sPHENIX tracking discussion

[Anthony Frawley <afrawley AT fsu.edu>]

Good. I also noticed that the seed matching windows are unchanged:

  // these get us to about 83% INTT > 1

  silicon_Seeding->setinttRPhiSearchWindow(0.4);

  silicon_Seeding->setinttZSearchWindow(2.0);

would best be:

silicon_Seeding->setinttRPhiSearchWindow(0.2);

silicon_Seeding->setinttZSearchWindow(1.0);

Tony

---

From: Osborn, Joseph <josborn1 AT bnl.gov>
Sent: Thursday, March 6, 2025 4:00 PM
To: Anthony Frawley <afrawley AT fsu.edu>; Anthony Frawley via sPHENIX-tracking-l <sphenix-tracking-l AT lists.bnl.gov>
Subject: Re: Updated Macro

 

Hi Tony,

I agree, I noticed when running some tests this afternoon that the number of reconstructed vertices goes down pretty significantly with this high of a cut. We should explore the cut space and try to determine what the best options are, in the meantime I can reduce this to 0.1 for now.

Joe

___________________________

Joe Osborn, Ph.D

Physics Department

Brookhaven National Laboratory

josborn1 AT bnl.gov

---

From: Anthony Frawley <afrawley AT fsu.edu>
Sent: Thursday, March 6, 2025 3:52 PM
To: Anthony Frawley via sPHENIX-tracking-l <sphenix-tracking-l AT lists.bnl.gov>; Osborn, Joseph <josborn1 AT bnl.gov>
Subject: Re: Updated Macro

 

Hi Joe and All,

I think that a pT cut of 0.5 GeV/c is too high for primary vertexing in pp collisions.  It will dramatically reduce the vertex finding efficiency for minbias events. I think we should use a cut that is no higher than 0.2, and really 0.1 is probably better. 

The other cuts are probably fine for now.

Cheers

Tony

---

From: sphenix-tracking-l-request AT lists.bnl.gov <sphenix-tracking-l-request AT lists.bnl.gov> on behalf of Osborn, Joseph <josborn1 AT bnl.gov>
Sent: Thursday, March 6, 2025 12:18 PM
To: Anthony Frawley via sPHENIX-tracking-l <sphenix-tracking-l AT lists.bnl.gov>
Subject: [[Sphenix-tracking-l] ] Updated Macro

 

Hi all,

I updated the macro to make the changes discussed today. See the PR here to see how you can update your macro similarly, or do a git pull.

https://github.com/sPHENIX-Collaboration/macros/pull/1078

Joe

___________________________

Joe Osborn, Ph.D

Physics Department

Brookhaven National Laboratory

josborn1 AT bnl.gov