HF minutes 2020/04/30

1) Trigger bias factor for J/psi R_pAu with MTD 2015 - Rongrong Ma

  • slide 6, a bug was found in Takahito's code. Takahito commented that he shared his code with someone else, such as David for his D in pp500 GeV check, Pavol confirmed that they are using Takahito's code and will look into it and fix it.

2) Update on D+/- in Run16 Au+Au - Jan Vanek

  • Currently the Dca distribution is from some period, not the whole run. 
  • Slide 7, need more statistics

3) Update on J/psi in a jet - Qian Yang

  • slide 8, right plot, will check why PYTHIA is below the data in all the bins.
  • slide 10, there was a question about why the statistical uncertainty is comparable for R=0.2 and R=0.4. The conclusion is due to larger \eta acceptance with smaller R cut.

4) Update on multiplicity distribution in pp for Upsilon analysis - Leszek Kosarzewski

  • The TOF matching ratio is found to be too small, PAs will contact Frank and Zaochen.

5) QA of J/psi in run15 pp HT1 and HT2 - Ziyue Zhang

  • slide 10, check the shift log to see what was the problem with the bad runs with run index around 560
  • there was discussion on the plan for Hard Probes 2020. Zhenyu commented they plan to calculation RpAu using raw counts from pp and pAu, Assuming the efficiency is the same in pp and pAu.