Some Issues on Reconstruction of Jupiter Data with MarlinReco

1
Some Issues on Reconstruction of Jupiter Data
with MarlinReco

• S. Uozumi
• Jan-30 ACFA-sim-J meeting

2
Steps
?
?
LDC Full Tracking, PandoraPFA, LCFIVertex

• Confirm PandoraPFA performance using Z-pole data
  generated by Mokka (LDC00Sc).
• Convert Jupiter data using J42LCIO and try to
  reconstruct events with Marlin framework.
• Use single muon and Z-pole events for test.
• Reconstruct track with MarlinReco (TPCSilicon
  tracking)
• Perform jet energy measurement with PandoraPFA
• b, c-tagging using LCFIVertex
• Actual analysis of ZH -gt jets data.

3
PandoraPFA v2 performancewith Mokka z-pole data

• Still much worse than Marks result
• (he has shown 25 at Zeuchen).
• I have no idea for the reason.
• Will ask him about right settings.

4
Measured PT distributions

• Single muon data (cosq0, f02p, z0 1 cm)
  generated by Jupiter
• and converted to lcio.

pT(true) 1 GeV/c
2 GeV/c
5 GeV/c
10 GeV/c
20 GeV/c
100 GeV/c
PT (GeV)
500 GeV/c
200 GeV/c
5
Measured pT are shifted from true values ?

• 0.1 GeV shift is observed.
• Gear parameters setting may not be perfectly
  correct yet?

6
Momentum resolution
GLD DOD

• pT resolution looks consistent with DOD plot
• (except pT500 GeV).

7
Ongoing jobs / Plans

• Pandora performance ask Mark !
• Summarize input parameters (GEAR etc)
• to discuss about right values.
• Effort to establish the analysis path with
  PandoraPFA JetFinder LCFIVertex is ongoing.
• Does anybody know an easy way to generate
• single b/c jet events?
• (hopefully in stdhep format !)