Hi Xiaofeng,
Thanks for your mail.
- I’m glad you caught the missing references—thanks! I have now put them in the manuscript, which will be released by Yang Wu soon.
- Yes, it is statistical errors which are plotted. I have now put into the caption the following clarification:
Only statistical errors are indicated, as changing the centrality~\cite{Lisa:2005dd} or transverse mass selection slightly will affect $R_{\rm out}$ and $R_{\rm side}$ similarly; see the text for a discussion of systematic effects, which can shift STAR datapoints,
together, by $\sim5\%$ ($\sim20\%$) for $R_{\rm out}/R_{\rm side}$ ($R^2_{\rm out}-R^2_{\rm side}$).
Cheers,
Mike
Michael Lisa
Professor of Physics
The Ohio State University
From:
Xiaofeng Luo <xfluo.star AT hotmail.com>
Date: Saturday, November 21, 2020 at 1:58 AM
To: "Lisa, Michael" <lisa AT physics.osu.edu>, STAR Correlations and Fluctuations PWG <star-cf-l AT lists.bnl.gov>
Subject: Re: [Star-cf-l] Rout / Rside figure in the STAR FXT paper
Hi Mike,
Thank you for sharing the changes in the paper and the efforts to publish this important paper.
I agree that this is an interesting plot, which could be potentially related to the
QCD phase transition.
I have few suggestions/questions, please those below :
1）In line 852, when describing the trend, the reference 31, 80 and 81 are cited.
The 31 is for BES-I directed flow, 80 is for BES-I CME related charge separation.
81 is for BES-I net-charge fluctuations.
I would suggest to also cite
net-proton fluctuations from BES-I which show interesting energy dependence structures related to Fig.20.
: PRL 112,032302 (2014) and recently submitted : arXiv : 2001. 02852
2) I found the the systematic errors in 200 GeV are large in the plot:
https://drupal.star.bnl.gov/STAR/files/starpublications/214/Fig07.png
But this didn't reflect in the Fig. 20. Am I missing something ?
In Fig. 20, only statistical errors are shown ?
Thank you,
Best Regards,
Xiaofeng
On 2020/11/21 10:37, Lisa, Michael via Star-cf-l wrote:
Hello CF groupies,
As you know, STAR has a paper on flow and HBT in Au+Au at 4.5 GeV, fixed-target configuration, which has submitted to Phys. Rev. C. You have seen on the starpapers list the referee
report, which is relatively straightforward to respond to. As the PAs put together our response, we decided to add another figure, to emphasize the importance of pion HBT radii at this crucial energy.
Even though there is no data on this plot that isn’t in the other figures in the paper, I thought you would like to see it, as it gives a clear picture of the famous “R_out over R_side”
issue. Please look at figure 20 in this pdf file:
https://www.star.bnl.gov/protected/bulkcorr/ywu27/fxtPaperWeb/Fixed-Target_Paper_Proposal_files/GPC273_Draft_2point4point1_FXT.pdf
It is discussed in Section VI.B.3
It’s really nice to have this new low energy point, together with the HADES point from GSI. However, note that we have already published this graph (minus those two points) in our
long BES paper, Phys. Rev. C 92 (2015) 14904. You can see the figure (figure 7) here:
https://drupal.star.bnl.gov/STAR/files/starpublications/214/Fig07.png
Best regards,
Mike
Michael Lisa
Professor of Physics
The Ohio State University
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