p=3-6_pt=0.0-0.2 ################ general ------- # points on the very bottom or top of the TPCs are still easily lost see examples # besides tracks whose particles decayed in flight or just cross the very corner of VT2 a/p is never below 70% # no wrongside tracks positives (99tracks) -------------------- track | observation ------+------------------------------------------------------------- 1 | still a few lost points in the middle of the MTPC track 11 | lost points on top of MTPC 32 | second part of split track? 40 | second part of kink? | -> would be removed by a/p cut because of missing VT1 points 55 | still a few lost points in the middle of the MTPC track 63 | not recoverd split track? or kink? (points in MTPC are a bit off) 66 | second part of decay? | -> would be removed by a/p cut because of missing VT1 points 71 | calculation gives 0 pot. points in MTPC but there are several | fitted to the track! 96 | second part of kink? -see short track piece in VT1 negatives (99 tracks) --------------------- track | observation ------+------------------------------------------------------------- 1 | few lost points at the bottom of MTPC 12 | lost points on top of MTPC -> split track? 26 | very often these tracks cross just the corner of VT2 | -> therefore here e.g. a/p(VT2) only 50 | => be careful with cuts! 44 | split track? - but green line that seems to fit both tracks | has bx of -5.99 50 | fit seems to be a bit off in the MTPC | -> recovered 'split track' that could be a kink in reality? 51 | kink? but seems to be treated correctly - that is not fitted | to theoriginally tack 67 | still lost points in mtpc