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Paper Proposal: Semi-inclusive Direct photon + Jet and π0+Jet Suppression in Au+Au collisions at sqrt(sNN) = 200 GeV in STAR

Updated on Sun, 2024-04-14 22:53. Originally created by nihar on 2019-08-14 08:46.

Title:  Measurement of jet quenching by semi-inclusive γdir+jet and π0+jet distributions in central Au+Au collisions at  sqrt(sNN)=200 GeV

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PAs: NiharRanjan Sahoo [PA Rep] , Derek Anderson, Saskia Mioduszewski, and Peter Jacobs

GPC: Jana Bielcikova (chair), Carl Gagaliardi (Member at large), Jamie Dunlop (English QA), Diptanil Roy (code QA), Hanseul Oh (pwg rep.)  

 (GPC #348, #349)
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Target Journal:  

Long paper: Physical Review C
Short paper: Physical Review Letters

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Abstract:

The STAR experiment at RHIC presents measurements of the semi-inclusive distribution of charged-particle jets recoiling from energetic  direct photon and neutral pion triggers in pp and central AuAu collisions at \sqrtsNN=200 GeV, for jet resolution parameter R=0.2 and 0.5 over a broad kinematic range. Medium-induced jet yield suppression is found to be larger for R=0.2 than 0.5, indicating the angular scale of jet shower modification due to quenching, with suppression magnitude similar for direct photon and neutral pion triggered data. Theoretical model calculations incorporating jet quenching do not describe the full set of measurements. This multi-messenger analysis provides new constraints on the physical mechanisms underlying jet quenching.

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Analysis Note:
Both AuAu and pp analysis
drupal.star.bnl.gov/STAR/blog/nihar/gammajet-and-pi0jet-auau-collisions-analysis-note

Starnotes: PSN0804 (link)
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Paper Draft:

1) Long Paper (PRC):
version-1 link
version-2 link   
version-3 link  
version-4 link 
version-5  link 
version-6  link  
version-7 link  (After addressing Institutional Review, IR, comments) 
version-8 link  (Implementing GPC suggestion on IR comment)
version-9 link  (Sent to Collaboration after PAs' response) arXiv version 

After referee report:
Revised version- link
3rd round PRC version (Apr 11) - link

2)Short Paper (PRL):
version-1 link
version-2 link
version-3 link 
version-4 link   
version-5 link 
version-6 link 
version-7  link (After addressing Institutional comments) 
version-8 link  (Implementing GPC suggestion on IR comment)
version-9 link (Sent to Collaboration after PAs' response) arXiv version 

After referee report:
Revised version - link
Revised version with word count and fig1 update: link 
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Proposed Figures:

Only PRL figures are here:

Figure-1

Figure-2:

Figure-3:

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Summary and Conclusion:
 

  1. This measurement at RHIC of jet quenching based on the coincidence of direct photon and pi0 triggers and reconstructed jets in central \AuAu\ collisions, together with comparison distributions in pp collisions
  2. Significant recoil jet yield suppression is observed for both trigger for R=0.2, with markedly less suppression for R=0.5, providing a new measurement of the angular scale of jet shower modification due to quenching
  3. The jet pT dependence of the yield ratio for R=0.2 and 0.5 in pp collisions provides new insight into jet production mechanisms at low jet pT. This ratio in AuAu collisions likewise provides significant evidence for medium-induced intra-jet broadening within 0.5 radians. 
  4. This multi-messenger analysis provides new constraints on the physical mechanisms underlying jet quenching.

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CVS: 
/offline/paper/psn0804
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PWGC Preview Note: drupal.star.bnl.gov/STAR/system/files/PWGCReviewNote_GammaJet.pdf

PWGC Preview presentation:
drupal.star.bnl.gov/STAR/system/files/GammaJet_PWGCPreview.pdf

Jetcorr PWG comments:

Respons to Raghav (Received on Dec 14, 2022):  Click here 
Respons to Hanseul (Received on Dec 15, 2022):  Click here

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GPC discussion 

16 Jan 2023 meeting minutes: link 

GPC comments on version-2:
PAs' Reply to PRC comments: link
Diff pdf file of PRC draft (between v2 and v3) - link
 
PAs' Reply to PRL comments: link
Diff pdf file of PRL draft (between v2 and v3) - link

GPC comments on version-3:
PAs' reply to PRC comments: link
Diff pdf of PRC (v3 to v4): link

PAs' reply to PRL comments: link
Diff pdf of PRL (v3 to v4): link

GPC comments on version-4:
PAs' reply to both PRL and PRC comments: link

Code QA's report: link

Carl's comment on version-4:
PAs' reply to both PRL and PRC comments: link

James' English QA on version-5:
PAs' reply to both PRL and PRC comments: link

-  -   -   -   -  -  -  - 
After Institutional Review (IR):
xxxxxxxxxxxxxxxxxxx
PRL discussion: 
PRL paper: Diff version from v6 to v7 -  link
Reply to IR comments on PRL v6 paper draft: link

Reply to Jana's comment on IR (xlsx) - link
PAs' responses to GPC members' comment on PRL v7 - link 

Hanseul's additional comments on both PRL/PRC v7- link

xxxxxxxxxxxxxxxxxxxx
PRL paper: Diff version from v7 to v8 - link 
PAs response to GPC comment (by Jul 3rd) - link 
PAs and GPC discussion on IR comments (in xlsx) - link
PAs response to IR (sorted by Name/Institution in pdf) - link 
PAs response to IR (shorted by line-by-line in pdf) - link 
PRL diff version v6 to v9 - link 

PRC discussion:
PRC paper: Diff version from v6 to v7 - link 
Reply to IR comments on PRC v7 paper draft: link 

xxxxxxxxxxxxxxxxxxxx

PRC paper: Diff version from v7 to v8 - link 
PAs response to GPC comment (Round1) - link
PAs and GPC discussion on IR comments (in xlsx) - link 
PAs response to IR (sorted by Name/Institution in pdf) - link 
PAs response to IR (shorted by line-by-line in pdf) - link 

PRC diff version v6 to v9 - link 

Final GPC comments on PRC and PRL Aug21 - link 

xxxxxxxxxxxxxxxxxxxx After Referees' comments received xxxxxxxxxxxxxxx
----17 Dec 2023
PAs' response to PRL referees' comment - link 
PRL Diff version between arXiv and revised - link 
PRL: PAs' response to GPC comment (Dec 17) - link
Revised PAs' responses (Dec 17) - link

PAs' response to PRC referee's comment - link
PRC Diff version between arXiv and revised - link
PRC: PAs' response to GPC comment (Dec 17) - link
Revised PAs' responses (Dec 17) - link 

---- 21 Dec 2023
2nd round GPC comments on PAs' response draft:
PRC:  Reply to GPC-  link
PRC: Implementing GPC comments, Reply to Referees - link

PRL:  Reply to GPC-  link
PRL: Implementing GPC comments, Reply to Referees - link

_______ 12 Jan 2024______
Editor suggested to stick with word counts of PRL
Reply to Edit and Reviewers : lInk
Diff version between resubmitted and revised for word counts : link

__________20 Mar 2024_____
Appeal to PRL Editor: Link  

__________1 April 2024_____
Reply to PRC referees' round 3 comments: Link  
11 Apr, Revised version and submitted to Starpaper: link 

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