HF PWG Meeting Minutes - 2015/06/18

J/psi in BES paper status - Wangmei
This report on paper status is unfortunately missed due to up limit of attendance of the BlueJeans meetings (25). The BlueJeans account issue will be fixed and the up limit will be enough (100). We should proceed with the paper draft and analysis note. 

NPE in Run10 Au+Au 62.4 GeV paper status - Mustafa
There are discussion that the systematics for RAA comparing with statistic error looks small. This need to be checked.
Convenors need to finish with comments with this paper proposal in ~1 week.

Event Plane Calibration status for Run14 MTD J/psi v2 - Takahito

D0 NMFs from Run14 - Mustafa
The Run 14 RCP show larger error bar than Run 10 for the lowest pT bins. We need to consider TPC alone for this pT range. We can also consider combining Run 14 and Run 10 if it's worthy. And we need to prepare a good answer for this if a speaker is asked on this in a conference. For the v2 interested "low pT", the HFT result is still better. 
It is suggested not promising looking at the "bump" in run 14 data in QM abstract.
Simulation need to be done as a check of the efficiency correction using real data method.

Mixed Event package for the RNC-HF analysis library as well as a quick case study using Mixed Event with D0 - Michael
The event is scaled 10 times, while the D0 background is scaled by about 7. This need to be understood. Then the method to scale (how to get the 7) need to be reconsidered.

KFVertex resolution and D0 correlation v2 - Liang
Further confirmed that KF is better than Minuit. Need to check number of tracks rejected / remain when rejecting D0 candidate daughters. The D0 tree production can wait for answer on this later.
There seems to be something wrong for D0 v2 error (the collaboration meeting results seem right). Need to check.
Side band v2 vs m does show some trend. Need to come with a right way to subtract background v2 (maybe two side bands with equal yield, equal distance from the D0 peak?). 

tracking/matching efficiency study in D triggered correlation in p+p collisions at 500GeV - Long Ma
The 3rd equation in Page 6 assumes independence between tof and bemc match efficiency. A better way is to calculate (Tof or Bemc) efficiency directly using the method in Page 5.

D0 reconstruction with KFParticle - Amilkar
There is a suggestion to check KFParticle and TMVA selection tuning one by one, using KFParticle but the same cuts used others. 
The "trk1vtx" cuts seems to have the opposite direction than expected. Need to check whether the signal and background sample go through the same cuts and so on.
There is a suggestion to show more details how the used viables are chosen, and how the used TMVA method is chosen.