sPHENIX discussion of software

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

 

Announcement:

RCF Group registration is open: http://goo.gl/forms/5SzP94oiHfq1dB802

 

 

Repository update:

Action Item [Nils & Jin]: double check Pythia6 pull request

Action Item [Jin]: Rais a GitHub issue on the NAN vertex

 

 

Making TPC simulation working: Mike McCumber

 

Alan, Mike, Tony and Sourav worked on multiple fronts on the TPC software:

·       Memory use issue: Problem in clustering. Mike found a possible fix

·       HIJING reconstruction: able to reconstruct within a slice of pseudo-rapidity slice in expert mode. First test show encouraging results.

·       Momentum reconstruction issue: possible fix via fixing clustering

·       z digitization and clustering: Alan just proposed fix

 

Discussions:

Gunther: does HIJING simulation has all underlying hits in the eta slice?

Mike: Yes

Gunther: consider extract projection residual

Mike: need more days in order to get that.

 

Tom: model for distortion estimation in TPC is ready.

 

Next:

Action Items [Mike]: Fix single particle performance check: 

Action Items [Tom, Jin, Tony]: implement TPC distortion in production code

 

 

Jet structure Calorimeter simulation – Rosi Reed

 

Page 10: How to quantify tails?

Jamie: high-Z punch through could be rejected via z>1 cut

Jamie: how to quantify effect of tails?

Gunther: would require full jet analysis.

Rosi: JS TG plan to study after ALD charge

 

Page 11:

Need fit on the points to quantify deviation from Gauss

 

Page 12:

Gunther: Does reduced EMCal + thin HCal response lead to large difference?

Rosi: will follow up

 

Page 13:

Sarah: extreme thin case needed?

Gunther: not required

Dave: is track momentum using truth momentum?

Rosi: Yes. Full tracking simulation has to be deferred to after charge

 

Page 18:

Jamie: jet leakage is related to E, not ET.

Rosi: good point.

Is flat plates used in Hcal and does HCal radiation length gets larger in simulation?

Jin/John: Yes. In both simulation and mechanical design

 

Page 19: post ALD charge, plan to include tracking in jet structure studies

 

General comment:

Sarah, Rosi: 1-D SPACAL was selected for fast computing in ALD charge. No preference from jet group yet

 

Page 21:

Task list that need volunteer!

 

 

Kalman filter tests – Haiwang Yu

 

Page 3:

Mike: be cautious caveats in vertex use in single track study.

Haiwang, Jin: this definition of DCA_2D is specifically designed for fitter cross check,

 

Page 4: GenFit DCA resolution seems worse in low momentum tracks

Mike: Check efficiency too, in case GenFit included more tracks with bad fits

Jin: Suggest only compare track that passed both fitter

 

Plan:

·       Check efficiency in DCA comparison

·       Implement primary track fits

 

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

 

> -----Original Message-----

> From: Huang, Jin

> Sent: Monday, May 23, 2016 5:08 PM

> To: 'sphenix-l AT lists.bnl.gov' <sphenix-l AT lists.bnl.gov>; 'sphenix-software-

> l AT lists.bnl.gov' <sphenix-software-l AT lists.bnl.gov>

> Subject: [reminder] sPHENIX simulation and software meeting, Tue May 24,

> 1PM EST @ 2-219.

>

> Hello everyone,

>

> This is a reminder that we will have a quick sPHENIX simulation and software

> meeting, Tue May 24, 1PM EST @ 2-219.

>

> Currently on agenda:

> •         Tracking software updates

> •         Kalman filter with primary vertex refit and DCA checks

> •         (tentative) calorimeter simulations in jet structure group

> More contributions are welcomed too.

>

> The agenda page is at

> https://indico.bnl.gov/conferenceDisplay.py?confId=1911   , for which the

> common modification password is "1008"

> •            For residents at BNL, we will meet at the 2-219 conference room this

> time

> •            To join the Meeting via phone bridge:

> https://bluejeans.com/619960505

> •            To join via Phone:

> 1) Dial:

>         +1.408.740.7256

>         +1.888.240.2560(US Toll Free)

>         +1.408.317.9253(Alternate number)

>         (see all numbers - http://bluejeans.com/numbers)

> 2) Enter Conference ID: 619960505

>

> Cheers,

>

> Jin

>

>

> ______________________________

>

> Jin HUANG

>

> Brookhaven National Laboratory

> Physics Department, Bldg 510 C

> Upton, NY 11973-5000

>

> Office: 631-344-5898

> Cell:   757-604-9946

> ______________________________

>