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HF PWG Meeting Minutes by Zhenyu - 2017/7/6

Updated on Fri, 2017-07-07 04:28. Originally created by yezhenyu on 2017-07-07 00:02.

Xiaolong agreed to study the test production Sti/StiCA/StiHR 

1) Trigger bias study for Run15 pp200 - Takahito Todoroki

slide 3 compare the fraction of VPD triggered events in BBC-triggered MB data between data and simulation 
slide 4-5 will try Pythia6 tune Perugia2012 and Pythia8 default
slide 8-9 use DbV20160418 for pp, DbV20160710 for pAu
slide 10 Vtx requires |MC-Rc Vz|<1.5 cm
slide 13: will reweight simulation to match lumi profile with data. Data require |VPD-TPC Vz|<3 cm while simulation requires |MC-Rc Vz|<1.5 cm. This could introduce a mismatch between data and simulation when counting the equivalent number of MB events
slide 18 Pythia8 includes Jpsi production in all orders of Multiple-Parton Interactions, while Pythia6 only the leading MPI. It is better to use Pythia8 than Pythia6 for event activity studies.


2) Ds v2 from Run14 AuAu200 - Md. Nasim 

slide 4: need to apply Ds efficiency correction for pT and v2 (yield) extraction
slide 5: use the corresponding efficiency correction after changing the topological cuts 
slide 7: report eta-sub result only
3) D0 v1 from Run14+16 AuAu200 - Sooraj Radhakrishnan

analyzed Run16 data may have ~100M events missing due to not all data files available 
quote the results with the efficiency correction
symmetrize the uncertainty or take the mean value of two variations 
 

4) D0 v1 from Run16 AuAu200 - Subash Singha
pick up a few events and compare the relevant outputs between the two analyzers
compare the final v1 vs y, and the fitted slope parameters for Run14 and Run16 separately between the two analyzers

 
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