STAR Correlations and Fluctuations PWG

[Nu Xu <nxu AT lbl.gov>]

Dear Rutik,
Somehow the link to drupal does not work.
Please fix it asap.

Thank you,
Nu

> On Feb 8, 2024, at 9:04 AM, Rutik Manikandhan <manikandhan.rutik AT gmail.com> 
> wrote:
> 
> Hello Somadutta and Conveners,
> 
> I have made the changes accordingly, thank you for the input!
> link: https://drupal.star.bnl.gov/STAR/system/files/WWND_2024_ver3.pdf
> 
> Best,
> Rutik Manikandhan
> PhD Candidate, Experimental High Energy Group
> Physics Dept.
> University of Houston
> 
> 
> On Thu, Feb 8, 2024 at 8:32 AM Somadutta Bhatta 
> <somadutta.bhatta AT stonybrook.edu> wrote:
> Dear Rutik,
> 
> Thank you for sharing your nice slides for WWND.
> I have a few comments on claims about the independent superposition 
> scenario (particle production from uncorrelated sources) at 200 GeV and 
> 2.76 TeV made in Slide 17 and 18 of your presentation.
> 
> Your slides have the following statements:
> Slide 17: Power law seems to describe the data at 200 GeV, implying an 
> independent sources scenario
> Slide 18: STAR 200 GeV and ALICE 2.76 TeV follow power law (b=-0.5). 
> 
> In previous publications from STAR/ALICE studies of mean pT fluctuations 
> (at 200 GeV and 2.76 TeV), they have reported the existence of genuine 
> correlations beyond the independent sources scenario. A power-law fitting 
> parameter of exactly -0.5 implies that the produced particles are from 
> independent pp-like sources, whereas, any value of the parameter larger 
> than that implies the existence of genuine dynamical correlations in excess 
> of independent superposition.
> 
> In the ALICE paper (Fig 5 in 
> https://urldefense.com/v3/__https://arxiv.org/pdf/1407.5530.pdf__;!!P4SdNyxKAPE!ERkmF-BEnsbYKNcodZhEE9tORf4653y-scxckgLPMVx-AO4aD5UcFhQd9-NHMs7G5iNf7zTLLwXOL-OINhU$
>  ), the power-law fitting for sqrt(K2) reports a value of power-law 
> exponent ~0.45 at 2.76 TeV, whereas, STAR measurements (Fig 3 in 
> https://urldefense.com/v3/__https://arxiv.org/pdf/nucl-ex/0504031.pdf__;!!P4SdNyxKAPE!ERkmF-BEnsbYKNcodZhEE9tORf4653y-scxckgLPMVx-AO4aD5UcFhQd9-NHMs7G5iNf7zTLLwXOhrHbGXo$
>  ) reports significantly larger correlations than HIJING calculations 
> (HIJING is expected to follow independent superposition exactly, see 
> https://urldefense.com/v3/__https://arxiv.org/pdf/2112.03397.pdf__;!!P4SdNyxKAPE!ERkmF-BEnsbYKNcodZhEE9tORf4653y-scxckgLPMVx-AO4aD5UcFhQd9-NHMs7G5iNf7zTLLwXOWC227Ts$
>  ). A HIJING model comparison is also shown in the ALICE paper as well with 
> the same conclusion.
> 
> These observations imply that particle production in data is not only from 
> uncorrelated sources and that there exists genuine dynamical correlations 
> at 200 GeV as well as 2.76 TeV deviates from independent superposition.
> Therefore,  I think claiming that  "STAR 200 GeV and ALICE 2.76 TeV follow 
> power law"  might be misleading and needs to be fixed on the slides.
> 
> Warm regards,
> Som
> 
> On Thu, Feb 8, 2024 at 8:38 AM Rutik Manikandhan via Star-cf-l 
> <star-cf-l AT lists.bnl.gov> wrote:
> Hello Conveners,
> 
> Here is the updated version of the talk: 
> https://drupal.star.bnl.gov/STAR/system/files/WWND_2024_ver_2.pdf
> 
> Best,
> Rutik Manikandhan
> PhD Candidate, Experimental Nuclear High Energy Group
> Physics Dept.
> University of Houston
> 
> 
> On Wed, Feb 7, 2024 at 9:10 AM Rutik Manikandhan 
> <manikandhan.rutik AT gmail.com> wrote:
> Hello Conveners,
> 
> Here is the updated version of the talk for WWND 2024.
> https://drupal.star.bnl.gov/STAR/system/files/WWND_2024_ver1.pdf
> Best,
> Rutik Manikandhan
> PhD Candidate, Experimental High Energy Group
> Physics Dept.
> University of Houston
> 
> 
> On Sun, Feb 4, 2024 at 7:51 PM Nu Xu <nxu AT lbl.gov> wrote:
> Hi Rutik,
> 
> I read your draft already but did not write to you because we will discuss 
> on Thursday.
> Regards,
> Nu
> 
> > On Feb 4, 2024, at 5:27 PM, Rutik Manikandhan 
> > <manikandhan.rutik AT gmail.com> wrote:
> > 
> > Hello Nu,
> > Could you please review my talk for WWND?
> > Thank you!
> > Best, 
> > Rutik Manikandhan
> > PhD Candidate, Experimental High Energy Group
> > Physics Dept.
> > University of Houston
> > 
> > 
> > ---------- Forwarded message ---------
> > From: webmaster--- via Star-cf-l <star-cf-l AT lists.bnl.gov>
> > Date: Thu, Feb 1, 2024 at 2:18 PM
> > Subject: [Star-cf-l] STAR presentation by Rutik Manikandhan for WWND 2024 
> > submitted for review
> > To: <star-cf-l AT lists.bnl.gov>
> > CC: <webmaster AT star.bnl.gov>
> > 
> > 
> > Dear star-cf-l AT lists.bnl.gov members,
> > 
> > Rutik Manikandhan (manikandhan.rutik AT gmail.com) has submitted a material 
> > for  
> > a review, please have a look:
> > https://drupal.star.bnl.gov/STAR/node/66691
> > 
> > Deadline: 2024-02-11
> > ---
> > If you have any problems with the review process, please contact  
> > webmaster AT www.star.bnl.gov
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> 
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> 
> -- 
> Thanking You,
> 
> Yours Sincerely,
> Somadutta Bhatta,
> Relativistic Heavy Ion Group,
> Stony Brook University
>