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icon5.gif  Low momentum tracks in TPC [message #12269] Thu, 14 July 2011 17:56
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
first-grade participant

From: *
trying to explore the problems in tpc reconstruction, I have explored the results from the tpc riemann before and after the kalman fit. In particular I have plotted, for eta_c events:


The following is the result:


It is not clear to me why so many tracks are shifted below 0.1 GeV, and they are cut away from the PidCorrelator (which has a cut 0.1 < p < 10 GeV/c). This could cause the problems with low efficiency.
Could you please investigate about? They are for sure screwed. The final distribution with TrackPostFitComplete is quite strange, at the end.

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