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					Track reconstruction

Jon Coleman for the tracking group
The Tracking Efficiency
Task force

   nothing which is obvious enough to be
    related to or caused by the simulation.
       Hence no wild guesses
 This is the General Conclusion
 However………
This is a Brainstorming
workshop

 There are differences in Data and MC
 BaBar has a huge amount data

 Systematic behavior is apparent

 e.g. Detector model used in
  reconstruction is different than in IR2
 How to address this?
          0                         MC
         KS        M ass
       (Mass – PDG) vs. Rvtx
•MC is self consistent
•Data Implies Material is Missing
•Candidates:
   •DCH Paint on Inner Wall         Data

   •Support Tube
   •SVT Material
   •Magnetization of B1/Q1
     Improving mass behavior

Present Detector Model   Best Guess model
     Cross Check with L0->pp




 Overcorrection from Model Estimate
 Needs more studies
Summary
 Mass shifts are apparent in the
  reconstructed particle spectrum
 The mini makes these questions
  much simpler to address

Advert
   Tracking group needs fresh minds for
       calibrations
       Data-MC comparisons
       Etc, etc………
   Open to suggestions

				
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posted:8/27/2012
language:English
pages:7