STAR HardProbes PWG

[Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>]

Hello Yan,

Thank you for implementing some of my comments. Please find my follow up 
and some additional comments.

> For:
> Title:
> Measurement of quarkonium production and polarization with the STAR
> experiment
> ->  I find this was your title "Beam energy and system size dependence
> of heavy flavor production at STAR"
> And also it sounds more informative than what you have now.
>
> > the presentation include sequention suppression for psi2s and uplison,
> > jpsi polarization, energy and system size dependence. I think the
> > title "Beam energy and system size dependence of heavy flavor
> > production at STAR"  don't include sequention suppression for psi2s
> > and uplison,jpsi polarization.

I don't have any strong suggestion on it. It is up to you.

> For:
> slide5
> What about 200 GeV?
> > we think no significant pt dependence for 200GeV(STAR Collaboration,
> > Phys. Lett. B 797 (2019) 134917)
>
> I think one important observation : R_AA approaches to unity at beam
> energy around p_T 3-4 GeV/c.
> > I konw at 14.6 and 27GeV(p_T 3-4 GeV/c.) result close to 1, I thinks
> > It's hard to say because the larger statistical error(we can see
> > 19.6GeV result(at p_T 3-4 GeV/c.) about 0.6 not 1)

As you mentioned above two,
1) At 200 GeV, no significant pt dependence
2)  lower energies mainly at 27 and 14.6 GeV, strong pT dependence

I can see the trend is different for 200 GeV in comparison with 
(significant pT dependence) 27 and 14.6 GeV. I think we need to point 
this out.

Additional:

Slide4:
_ Sequential suppression study J/𝜓, 𝜓(2S), Υ(1S), Υ(2S) -> Sequential 
suppression of J/𝜓, 𝜓(2S), Υ(1S), and Υ(2S)

Slide5:
Left fig: Legend "54.4, 0-60%, GeV" -> "54.4 GeV, 0-60%"

Slide7:
Title. "isobaric collisions" -> isobar collisions [same for other 
slides]

SLide8:
_Significant suppression is observed at large 𝑁_part range -> 
Significant suppression is observed at large <𝑁_part> range
_"at RHIC" -> remove it , not needed

Slide 10:
_ pp reference -> p+p reference

Plots in  SLide10 and 11, are the same. You may consider to put in one 
slide and make physics statement. But it is up to you.

Slide11:
Centrality dependence trend seems be closer to that at SPS than at LHC 
-> Not a clear statement.
"Clear centrality dependence trend seen at SPS and RHIC energy than at 
the LHC"

Then you don't need this bullet "The double ratio decreases towards 
central collisions".
You could remove it.

SLide14:
You need to put full expression of polarization terms. See Dandan 
poster's motivation.
You need to define what is "λ_inv"?
And also you need to say about it in this slide. Like,
"λ_inv shows consistency between HX and CS frames" . [Same for SLide15]
It is an important observation.


Slide16:

"Polarization parameters 𝜆𝜃,𝜆𝜙 consistent with zero" -> Polarization 
parameters 𝜆𝜃,𝜆𝜙 and λ_inv are consistent with zero, within uncertainty"

Cheers
Nihar










On 2023-08-30 11:47, wy157543 AT mail.ustc.edu.cn wrote:
> Hi Nihar,
>
> Thank you for nice comments,I'll take most of them, but there are a
> few details that need explaining
>
> For:
> Title:
> Measurement of quarkonium production and polarization with the STAR
> experiment
> ->  I find this was your title "Beam energy and system size dependence
> of heavy flavor production at STAR"
> And also it sounds more informative than what you have now.
>
> the presentation include sequention suppression for psi2s and uplison,
> jpsi polarization, energy and system size dependence. I think the
> title "Beam energy and system size dependence of heavy flavor
> production at STAR"  don't include sequention suppression for psi2s
> and uplison,jpsi polarization.
>
> For:
> slide5
> What about 200 GeV?
> we think no significant pt dependence for 200GeV(STAR Collaboration,
> Phys. Lett. B 797 (2019) 134917)
>
> I think one important observation : R_AA approaches to unity at beam
> energy around p_T 3-4 GeV/c.
> I konw at 14.6 and 27GeV(p_T 3-4 GeV/c.) result close to 1, I thinks
> It's hard to say because the larger statistical error(we can see
> 19.6GeV result(at p_T 3-4 GeV/c.) about 0.6 not 1)
>
> For:
> Slide11: "Centrality dependence seems be closer to that at SPS than at
> LHC" -> It is not clear from this figure. Please rephrase exactly what
> you want to say
>
> I mean the isobar reslult trend close to NA50(sps) result,So I add the
> "trend", Thanks for reminding.
>
> Slide17:
> You need to introduce "ETOF, EPD"
>
> I thinks there is not enough time to discuss these in detail,so I 
> remove it.
>
>
> best,
> Yan
>
> > -----原始邮件-----
> > 发件人: "Nihar Sahoo via Star-hp-l" <star-hp-l AT lists.bnl.gov>
> > 发送时间: 2023-08-28 11:19:01 (星期一)
> > 收件人: "STAR HardProbes PWG" <star-hp-l AT lists.bnl.gov>
> > 抄送: "Nihar Sahoo" <nihar AT rcf.rhic.bnl.gov>, webmaster AT star.bnl.gov
> > 主题: Re: [Star-hp-l] STAR presentation by Yan Wang for Quark Matter 
> > 2023 submitted for review
> >
> > Hello Yan,
> >
> > Please find my comments on your nice presentation slides.
> >
> >
> > Title:
> > Measurement of quarkonium production and polarization with the STAR
> > experiment
> > ->  I find this was your title "Beam energy and system size dependence
> > of heavy flavor production at STAR"
> > And also it sounds more informative than what you have now.
> >
> > Slide:2
> > probe to the -> probe of the Quark-Gluon Plasma (QGP)
> > Hot medium effects -> Hot QCD medium effects
> >
> > Slide:4
> > Upper plot's x- and y-axis title and label are very small and will not
> > be visible. Either increase their size or add texts.
> >
> > Slide:5
> >
> > _Left and right figures: Put "STAR preliminary" label inside .
> > _ Legend "54.4 (STAR preliminary)…" is not needed. Keep as other 
> > energy.
> > Here 14.6-54 GeV/c are all STAR preliminary.
> >     But you need to give reference to 200 GeV
> > _ Left fig: "RAA increases with increasing 𝑝𝑇 for 14.6, 19.6, 27 and
> > 54.4 GeV" -> What about 200 GeV?
> >   I think one important observation : R_AA approaches to unity at beam
> > energy around p_T 3-4 GeV/c
> > You could add one more bullet.
> > _"No significant energy dependence…" -> I would phrase it "No clear
> > energy dependence is observed among 14.6, 19.6, 27, 54.4 and 200 GeV"
> >
> > Slide6:
> > _ Legend "54.4 (STAR preliminary)…" is not needed. Keep as other 
> > energy.
> > Here 14.6-54 GeV/c are all STAR preliminary.
> > _Left and right figures: Put "STAR preliminary" label inside .
> >
> >
> > Slide7:
> > "Consistent with Au+Au results for similar system size" -> Not clear
> > "similar system size". Do you mean Au+Au and Isobar are similar size?
> >
> > Slide10 and 11:
> > Y-axis label, Please increase the size. Or put a separate bigger text 
> > at
> > Y-axis. In the current form, it is not visible.
> > Legends' size are too small. Definitely, audience can not see from
> > distance. Please increase it.
> >
> > Slide11: "Centrality dependence seems be closer to that at SPS than at
> > LHC" -> It is not clear from this figure. Please rephrase exactly what
> > you want to say.
> >
> > Slide13:
> > Please increase the legends' size.
> >
> > Slide16:
> > "No significant collision energy…" -> "No significant collision energy
> > using BES-II data and system…"
> > [Just to draw attention that you have used BES-II energies]
> >
> > Slide17:
> > _You need to introduce "ETOF, EPD"
> > _J/𝜓 𝑅 in Au + Au 17.3GeV for J/𝜓 energy dependence  -> "J/𝜓 𝑅 in Au +
> > Au collisions at 17.3 GeV" is enough
> >
> >
> > Cheers
> > Nihar
> >
> > 

> >
> >
> >
> >
> >
> >
> >
> >
> >
> > On 2023-08-28 00:25, webmaster--- via Star-hp-l wrote:
> > > Dear Star-hp-l AT lists.bnl.gov members,
> > >
> > > Yan Wang (wy157543 AT mail.ustc.edu.cn) has submitted a material for a
> > > review,
> > > please have a look:
> > > https://drupal.star.bnl.gov/STAR/node/64965
> > >
> > > Deadline: 2023-09-03
> > > ---
> > > If you have any problems with the review process, please contact
> > > webmaster AT www.star.bnl.gov
> > > _______________________________________________
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