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  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

7. Event Select

11. 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/c 2 ); LVTarMom: 119.6<Px<80.4, -103.7<Py<96.3, -50<Px<50 (MeV/c);

12. Appendix-2 Fig. Effect of Energy Deposit

13. Appendix-3 Simulation Set GENETYPE: 3BPS pp  - /4BPS pp  -  0 Gamma E:0.8~1.1 GeV (uniform); Beam Size: YZ-Plane Gaussian distribution w/ σ=0.5 cm; Target: LD 2 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;

14. Appendix-4 MaterialDepth (cm) Density （ g/cm 3 ） TargetLiquid D 2 Φ4.8×3.30.17 Target Cell FilmUpilex-S75×2e-41.47 Super-Insulator Aluminized Mylar50e-4×21.39 Mylar6e-4×15(?)1.39 Target Out Cell WallCFRP0.151.55 IHPolyvinyltolunene0.51.03 SDC WindowMylar200×2e-41.39 Straw CellAluminized Mylar30×6e-41.39 SDC GasAr+Ethane(50:50)4.51.57e-3 CDC inner WindowCFRP500e-41.55 TotalNormal to IH material 1.171.03 TABLE I. Materials of NKS2 on the Particles’ Trajectory (inside CDC)

15. That’s All.