High mass 'Twin peaks' in HYDJET+Z mixed sample

General considerations

Problem

• Illustration
• Data: cfg

Approach

• Idea
• Data sample production
• Sanity production

Results

Extra peak : M[40,80], pT_dimuon>12

• Mass contribution
• Detail investigation: id of the 'single' Id and its parent Id
  • muz0_muz0
  • muz0_muf
  • muz0_ff
  • muf_muf
  • muf_ff
  • ff_ff

Summary

• Tabels with different channels

Conclusions

• found the contributors, the question is why it appears in the production sample; channel,
• check:
  • other, hi-central produced minbias samples
  • look in hiSignal and generator separatelly (embedded signal and background only respectively)
  • 'ditrack' invariant mass
  • mismatch between si-track and sta-muon --- run separately sta and si-trk matching, and compare concomitently with the glb-matching

-- CameliaMironov - 15-Jul-2010