sPHENIX MAPS tracker discussion

[Hideki Okawa <Hideki.Okawa AT cern.ch>]

Heavy Flavor Topical Group Meeting (2021/5/3)

https://indico.bnl.gov/event/11406/

Introduction - Jin

BUP2021 is under preparation (deadline May 30). We will

argue for 28 cryo-weeks, since 20-week runs will not be

cost-effective: we will lose pA runs completely and the

impact of B->D v2 will be reduced, for example. Please

send us plots if you have any.

Ming: MVTX meeting is moved to Monday due to the

future organization discussions on Friday.

Ming has presented his preliminary ideas for the future

sPHENIX organization.

Yasser: There was a gap between hardware and analysis

  groups in ALICE.

Jin: Communication between the two groups is important.

  How can we encourage that? Any ideas?

Ming: Regular joint meetings, for example.

Yasser: In ALICE, there are 3-6 months of service tasks for

   students and postdocs for detector-related areas.

Hideki: In CMS, 6 months of service tasks for the authorship,

   and ~4 months annually after obtaining the authorship.

Hideki: How are the conference speakers chosen in PHENIX?

Jin: Speakers for high profile conferences are chosen for

   those with significant contributions. Other talks are less

   formally chosen.

Hideki: ATLAS maybe has the most automated speaker

   nomination system among the LHC experiments with the

   ranking in the database.

Cameron: The current sPHENIX style is similar to LHCb.

HF Tools - Cameron Dean

p.2:

Cameron: The new macro now works with vectors. Please

   note that the older versions with arrays will no longer run.

Cameron: How many events do we want for MB? 10M?

Jin: MB should run faster than ccbar, right?

Cameron: Actually, the reconstruction takes more time than

   the simulation: 70~90 sec/event. 

Jin: Interesting. We need lots of MB events, so let's produce

   50M. We may also consider high qhat samples afterwards.

   Also, we will need fastsim.

Yasser: The pthard samples are also considered in ALICE.

Hideki: Can the fastsim-smeared tracks be propagated to

   jet finding?

Cameron: They can be propagated.

Jin: However, for jet studies, the upcoming full simulation

   samples should be sufficient.

Zhaozhong: I did not manage to run with ana.241 previously,

   but will try again. Something crashed with the forward ECAL.

Jin: The forward ECAL part was moved to ECCE. In any case,

  you should not have a line for the forward ECAL in your macro.

Zhaozhong: I will check.

D_s & D^+ - Zhaozhong Shi

p.2:

Cameron: Are the numbers really events or actually entries?

Zhaozhong: They are entries.

Cameron: OK. The entries correspond to the number of

   candidates. The bbbar samples have more candidates due to

   more tracks.

p.3:

Jin,Yasser: How did you get the prompt/non-prompt ratio?

Zhaozhong: The raw numbers are considered.

Jin: You need to scale the numbers by the cross section. They

   are saved in the DST files.

Yasser: Do we have the information of the pythia header file?

Jin: In DST, yes.

Cameron: KFParticle has information from the HepMC files.

p.4:

Jin: I want to see the acceptance efficiency. It should be different

   with and without phi.

Ming: Are these ccbar or bbbar only? No QCD background?

Jin: ccbar or bbbar only. QCD background is yet to be produced.

Yasser: Which plots can I show in my upcoming talk?

Jin: All the plots in sPH-HF-2021-001. The bottom plots are not

   public.

Hideki, Ming: Please clarify in the plots whether they are from

   the ccbar or bbbar.

Sebastian: There is a systematic shift in the mass from the PDG

   value.

Zhaozhong: Yes, around +5 MeV in D^+.

Cameron: I did not see such a shift in local-filtered samples.

Jin: It is worth checking whether the shift stays after the truth

   tagging. Generating private samples with D^+ particle gun is

   another approach to check.

Hideki: We should prepare an overleaf so that Zhaozhong can

   put his plots.

Jin: Yes. Just to confirm, the next note will be with complete

   MDC1 studies. We don't plan to submit many small notes

  with work-in-progress figures.