Current status of K* Analysis - PowerPoint PPT Presentation

current status of k analysis n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Current status of K* Analysis PowerPoint Presentation
Download Presentation
Current status of K* Analysis

play fullscreen
1 / 57
Current status of K* Analysis
175 Views
Download Presentation
nitesh
Download Presentation

Current status of K* Analysis

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. LEPS group meeting Current status of K* Analysis Pusan National University Sanghoon Hwang May 1, 2008, SINICA

  2. Outline Data status Calibration Quick Analysis Outlook • Status of Data • Current status of calibration • Quick analysis • Summary & Outlook by S. H. Hwang

  3. Data status Calibration Quick Analysis Outlook Current status of data Period of experiment 2007. 10/6 ~ 10/18. 2007. 11/8. ~ 12. 17. Online Trigger Total : 485 M Horizontal : 244.7M Vertical : 240.9M Filling pattern r37768 ~ r37808  2/29-filling + 26 bunches r37809 ~ r37912  160bunch-train x 12 r37922 ~ r38022  1/14-filling + 12 bunches r38023 ~ r38068  160bunch-train x 12 r38069 ~ r38314  203 bunches by S. H. Hwang

  4. Data status Calibration Quick Analysis Outlook Current status of Calibration LEPS ana • LEPSana & LEPSres(for DCs calibration) are working well on the hepfarm2 • Perl shell to submit Condor system was done. Ntuple • We produced 1st ntuples to check run-dependency and calibrate ToF & DCs parameters on the Miho & Condor system. (@miho /home/shhwang/kstar_nt)  Input preliminary parameter of DCs & ToF. • We produced 2nd ntuples on the Condor system at April 23. (@miho /home/shhwang/nt_v2.0) • Input new parameter of DCs(dc_wt0, dc_drf, dc_res, dc_drfagl) • Input T0, Sol parameters for ToF (Parameters file : @miho /home/shhwang/parameters_v2.0) Tagger SSD alignment We are going to calibrate Attenuation of ToF by S. H. Hwang

  5. Data status Calibration Quick Analysis Outlook DC calibration Calibration Step 1. DC t0 calibration for each wire 2. DC xtangle calibration (dc_drf, dc_drfagl, dc_res) 3. Check X2 probability to compare with ntuple quality DC resolution parameter dist. ntrk=1, -1050<vtz<-860, qq=1, 0.8<pm<1.2, abs(ybar)>30 Mean of Prbchi2 c2 probability for 2nd produced Ntuple Runnumber by S. H. Hwang

  6. Data status Calibration Quick Analysis Outlook Tof Calibration Calibration Step 1. RF calibration a. RF slewing correction b. Each RF mean position fitting (2. Tof Slewing correction) M2 = P2(1/b2 – 1) = pp2[(c/sleng)2 (rawToF x0.025 + t0glb + T0)2-1] 3. T0 calibration T0 = sqrt{(pm2/pp2)+1} – (rawtof*0.025 + t0glb ) 4. Speed of light in the ToF. Selected particle distribution for T0 calibration (5. Attenuation Length) Ytrk = Sol * Tofdiff + Offset Distribution of Sol parameter by S. H. Hwang

  7. Data status Calibration Quick Analysis Outlook Mass2 Run Dependency 0.4<pp<0.9, 0.5<pm2<1.1 pp<1.5, abs(ybar).ge.60, qq=1 pp<1.5, 0.15<pm2<0.35 pp<1.5, abs(ybar).ge.60, qq=-1 by S. H. Hwang

  8. Data status Calibration Quick Analysis Outlook Tof resolution ToF resolution of each ToF bar 17.58 mm Ytrk-ytdc(mm) by S. H. Hwang

  9. Data status Calibration Quick Analysis Outlook Tof resolution (Run dependency of ToF bars resolution for 2nd Ntuples) Prbchi2>0.02, itof=tofid, ntoul<=6, abs(ytof-tofdiff)<=200 ytof-tofdiff ytof-tofdiff by S. H. Hwang

  10. Data status Calibration Quick Analysis Outlook Tof resolution Prbchi2>0.02, itof=tofid, ntoul<=6, abs(ytof-tofdiff)<=200 ytof-tofdiff ytof-tofdiff by S. H. Hwang

  11. Data status Calibration Quick Analysis Outlook Tof resolution Prbchi2>0.02, itof=tofid, ntoul<=6, abs(ytof-tofdiff)<=200 ytof-tofdiff ytof-tofdiff by S. H. Hwang

  12. Data status Calibration Quick Analysis Outlook Tof resolution Prbchi2>0.02, itof=tofid, ntoul<=6, abs(ytof-tofdiff)<=200 ytof-tofdiff ytof-tofdiff by S. H. Hwang

  13. Data status Calibration Quick Analysis Outlook Particle identification Counts Momentum (GeV/c) Mass/Charge (GeV/c2) Counts Mass/Charge (GeV/c2) Photon Energy (GeV) by S. H. Hwang

  14. Data status Calibration Quick Analysis Outlook EE veto bar virtual plane of EE veto bar virtual plane of eeBlocker Virtual plane of y-axis(mm) Virtual plane of y-axis(mm) Virtual plane of X-axis(mm) Virtual plane of X-axis(mm) by S. H. Hwang

  15. Data status Calibration Quick Analysis Outlook Particle selection Particle selection 4s Counts ntrk > 1 prbchi2 > 0.02 ithtofhit > 0 abs(ytof-tofdiff) < 90 abs(itof-tofid) < 2 fntag = 1 noutl < 6 abs(pm) > 0 tdcee(1) < 0 tdcee(2) < 0 Counts by S. H. Hwang

  16. Data status Calibration Quick Analysis Outlook Vertex cut Vty Start count Vertex Detector Vtx Vty -866<vtz<1070 -15<vtx<15 -15<vty<15 Vtx by S. H. Hwang

  17. Data status Calibration Quick Analysis Outlook Cut condition K mass  p mass gp  pp+p- by S. H. Hwang

  18. Data status Calibration Quick Analysis Outlook Cut condition Photon Energy Photon Energy Eg > 1.8 Eg > 1.8 IM(K+p-) MM(gK+p-) by S. H. Hwang

  19. Data status Calibration Quick Analysis Outlook 100 % gp  L(1405)K+  S+p-K+ L(1520)K+  S+p-K+ 42 % Cut condition Cut by S. H. Hwang

  20. Data status Calibration Quick Analysis Outlook Preliminary Results K0*(892) Mean = 0.8862 Sigma = 0.0255 S+(1189) Mean = 1.175 Sigma = 0.014 by S. H. Hwang

  21. Data status Calibration Quick Analysis Outlook Preliminary Results f k*0 w/o k with k qc.m. k*0 by S. H. Hwang

  22. Data status Calibration Quick Analysis Outlook Preliminary Results Horizontal Vertical # of event : 169 (0.8~1.0) # of event : 410 (0.8~1.0) by S. H. Hwang

  23. Data status Calibration Quick Analysis Outlook Preliminary Results Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  24. Data status Calibration Quick Analysis Outlook Summary & Outlook • We have collected approximately 500 events of K* photoproduction reaction with linearly polarized photons from 1.5 GeV to 3.0 GeV. • We are going to calibrate Tag and SSD alignment. • We are going to measure a beam asymmetry which gives a clue on t-channel exchange particles of K* photoproduction. by S. H. Hwang

  25. Thanks for LEPS collaborators by S. H. Hwang

  26. Calibration K* experiment Results Outlook T0 calibration methode M2 = P2(1/b2 – 1) = pp2[(c/sleng)2 (rawToF * 0.025 + t0glb + T0)2-1] T0 = sqrt{(Mass2/pp2)+1} – (rawtof*0.025 + t0glb ) PID by S. H. Hwang

  27. Outline K* Experiment Results Outlook Backup page PID 4s cut L, MM(gp+p-), 0.85<IM<1, 1.1<MM<1.25 Counts Counts cut L, MM(gp+p-) Counts Mass/charge (GeV/c2) Mass/charge (GeV/c2) by S. H. Hwang

  28. Outline K* Experiment Results Outlook Backup page cut L, MM(gp+p-), 0.8<IM<1, 1.1<MM<1.25 PID 4s Momentum (GeV/c) Momentum (GeV/c) Mass/charge (GeV/c2) cut L, MM(gp+p-) Momentum (GeV/c) Mass/charge (GeV/c2) Mass/charge (GeV/c2) by S. H. Hwang

  29. Outline K* Experiment Results Outlook Backup page MC Data by S. H. Hwang

  30. Outline K* Experiment Results Outlook Backup page K+ momentum distribution vs. cos(theta) Pi- momentum distribution vs. cos(theta) by S. H. Hwang

  31. Outline K* Experiment Results Outlook Backup page by S. H. Hwang

  32. Outline K* Experiment Results Outlook Backup page by S. H. Hwang

  33. Outline K* Experiment Results Outlook Backup page hori vert by S. H. Hwang

  34. Outline K* Experiment Results Outlook Backup page by S. H. Hwang

  35. Outline K* Experiment Results Outlook Backup page by S. H. Hwang

  36. Outline K* Experiment Results Outlook Backup page K* by S. H. Hwang

  37. Data status Calibration Quick Analysis Outlook Preliminary Results Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  38. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  39. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.133 by S. H. Hwang

  40. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.2 by S. H. Hwang

  41. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  42. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.133 by S. H. Hwang

  43. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.6 GeV cos(qC.M.) 1bin : 0.133 by S. H. Hwang

  44. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.3 by S. H. Hwang

  45. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.85 ~ 1.0 Photon Energy 1bin : 0.6 GeV cos(qC.M.) 1bin : 0.3 by S. H. Hwang

  46. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  47. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.133 by S. H. Hwang

  48. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.2 GeV cos(qC.M.) 1bin : 0.2 by S. H. Hwang

  49. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.1 by S. H. Hwang

  50. Outline K* Experiment Results Outlook Backup page Vertical Horizontal Mass : 0.8 ~ 1.0 Photon Energy 1bin : 0.4 GeV cos(qC.M.) 1bin : 0.133 by S. H. Hwang