STAR HardProbes PWG

[Yi Yang <yiyang0429 AT gmail.com>]

Hi Nihar,

Thanks a lot for the nice slides.

I have some minor suggestions on v1 for your consideration. 

 - page 2: baryon density QCD medium --> baryon density in QCD medium 

                I would indicate ccbar is J/psi and bbbar is Upsilon (probably everyone knows that) 

 - page 6: The reference should be "Phys. Lett. B797 (2019) 134917" (the one you put is for RpAu) 

 - page 8: Probably you can also consider to show Ziyue/Te-Chuan's new results here since it still slightly improves the statistics in high pT. 

 - page 10: I would show the Psi(2S) signal (mass plot) instead of the thermometer on the right, but just a suggestion. 

 - page 15 and 16: It would be good to indicate 200 GeV collision energy 

I understand you only have 15 mins, but I would think adding Upsilon in isobar and J/psi at very low pT would be good in the talk. 

 

Cheers,

Yi

On Thu, Feb 22, 2024 at 1:12 AM Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Barbara and Rongrong,

Thank you two for your nice comments.
Based on your comments and suggestion, I modified and restructured my
presentation.
This is a 15min presentation; a few topics I do not add due to time
constraint.

https://drupal.star.bnl.gov/STAR/presentations/QWG-2024/Recent-heavy-flavor-results-heavy-ion-collisions-STAR

Please have a look.

Thank you
Nihar

On 2024-02-21 03:51, Barbara Trzeciak wrote:
> Hi Nihar,
>
> Please find below a few comments from my side.
>
> - Add references to the published results
> - s2: Following up on Rongrong's comment, I would even remove the
> thermometer picture from there. We know it's a very simplified
> picture, and I don't think it's needed for this expert audience.
> By the QGP thermalization I guess you mean the QGP temperature. But
> again, one needs to be careful here, it's not only the static Debye
> screening but the dynamical processes play a role.
> And instead of the heavy flavor motivation that you have now, you can
> say here that there are different process that influence quarkonium
> production: dissociation (both static and dynamical), regeneration +
> cold nuclear matter effects
> - s9: remove "Smaller charm production rate at RHIC"
> - s10: Title: I guess you want to emphasise here isobar collision
> results - I would change the title. The Au+Au results you either show
> on the previous slides or are already old.
> And I would add here (or add a slide before this one) motivating
> studies in smaller isobar collisions, e.g.: study dependence of hot
> nuclear medium effects on medium size and energy density.
> And I would use here a simpler plot that we have, without the LHC
> data.
> - s10: "or/and charm flow in QGP at RHIC" - you mean no or small flow
> ?
> - s11: I would suggest adding the J/psi polarization in isobar
> collisions. If you don't have time, I think it might be more
> interesting in this workshop than the rho00 result.
> - s12: suppression in heavy-ion collisions- > sequential suppression
> in heavy-ion collisions at RHIC
> - s12: remove "Confirms QGP thermalization and Debye screening in
> QGP", I suggest "QGP thermal properties"
> - I'm not sure what you want to say with the second bullet, it's quite
> generic statement
>
> Cheers,
> Barbara
>
> On Tue, Feb 20, 2024 at 10:19 PM Ma, Rongrong via Star-hp-l
> <star-hp-l AT lists.bnl.gov> wrote:
>
>> Hello Nihar
>>
>> Thanks for updating your slides. I have few more comments for your
>> consideration:
>>
>> Slide 1: change the title to "Recent quarkonium results in ..."
>>
>> Slide 2:
>> - here you show the thermometer picture and mention " Debye
>> screening". However, you do not really explain what they are. The
>> second bullet reads more like an open HF introduction.
>> - Given the realization of imaginary part of the potential, I think
>> it is better to say dissociation in general, which includes both
>> static ("Debye screening") and dynamic processes. At least, you
>> should mention dynamical dissociation along with Debye screening.
>> - Throughout the presentation, you mention a few times about "QGP
>> thermalization". Could you elaborate how one connects quarkonium
>> suppression with QGP thermalization?
>> - For Nasim's talk, I think it is better to be titled "quarkonia in
>> p+p"
>> - I think QGP usually stands for Quark-Gluon Plasma
>>
>> Slide 3:
>> - since you do not show any open HF results, I do not think you need
>> the HFT picture
>> - Forward Silicon Track -> FST
>> - Forward EMCal and HCal -> FCS
>>
>> Slide 8
>> - This slide reads like an introduction slide for quarkonia, which
>> should be moved to slide 2?
>> - charm quark dissociation -> quarkonia dissociation
>>
>> Slide 9: I feel this slide should go together with slide 4 which
>> also discusses about energy dependence
>>
>> Slide 10: it is not clear what you want to say about the left
>> figure. The energy dependence has been discussed earlier. If you
>> want to focus on the system size dependence, I have a version of the
>> figure with only 200 GeV collision systems:
>> https://drupal.star.bnl.gov/STAR/system/files/Jpsi_Isobar_AuAu.pdf.
>> Also it is probably better to split this slide into two.
>>
>> Slide 11: our vector meson spin alignment paper concluded that the
>> QGP's global angular momentum, as observed in Lambda polarization,
>> actually contributes very little to the observed vector meson spin
>> alignment. One possible origin is the strong force field, which
>> applies to phi meson and should also apply to Jpsi. This is a main
>> motivation to measure Jpsi spin alignment, I think.
>>
>> Best
>> Rongrong
>>
>> On Feb 17, 2024, at 1:50 PM, Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>
>> wrote:
>>
>> Hello Rongrong,
>>
>> Yes, you are correct. I was diverted a bit from the theme of this
>> workshop.
>> Ok, I corrected those with a discussion of J/psi RAA and v2 from
>> Isobar.
>>
>>
> https://drupal.star.bnl.gov/STAR/presentations/QWG-2024/Recent-heavy-flavor-results-heavy-ion-collisions-STAR
>>
>> Please have a look.
>>
>> Thank you
>> Nihar
>>
>> On 2024-02-16 22:14, Ma, Rongrong wrote:
>> Hello Nihar
>> The invitation is intended for presenting recent quarkonium results
>> in
>> heavy-ion collisions at STAR since it is a quarkonium workshop. So,
>> I
>> think it is probably not so relevant to present open HF results
>> (slides 9-11). Instead, you can consider talking about Jpsi and
>> Upsilon Raa, Jpsi v2, Jpsi polarization in Isobar, for example.
>> Thanks.
>> Best
>> Rongrong
>> On Feb 14, 2024, at 5:33 AM, Nihar Sahoo via Star-hp-l
>> <Star-hp-l AT lists.bnl.gov> wrote:
>> Hello HP-pwg,
>> This is an invited talk from startalk to present at QWG2024 at
>> Mohali, India, on "Recent heavy flavor results in heavy ion
>> collisions at STAR".
>> It would be great to have comment/feedback from hp-pwg. Please have
>> a look.
>> Thank you
>> Nihar
>> On 2024-02-14 15:57, webmaster--- via Star-talks-l wrote:
>> Dear star-talks-l AT lists.bnl.gov members,
>> Nihar Sahoo (nihar AT rcf.rhic.bnl.gov) has submitted a material for a
>> review,
>> please have a look:
>> https://drupal.star.bnl.gov/STAR/node/66782
>> Deadline: 2024-02-26
>> ---
>> If you have any problems with the review process, please contact
>> webmaster AT www.star.bnl.gov
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