sPHENIX discussion of physics

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

 

Introduction

 

D0-jet reco. production has inputs of kinematic selection from the D0-jet team. Pending update from Zhaozhong on EvtGen to support forced decay (D0->PiK)

Production planning: will proceed with producing c-cbar general sample (pending an update on TPOT today) and will request a D0-jet sample once EvtGen is ready

Truth reco association: a new chain is implemented by David Stewart. Request validation help from Joe on Truth-Reco DST object and Cameron on usage in KFParticle acceptance efficiency analysis. 

Plots for HP23: Dennis previewed the discussion for the general meeting for the last set of simulation production for HP23, and future conference plots will move toward real data. A new public plot requires analysis notes and Cameron's AuAu KFParticle notes are in circulation which could lead to new plots. Other plots suggestion are welcomed, which could be made public with short analysis notes. 

General presentation clarity: Please discuss the definition and cut used in plots for future presentations. 

 

 

Particle Flow QA - Antonio

Summary: a detailed look at current PF reco in pp collisions. Will update the first check for Au+Au soon

 

Jin: Low pT PID decomposition

 

Tony: choice of tracks? 

Antonio: started from reco track

Joe: Tracking quality cuts would be useful. 

Joe: And useful to have a truth particle flow object, which does not exist yet

 

Slide 6: 

Delta-phi: is produced comparing no-track match calo cluster with at-vertex truth phi, which can differ a lot due to magnetic bending of low pT particles. As there is no tracking to help correct the charge-sign-based bending, we probably have to accept this significant phi uncertainty for low-energy clusters as part of the phi inputs to PFJets. 

Antonio: there is a 500-MeV selection cut on minimal track pT. 

Joe: the tracking cut selection is historic and needs a wider optimization

 

Slide 10:

Dennis: good to look at visually the 4-cluster matched PF object

 

Slide 12:

Dennis: low pT calo response can be very wide

Jin: it would be very useful to look at 2D E_rec : E_truth which could h

 

 

Calo calib. plan - Justin

Summary: Emcal calibration is expected to be ready in time for the purpose of electron DST filtering 

 

Slide 23 gives the expected precision with respect to the sPHENIX run plan. 

Jin: will the position-dependent energy scale calibration be applied during this time line? 

Justin: expect to start with the simulated corrected. On-going development on pi0 method to provide sub-tower pi0 calibration

 

 

 

 

 

 

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: sPHENIX-HF-jets-l <sphenix-hf-jets-l-bounces AT lists.bnl.gov> On Behalf Of Huang, Jin via sPHENIX-HF-jets-l
Sent: Tuesday, February 14, 2023 11:43 AM
To: sphenix-hf-Jets-l AT lists.bnl.gov; Sphenix-upsilons-l AT lists.bnl.gov
Cc: sphenix-physics-l AT lists.bnl.gov; sphenix-maps-l AT lists.bnl.gov
Subject: [Sphenix-hf-jets-l] [reminder] weekly joint HF Upsilon TG meeting, at Thu Feb 16 2023, 11:30 EST

 

Hi Everyone

 

This is a reminder to the weekly joint HF Upsilon TG meeting, at Thu Feb 16 2023, 11:30 EST.

 

Currently on agenda, https://indico.bnl.gov/event/18338/ :

 

• Antonio Carlos Oliveira da Silva: Particle Flow QA
• Justin Frantz: quick update on Calorimeter calibration plan for Run23

 

Looking forward to talking to you at https://bnl.zoomgov.com/j/1613938007?pwd=QjYzUnpYQ2xNZWZLSy9qd3Z4dFpzZz09

 

Cheers

 

Jin

 

 

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________