STAR HardProbes PWG

[Barbara Trzeciak <barbara.trzeciak AT gmail.com>]

Hi Nihar,

I think the theory CNM models compare to pA data, so what we need are precise data in these small systems.

Then the CNM effects can be factorized (at least most of them at mid-rapidity) to quantify the CNM effects in AA collisions, and distatagle in this way the hot medium effects.

Cheers,

Barbara

On Fri, Feb 23, 2024 at 10:33 AM Nihar Sahoo <nihar AT rcf.rhic.bnl.gov> wrote:

Hello Barbara,

What I mean here that to have better model of the CNM effects, Theorist
need a comparison between pAu and Au+Au collisions.
Please see summary of our STAR paper
https://arxiv.org/pdf/2110.09666.pdf
"... to quantify the CNM effects experienced by the J/ψ meson in p+Au
collisions."

Best
Nihar


On 2024-02-23 13:44, Barbara Trzeciak wrote:
> Hi Nihar,
>
> thanks, I have one more question:
> - s7: "p+Au vs. Au+Au: Comparison helps to quantify the CNM effect" -
> I don't think I understand how we quantify CNM effects by the
> comparison ?
>
> Cheers,
> Barbara
>
> On Fri, Feb 23, 2024 at 8:36 AM Yi Yang <yiyang0429 AT gmail.com>
> wrote:
>
>> Hi Nihar.
>>
>> I don't have any further comments, thanks a lot.
>>
>> Cheers,
>> Yi
>>
>> On Fri, Feb 23, 2024 at 1:20 PM Nihar Sahoo
>> <nihar AT rcf.rhic.bnl.gov> wrote:
>>
>>> Hello Barbara and Yi,
>>>
>>> Thank you for your fine tuning comments and suggestions. I have
>>> implemented those.
>>>
>>
> https://drupal.star.bnl.gov/STAR/presentations/QWG-2024/Recent-heavy-flavor-results-heavy-ion-collisions-STAR
>>>
>>> Barbara's following comment:
>>>> s6: I would remove this slide and add the new polarization
>>> results,
>>>
>>> I know you and Rongrong suggested me to include new Jpsi
>>> polarization
>>> results, but I find my self a bit uncomfortable to include that
>>> result
>>> and also time constraint to explain the result. So I would prefer
>>> not
>>> to include. Nasim is presenting pp published results.
>>>
>>> Thank you
>>> Nihar
>>>
>>> On 2024-02-23 08:39, Yi Yang wrote:
>>>> Hi Nihar,
>>>>
>>>> Thanks a lot for the updated version. I agree with Barbara's
>>>> additional comments.
>>>>
>>>> Cheers,
>>>> Yi
>>>>
>>>> On Thu, Feb 22, 2024 at 6:33 PM Nihar Sahoo
>>> <nihar AT rcf.rhic.bnl.gov>
>>>> wrote:
>>>>
>>>>> Hello Yi,
>>>>>
>>>>> Thank you for your comments. I have implemented all your
>>> comments
>>>>> and
>>>>> modified my slides a bit in version-2.
>>>>>
>>>>>
>>>>
>>>
>>
> 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 2024-02-22 08:50, Yi Yang wrote:
>>>>>> 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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>>>>>>>>
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