sPHENIX cold QCD topical group

["Osborn, Joe" <osbornjd AT ornl.gov>]

Hi Desmond,

 

Thanks for the nice set of slides – I have a few minor comments below. Good luck with your talk tomorrow!

 

Joe Osborn

 

Pg 4 – For hadronization, you could consider putting “jet substructure” instead, or adding jet substructure as another bullet.  sPHENIX also was designed as a jet substructure detector, and we should also be able to learn about (perturbative) fragmentation patterns in addition to (nonperturbative) hadronization physics.

 

Pg 19 – I’m not sure if you plan to say this verbally, but it should probably also be mentioned that sPHENIX has a dedicated B meson and B jet program. You may also get asked why this plot has ~200 pb luminosity (it was made before the BUP and before we decided on the crossing angle and lower luminosity etc.).

 

Pg 20 – You could consider showing the published PHENIX result for context/motivation to these plots, see PRC 99, 044912 (2019).

 

Pg 21 – I would change the wording from “tension exists between nPDF models” to “nPDFs unconstrained at low Q^2”. These plots were intended to show this, as well as the fact that the A dependence of nPDFs is largely unconstrained (for which RHIC is a great place to try and study the A dependence due to the versatility of the accelerator).

 

Pg 25 – I would remove “(new)” after charged hadrons in the nuclear modification bullet – sPHENIX should be able to measure to higher pT (which is maybe what you meant), but charged hadron R_pAs have been measured at both PHENIX and STAR.

 

Pg 25 - In the very last bullet, maybe change PDF to nPDF to emphasize the nuclear aspect.

 

 

 

---------------------------

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: sPHENIX-cold-QCD-l <sphenix-cold-qcd-l-bounces AT lists.bnl.gov> on behalf of Desmond Shangase <dshangas AT umich.edu>
Date: Wednesday, October 21, 2020 at 1:47 PM
To: "sphenix-cold-qcd-l AT lists.bnl.gov" <sphenix-cold-qcd-l AT lists.bnl.gov>
Subject: [EXTERNAL] [Sphenix-cold-qcd-l] Cold QCD Slides for RHIC/AGS AUM

 

Dear Cold QCD members,

 

Attached are the slides I will be presenting during the Cold QCD workshop tomorrow afternoon.  Please let me know whatever comments you have and if there is anything that I am overlooking.  Some updates that I am working on right now are:

-The inclusion of a slide introducing the Sivers distribution

-Updated gamma-jet plots

 

Bearing this in mind, feel free to point out any other issues that you come across.

 

Best Regards,

Desmond Shangase

PhD Candidate - Physics

University of Michigan - Ann Arbor