sPHENIX is a new detector at RHIC.

["Aidala, Christine" <caidala AT bnl.gov>]

Dear Sasha, Ralf, and Sanghwa, 

(I am sending one reply to both the PHENIX and sPHENIX lists).

Thank you for your efforts representing PHENIX and sPHENIX in drafting this 
White Paper, and I hope these comments can still be helpful even though they 
are a day late.  

General comments: 

- I think that some mention of sPHENIX before the Appendix is important.  
Currently L 812 in the Appendix mentions "key opportunities for cold QCD 
measurements" at sPHENIX, but there isn't a single word about this elsewhere. 
 

- In addition, in a similar spirit to much of the "Polarized High-Energy 
Proton Beams" section, text could be added about experience gained through 
sPHENIX that will be valuable to the EIC--experience with MAPS and streaming 
readout come immediately to my mind.  

Below I have some additional minor comments on the document.

Christine
--

L 72 - "charged hadron identification"- I believe this means electron vs. 
hadron separation, rather than pi/K/p identification.  The text should be 
clarified.

L 133 - Should this be 68 pb^-1 per week?

L 185 - Run-XX still needs to be filled in.

L 268 - "in addition, it is smaller in the center of the bunch" - Is this 
referring to the polarization value itself, or to the variation in 
polarization across different parts of the bunch?

L 636-7 - "which will allow a complete understanding of the underlying QCD 
mechanism" - While the 2022 and 2024 forward TSSA measurements will be highly 
valuable, I think this statement is too strong.

L 641 - "leptons" -> "electroweak products" or something similar.


Trivial typos (through p. 7):

L 33 - "maximmal" -> "maximal"

L 136 - "signicant" -> "significant"

L 152 - "pand" -> "and"

L 153 - "spinsalong"

L 180-181 - "fi" missing and line break



-- 
Christine A. Aidala
Professor, Department of Physics 
University of Michigan

-----Original Message-----
From: Phenix-p-l <phenix-p-l-bounces AT lists.bnl.gov> On Behalf Of Alexander 
Bazilevsky
Sent: Tuesday, January 10, 2023 10:44 AM
To: PHENIX-P-L <PHENIX-P-L AT lists.bnl.gov>
Subject: RHIC Cold QCD for LRP

Dear All,

As a part of LRP campaign, a group of people from both STAR and (s)PHENIX has 
accomplished the WP draft for RHIC Cold QCD program, see attached. (s)PHENIX 
was represented by Ralf, Sanghwa and Sasha B. The document is planned to be 
sent to the LRP writing committee.
We'll be happy to get any suggestions/concerns you may have on the draft, 
before Jan 23.

Thanks,

Sasha for the WP writing group.

--
Alexander Bazilevsky
Brookhaven National Laboratory, Bldg. 510D, 2-232 Upton, NY 11973 Tel: 
631-344-3712
Email: shura AT bnl.gov
-------------------------------------------------