependence T he new tracking code effect KDC1 x dependence

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HES-HKS & KaoS meeting

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  1. HES-HKS & KaoS meeting T.Maruta D.Doi Toshi Gogami 7/Oct/2011 A.Chiba S.N.Nakamura S.Nagao JLab Hall-C counting room, 12/Oct/2009

  2. Contents • Analysis • The tracking efficiencies of HKS • KDC1 x dependence • The new tracking code effect • KDC1 x dependence • ECT* in Trento, Italy (9/26 – 9/30)

  3. The background events of the HKS e+ e- Efficiency is lower for the low momentum side ? KDC1 KDC2 Dipole exit e+ e+ e- For the whole acceptance of the HKS

  4. The HKS Tracking efficiencies(The Difference between Low & high momentum side) Momentum dependence • Mesh study 77124 ( 52Cr target ) 5 × 5

  5. A effect of the new tracking code(HKS single analysis) Before 77120 – 77124 (52Cr target) A pure effect of the improvement of the tracking code • All entries  71.1% increased • Kaons  75.5% increased Improved uniformly for the HKS acceptance After

  6. ECT* Trento Venezia Verona Mirano Roma

  7. A talk in Trento • 29/Sep/2011 afternoon Tracking procedure for high multiplicity data of hypernuclear spectroscopy experiment at JLab Hall-C ( 10min + 5min ) [pdf] [pptx] • Question & Comment • Is it sure that the origin of the background events for both H2O and 52Cr targets come from pair creation process ? • This code can be used for the Mainz experiment.

  8. Summary and To do Summary • Analysis • Tracking efficiency of the HKS • There may be momentum dependence. • The new tracking code (G-Tracking code) improved the number of events for HKS acceptance uniformly. • ECT* / JSPS core to core meeting in Trento, Italy • Strange Hadronic Matter (26/Sep/2011 – 30/Sep/2011) To Do • E01-011 • Enge GEANT • E05-115 • Momentum dependence of the HKS tracking efficiency • HKS b.g. rate study by GEANT simulation • Rates of the each wires of the drift chambers. ( ~a few 100 [kHz] ? Or more ? ) • Miss identification efficiency estimation by Doi code

  9. END 30/Sep/2011, Trento, Italy

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