Add tracks filtering on dedx to TPC tracking output

[shahor02]

@wiechula @miranov25

Effect of default cut settings on 38kHz LHC23zzh_544116

[miranov25]

Reference presentation slide:

[miranov25]

Hello @shahor02

Thank you for submitting the pull request.
I have looked at your implementation, and it matches what I described in my slides. From that perspective, I agree with you. However, I foresee a possible "side effect" in the future if the change remains unchanged. We would have to make sure that TPC dEdx is always set (dEdx!=0). Currently, we rarely encounter tracks with dEdx=0, but to be on the safe side, I suggest a slight code adjustment for additional protection:

• If dEdx==0 and |eta| > is 0.03, we should not apply cuts (tiny part)

With this change, tracks with unsigned - dEdx=0 will also be considered.
Although this is currently not a problem, we have observed tracks with dEdx=0 in Run1 and Run2, especially near the sector edges where the last pad was not used for the dEdx calculation.

I am not sure what @wiechula is planning in this area, but I believe that the change I suggested would be an appropriate safety measure.

Marian

[miranov25]

If the suggestion mentioned above is implemented, or if Jens confirms that tracks at the edges with undefined dEdx should not occur, I believe we are ready to proceed with the merge.

[miranov25]

After thoroughly reviewing the code modification, I believe the implemented protection aligns with our agreement. Given this, I propose proceeding with the merge.