 Low momentum tracks in TPC [message #12269] |
Thu, 14 July 2011 17:56 |
StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino
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first-grade participant |
From: *to.infn.it
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Hi,
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:
cbmsim.Draw("TrackPreFit.getMom().Mag()>>pre(100,0,2)");
cbmsim.Draw("TrackPostFit.getMom().Mag()>>post(100,0,2)");
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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Attachment: test2.gif
(Size: 6.07KB, Downloaded 630 times)
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