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γ + d → p + p + π - Analysis

γ + d → p + p + π - Analysis. Y.C.Han@NKS2 Meeting Jan10, 2008. Contents. Energy deposit Correction Select/Cut Conditions. Energy Deposit Correction. Motivation: get more accurate kinematics p/pi energy loss in IH. bg 0.25~1.6 for proton, 0.5~6 for pion. Energy deposit correction.

amery-hendricks
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γ + d → p + p + π - Analysis

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  1. γ+ d → p + p + π-Analysis Y.C.Han@NKS2 Meeting Jan10, 2008

  2. Contents • Energy deposit Correction • Select/Cut Conditions

  3. Energy Deposit Correction • Motivation: get more accurate kinematics • p/pi energy loss in IH bg 0.25~1.6 for proton, 0.5~6 for pion

  4. Energy deposit correction Event Select with loose cut Particle E/p from DC Energy deposit Correction Event Select with tight cut Analysis W/ Correction Energy Deposit Correction Method

  5. Event Select

  6. Event Select

  7. Event Select

  8. Event Select

  9. Appendix-3 Event Select Condition • Time: |IH-TagF| <2.5nsec; • 2TrVertex: Track Distance<1.5 cm; • 3TrVertex: Triangle length<3.0 cm; • 3TrVerPos: -3<X<2, -1.64<Y<1.44, -1<Z<1 (cm); • Mass: 0.8<ppiMM <1.17, 1.66<LVTarM<2.1 (GeV/c2); • LVTarMom: 119.6<Px<80.4, -103.7<Py<96.3, -50<Px<50 (MeV/c);

  10. Appendix-2 Fig. Effect of Energy Deposit

  11. Appendix-3 Simulation Set GENETYPE: 3BPS ppp - /4BPS ppp -p 0 Gamma E:0.8~1.1 GeV (uniform); Beam Size: YZ-Plane Gaussian distribution w/ σ=0.5 cm; Target: LD2 w/ -3.61<X<0.39 cm Event #:1e6; SDCRES: 150μm ; CDCRES: 200μm ; HDTRES: 0.2 cm; OHZRES: 2.0 cm; DCEFF: 99%; DCEFFREG: 1.2;

  12. Appendix-4 TABLE I. Materials of NKS2 on the Particles’ Trajectory (inside CDC)

  13. That’s All.

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