STAR GPC #355

["Feng, Yicheng" <feng216 AT purdue.edu>]

Hi GPC, 

I just got the comments from ACU group several hours ago through a private email. 

Due to some miscommunications, this email didn't appear in the Starpapers list. 

We tried to implement those comments and modified the short paper accordingly, 

which can be found on the drupal webpage

https://drupal.star.bnl.gov/STAR/blog/fengyich/Background-Baseline-CME-Isobar-Collisions-Webpage

→reply to comments: https://drupal.star.bnl.gov/STAR/system/files/Reply_InstRev_IsobarNfBkg_20230818.pdf

→revised short paper: https://drupal.star.bnl.gov/STAR/system/files/IsobarNfBkg_S_v21.pdf

    latexdiff: https://drupal.star.bnl.gov/STAR/system/files/diff_IsobarNfBkg_S_v18v21.pdf

    latexdiff for the latest changes only: https://drupal.star.bnl.gov/STAR/system/files/diff_IsobarNfBkg_S_v20v21.pdf

If possible, I'd like to get those to starpapers by Saturday noon.

Sincerely,

Yicheng

---

From: Jim Drachenberg <jld00a AT acu.edu>
Sent: Friday, August 18, 2023 9:49 PM
To: Feng, Yicheng <feng216 AT purdue.edu>
Subject: Fwd: Request for institutional review: (GPC #355): "Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at the BNL Relativistic Heavy-Ion Collider"

 

---- External Email: Use caution with attachments, links, or sharing data ----

Begin forwarded message:

From: Jim Drachenberg <jld00a AT acu.edu>

Subject: Re: Request for institutional review: (GPC #355): "Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at the BNL Relativistic Heavy-Ion Collider"

Date: August 15, 2023 at 10:09:12 PM CDT

To: Frank Geurts <geurts AT rice.edu>

Cc: Donald Isenhower <isenhowe AT acu.edu>, Michael Daugherity <mike.daugherity AT acu.edu>, Joseph Atchison <jia08a AT acu.edu>

Hi Frank,

Thank you for the opportunity to review these important and interesting papers. Here are our comments on the PRL draft. We will send our comments on the PRC draft in about a week.

Regards,

Jim for the ACU group

========

Congrats to the PAs on a very interesting analysis. We think the manuscript is in decent shape, and we hope our comments will help to strengthen it.

Line 1: Do we need to specify “BNL” before “Relativistic Heavy-Ion Collider”?

Line 7: Here, you write “relativistic heavy ion collider.” In line 41 (and in the title) you write it “Relativistic Heavy-Ion Collider.” We think these should be consistent, and suggest adopting the convention of line 41 (and the title). Also, since you otherwise do not use the acronym “RHIC" in the abstract and also define it in the text, we suggest that you drop the “(RHIC)," here.

Line 13: “that is” —> “which are”

Line 14: insert “the” before "\Delta\gamma / v_2 ratio"

Line 26: drop the comma after "[2-5]”

Line 41: “Collide” —> “Collider”

Line 42: Since you do not use it elsewhere, we suggest dropping “(LHC).”

Lines 43ff: Consider revisiting this block of text, since the manuscript is meant for a more general audience. As currently written, a reader may wonder why we expected background cancellation from isobar collisions if “such differences were predicted by energy density functional calculations.” It might be worth providing a bit more context, e.g.,
- isobar collisions were suggested as a means to cancel backgrounds based upon the “initial expectation" that backgrounds would cancel due to the identical mass numbers
- contrary to these initial expectations, species-specific differences were observed in the muliptlicities and elliptic flow
- one explanation is that they stem from the different nucleus sizes, as predicted by energy density functional calculations
- we revisit the initial analysis with the benefit of this new insight

Also, Lines 43ff: Should we mention explicitly that these data were collected by STAR? We mention RHIC and reference STAR papers, but we do not specifically mention STAR until the analysis cuts in Line 128, where we refer to the TPC.

Line 43-46: Consider a slight rewording, e.g.,

"To eliminate background contributions, RHIC produced collisions of isobars, ^96_44 Ru+ ^96_44 Ru and ^96_40 Zr+ ^96_40 Zr, at center-of-mass energy, \sqrt{s} = 200 GeV, in 2018."

Line 47: “those collisions” —> “isobar collisions”

Line 51: “…isobar data shows…” —> “…isobar data show…”

Line 52: “…are not equal in background…” —> “…have different background contributions…”

Line 126: The wording about the vertex cut is a little confusing, especially for a general audience. Perhaps something like,

“These include, among others, restricting the longitudinal location of the primary collision vertex to within -35 cm and +25 cm of the center of STAR…”

Since you reference the paper, rather than giving the quantitative details, you may also consider simply emphasizing the purpose of these cuts, e.g., “These include, among others, requiring the primary collision vertex be near the center of STAR and restricting analysis to high-quality tracks that trace back near to the primary collision vertex.” The long paper should have more room to give quantitative details, but we think you could be more brief in this paper, if you so choose.

Line 142: “uncertainty” —> “uncertainties”

Line 163: “…applied Gaussian fit…” —> “…applied Gaussian fits…”

Line 165: “…value ranges 18-34%…” —> “…value ranges from 18-34%…”

Line 183: End the sentence after [31]. Make the rest a new sentence.

Line 187: “humongous” —> “substantial”

Line 188: Include a reference for HIJING, here.

Line 196: End the sentence after [31] and begin a new sentence.

Line 205: End the sentence after “TPC” and begin a new one.

Line 212: End the sentence after “isobar” and being a new one.

Line 215: End the sentence after “-1.3%” and begin a new one.

Line 227: “added up” —> “summed”

Line 231: End the sentence after “data” and begin a new one.

Again, congratulations to the PAs on a very interesting analysis. We appreciate the opportunity to review this important manuscript.

========

On Aug 4, 2023, at 2:52 AM, Frank Geurts <geurts AT rice.edu> wrote:

Thanks Jim!

-Frank

On Aug 3, 2023, at 2:42 PM, Jim Drachenberg <jld00a AT acu.edu> wrote:

Hi Frank,

I think we can do that. Thanks!

Grace and peace,
Jim

On Aug 1, 2023, at 6:56 AM, Frank Geurts <geurts AT rice.edu> wrote:

Dear Jim,

We would like to request ACU as one of the institutional readers for the short and accompanying long paper, detailed below. 

Since this is a combination of two papers, we request that you provide the comments for the short paper (PRL) by August 15 (2 weeks), and your comments for the long paper (PRC) by Aug 22 (3 weeks).

I appreciate your help in this important process of vetting these STAR papers. Please don't hesitate to let us know if you have any concerns about our request.

Best regards,

-Frank

Dear Colleagues,

We are pleased to announce that the short and long papers (both part of GPC #355) on the post-blind isobar CME analysis are ready for collaboration review. The PAs have indicated that they would like to submit their manuscript before the QM’23 conference. On behalf of the PAs, we hope the collaboration can help in a timely review.

Intended Journals: PRL and PRC

Web-site:
https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/blog/fengyich/Background-Baseline-CME-Isobar-Collisions-Webpage__;!!BuQPrrmRaQ!mZMfibRLfU0AbOJfGNc2JppGna_GE1oEaSos86AbneiLLi2N3Er8k58LU0c0-EipYgiH1gN2Vcvdb1nWqhe9TqJR$ 

Manuscripts:
PRL: https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/system/files/IsobarNfBkg_S_v18.pdf__;!!BuQPrrmRaQ!mZMfibRLfU0AbOJfGNc2JppGna_GE1oEaSos86AbneiLLi2N3Er8k58LU0c0-EipYgiH1gN2Vcvdb1nWqolRMZ_Y$ 
PRC:  https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/system/files/IsobarNfBkg_L_v18.pdf__;!!BuQPrrmRaQ!mZMfibRLfU0AbOJfGNc2JppGna_GE1oEaSos86AbneiLLi2N3Er8k58LU0c0-EipYgiH1gN2Vcvdb1nWqrpeEmjs$ 

Analysis Note:
https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/starnotes/private/PSN0811__;!!BuQPrrmRaQ!mZMfibRLfU0AbOJfGNc2JppGna_GE1oEaSos86AbneiLLi2N3Er8k58LU0c0-EipYgiH1gN2Vcvdb1nWqvG-3W_4$ 

Analysis Code:
$CVSROOT/offline/paper/psn0811

We would like to take this opportunity to thank all the Principal Authors and the members of the GPC for their efforts in preparing and reviewing this paper for release to the collaboration.

Principal Authors: Yicheng Feng, Fuqiang Wang

GPC Members: James Dunlop (chair), Yu Hu (Member at large), Sevil Salur (English QA), Ankita Nain (Code QA), Prithwish Tribedy (PWG Rep), Yicheng Feng (PA Rep) 

We are working with the PAC to determine the five institution readers.

Council representatives: the author list will be inserted once a decision to publish has been given by the journal, until then it will be listed on arXiv under “The STAR Collaboration."


Frank and Lijuan




______________________________________________________
Frank Geurts   (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
T.W. Bonner Nucl. Lab.          • Dept. of Physics & Astronomy
office 713-348-5314             • web http://heavyions.rice.edu

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