sPHENIX discussion of physics

["Huang, Jin" <jhuang AT bnl.gov>]

Minutes available on agenda page: https://indico.bnl.gov/conferenceDisplay.py?confId=3138

 

 

Announcement:

·       Jun 12: Encourage participation of working day @ tracking pre-collaboration meeting (BNL, room 3-192), to use the new tracking software for HF performance simulation.

 

 

News and Introduction - Xin and Jin

 

Key dates and events:

}  Soon-ish (in a week): sPHENIX nominal run plan and update all statistical projections. Expect 200B MB Au+Au in 5-year run plan

}  End-May: new tracking software (see Haiwang’s talk)

}  June: submission of analysis notes (next slides)

}  Jun 12: pre-collaboration meeting @ BNL  ← please attend

◦      Encourage HF TG participation in the work-day @ BNL

◦      Focusing on using the new tracking software for HF simulations

}  Jun 13-14: sPHENIX collaboration meeting @ BNL

}  Jun 15-16: RHIC PAC meeting

}  Jun 19: sPHENIX-charged MVTX Director’s review dry-run (see Ming/Xuan’s talk)

}  Jul 10-11: sPHENIX MVTX Director’s review (see Ming/Xuan’s talk)

◦      Major review on both science case and detector cost/schedule

}  Later summer: MVTX proposal submission to DOE

}  Expect DOE review later in 2017 or early 2018

 

Xin: What was the assumed DAQ rate?

Dave: Au+Au collision recording at a saturated the sPHENIX DAQ rate in the beginning of the fill.  

 

June 11 -12: pre-collaboration meeting tracking workfest.

Tony: Christof and Haiwang plan to start from June 11 on tracking software development. It would work well to have users of tracking software to participate on June 12.

 

Xin: what is the status of fast sim

Jin: We had home grown fast sim module. Formal implementation of a comprehensive fast sim such as using DELPHI is expect after June-July reviews and in collaboration with JS TG.

 

 

MVTX project news - Xuan

 

Slide 2:

Xin: When will be time line to update physics plot, cost/schedule in the pre-proposal and for the director’s review?

Conclusion: Ask Ming offline since he cannot attend meeting today.  

 

 

Thoughts from INT Workshop - Xuan

 

Slide 2: charm chemistry:

Tony: does the alteration of feed-down in HI complicate the CC_bar cross section measurement in HI?

Xin: Yes. May require survey measurements of all major charm states to get precise cross section measurements.

 

Jin: does Duke group has similar \Delta \phi estimation for B-jet correlations?

Action Item [Jin & Xin]: contact Shanshan Cao for input.

 

Jin: Does gluon splitting of charm production could complicate this?

Xin: Theory model used the Pythia CC_bar production estimation of gluon splitting

Jin: p+p may be used to ping it down

Xin: need higher statistics.

Jin: we may require developing p+p triggering in order to get the required statistics for D+D angular correlation measurement.

 

 

Tracking update - Haiwang

 

Haiwang: previous efficiency definition could be biased towards higher efficiency due to the definition.

Tony: should follow up offline.

 

Haiwang: wider DCA is observed with track with a fake silicon association.

Xin: checking pT dependence will be important.

 

Dave: what is truth pattern recognition.

Haiwang/Tong: best possibly do connecting clusters that belong to the same Geant4 truth track.

 

Jin: DCA width is about x2 larger below 10 GeV/c?

Tony: still double checking the source, task of this week.

Haiwang: suggesting large effect from charge sharing on MAPS.

 

 

Non-prompt D simulation update - Xiaolong, Xin

 

Plan:

·       Expand to the exclusive channel. Help on the tracking software.

·       Update estimation on non-prompt with new tracking.

 

 

B-jet theory comparison - Cesar

 

Summary: Ivan provided eight sets of curves on different hypnosis. Over R_AA from 0.8 @ 10 GeV/c to ~0.5 @ 20 GeV/c. Plan to make the plot and circular to the list.

 

Xin: Does he have light and charmed jets?

Cesar: Good suggestion on charmed jets

Jin: how about light jet?

Cesar: will ask.

Cesar: inputted 90% b-jets from b-quark jet, 10% from gluon splitting.

 

 

Discussion and planning:

 

Task list see first slides.

 

Data production - strategy for HF topical group.

·       Will share heavy burden calorimetry simulation in heavy ion collisions. with the sPHENIX common production

·       For tracking-only simulation, we can run our own production and take advantage of the improving tracking software and our connection to tracking software team.

 

Tony: what will be required from tracking group?

Jin: in priority and also in readiness:

1)      DCA VS pT that represent the best understanding of the silicon tracker, e.g. ladder geometry and charge sharing, etc.

2)      update performance plot in central Au+Au simulation with new patter recognition software

 

 

 

 

______________________________

 

Jin HUANG

 

Associate Physicist

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: sPHENIX-physics-l [mailto:sphenix-physics-l-bounces AT lists.bnl.gov] On Behalf Of Huang, Jin
Sent: Sunday, May 14, 2017 3:00 PM
To: Xin Dong <xdong AT lbl.gov>; sphenix-hf-jets-l AT lists.bnl.gov; sphenix-maps <sphenix-maps-l AT lists.bnl.gov>
Cc: sphenix-physics-l AT lists.bnl.gov
Subject: [Sphenix-physics-l] [reminder] HF Topical Group Meeting (May 2017) on 5/15 12pm EST @ 2-219

 

Hello everyone,

 

This is a reminder for the next monthly HF Topical Group Meeting (May 2017) on tomorrow (May 15) 12pm (BNL Time), covering a wide range of topics including project status, new thoughts and study updates.

·       The agenda: https://indico.bnl.gov/conferenceDisplay.py?confId=3138

·       Phone bridge is https://bluejeans.com/797965616

·       For residents at BNL, let’s meet at the 2-219 conference room.  

Looking forward to talking to you tomorrow.

 

Cheers,

 

Jin

 

 

______________________________

 

Jin HUANG

 

Associate Physicist

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: sPHENIX-MAPS-l [mailto:sphenix-maps-l-bounces AT lists.bnl.gov] On Behalf Of Xin Dong
Sent: Tuesday, May 9, 2017 3:01 PM
To: sphenix-hf-jets-l AT lists.bnl.gov; sphenix-maps <sphenix-maps-l AT lists.bnl.gov>
Subject: [Sphenix-maps-l] HF Topical Group Meeting (May 2017) on 5/15 12pm (BNL Time)

 

Dear All,

 

Thank you all for filling out the doodle poll. Based on the results, fortunately, we can have our May TG meeting on May 15 (Monday) 12pm (BNL time). Sorry that it was listed only as a one-hour meeting. I think the meeting will run for probably 1.5-2 hours.

 

Please find the proposed meeting agenda and the BlueJeans connection information from the following link:

 

https://indico.bnl.gov/conferenceDisplay.py?confId=3138

 

Looking forward to a productive discussion on Monday with you. Thanks and Best Regards

 

Jin and Xin

 

--

===========================
Xin Dong
Nuclear Science Division
Lawrence Berkeley National Lab
MS70R0319, One Cyclotron Road
Berkeley, CA 94720, USA
Tel: +1-510-486-4121
Email: XDong AT lbl.gov
===========================