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Status of the Simulations

Status of the Simulations. Detector Issues (MVD  Andrei Sokolov) Implementation of a TPC ToF for PID Modified EMC Counting rates and PID in the muon detectors Cone shaped Dipole Magnet? Analysis Issues Hyperon reconstruction LoI D*. Implementation of a TPC for the TS tracking.

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Status of the Simulations

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  1. Status of the Simulations • Detector Issues • (MVD  Andrei Sokolov) • Implementation of a TPC • ToF for PID • Modified EMC • Counting rates and PID in the muon detectors • Cone shaped Dipole Magnet? • Analysis Issues • Hyperon reconstruction • LoI • D* James Ritman Univ. Giessen

  2. Implementation of a TPC for the TS tracking Open questions: 30 ms drift time! Ion feedback beam TUM James Ritman Univ. Giessen

  3. PID with the ToF Barrel Time resolution of 100 ps assumed beam JLU GI James Ritman Univ. Giessen

  4. JLU GI b Momentum [GeV/c] Momentum vs Velocity James Ritman Univ. Giessen

  5. JLU GI Mass2 from P and b P < 1.0 GeV/c James Ritman Univ. Giessen

  6. Modifications to the EMC Current design Modified design Larger overlap needed at small polar angles (cylindrical geometry) longer crystals needed at forward angles (higher gamma energy) RUB James Ritman Univ. Giessen

  7. RUB Improved efficiency and energy resolution (p07.96.9 MeV, h 19.7  17.4 MeV) James Ritman Univ. Giessen

  8. RUB Improved Efficiency Through Reduced Split-off Probability James Ritman Univ. Giessen

  9. Counting Rate in Muon Detector (background events) p = 4.068 GeV/c p = 6.6 GeV/c JLU GI James Ritman Univ. Giessen

  10. JLU GI Muon ID for “real” muons Drf Dz c2 Dt James Ritman Univ. Giessen

  11. JLU GI Muon ID for Background James Ritman Univ. Giessen

  12. PID Distributions background muons JLU GI James Ritman Univ. Giessen

  13. Muon Detectors in the FS • … GSI docu server was down on the weekend… GSI James Ritman Univ. Giessen

  14. Cone Shaped Dipole Magnet?? JINR James Ritman Univ. Giessen

  15. Flux Density JINR James Ritman Univ. Giessen

  16. Analysis Issues:Hyperon Reconstruction James Ritman Univ. Giessen

  17. 1 2 3 1.116 2.232 GeV/c 3.348 0.2 0.4 GeV/c 0.6 gb pL pTL Single L events JLU GI James Ritman Univ. Giessen

  18. Angular resolution p/m=1 p/m=2 p/m=3 Single L events N.B.: Suppressed zero James Ritman Univ. Giessen

  19. L-L pbeam = 4 GeV/c JLU GI James Ritman Univ. Giessen

  20. Results in the LoI James Ritman Univ. Giessen

  21. Detection of Rare Neutral Channels As an example: hcgg Background: p0g, p0p0 hc:p0g:p0p0 1 :50 :500 Upp / RUB James Ritman Univ. Giessen

  22. Detection of Rare Neutral Channels Comparison with E835 (PLB 566,45) PANDA Upp / RUB James Ritman Univ. Giessen

  23. Dimuon Spectrum in p+Cu • Beam momentum “on resonance” • Full background simulations (result scaled up) • Muons from J/Y have high Pt • J/Y has low Pt (coplanar) J/Y GSI James Ritman Univ. Giessen

  24. Open Charm pp DD DKpp „no backgroundevents added“ Mass Resolution ~ 10 MeV/c2 JLU GI James Ritman Univ. Giessen

  25. Open Charm As an example of the Pbar P  Y(3770)  DD Analysis Plot MDD – MD – MD + 2x1869MeV raw S/B ~ 10-7 JLU GI James Ritman Univ. Giessen

  26. mm cut GeV Efficiency ~ 65% (45%) GeV JLU GI James Ritman Univ. Giessen

  27. Summary • More detailed description of many detectors • Analysis methods improved • (code distribution tools [Pavia]) • LoI prepared • D* analysis • Hyperons • More on the Benchmark Channels in Klaus Peters’ talk James Ritman Univ. Giessen

  28. Longitudinal Scale up by x10! 0.15 < Vz < 5 mm signal DPM background Vertex Distributions GEANT4 Transverse D meson signal DPM background James Ritman Univ. Giessen

  29. DD Missing Mass signal DPM background N.B. different x scale | Mmiss2|< 0.001 GeV2 (tight cut) James Ritman Univ. Giessen

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