Pile-up protection for min-bias trigger in Run 16

- slide 4,5 - at high ZDC rate -> efficiency loss seen
- slide 6: eff.  loss seems to be faster for data w/o pileup protection
- slide 7: double ratio ~ 1 -> no visible effect on HFT/TPC ratio, some effect for larger ZDC
- slide 10/11 - no significant effect on DCA
- the main effect is on the TPC tracking, 5-6% for single track, ~12% for D, may be important for Lambda_c (15-18% eff. lost)
- pileup-protection is on both past and future, so if we run only the future protection, then we could have only half of the effect.
- a possible solution -> loosen the protection conditions

- can we reach both HFT and MTD goals w/o pileup protection? (maybe, but this is difficult)

Zhenyu sent summary slides with updated HFT and MTD projections. We are collecting input till Friday evening PST.

protection tuning - the most efficient way is to wait for collisions and then adjust the parameters.

Zach's presentation on B->e/NPE ratio
- I lost my audio and could not follow the discussion.