STAR HardProbes PWG

[Yi Yang <yiyang0429 AT gmail.com>]

Hi Qian,

I pushed your slides to STAR Talk, Nihar and Isaac can provide further comments there.

Cheers,

Yi

On Sat, Dec 9, 2023 at 11:14 AM tc88qy <tc88qy AT rcf.rhic.bnl.gov> wrote:

Hi Yi,

  Thanks for your sign-off.

Qian Yang

On 2023-12-08 13:27, Yi Yang wrote:
> Hi Qian,
>
> Thanks a lot. I don't have any further comments on your nice slides.
>
> Cheers,
> Yi
>
> On Fri, Dec 8, 2023 at 9:35 AM tc88qy <tc88qy AT rcf.rhic.bnl.gov>
> wrote:
>
>> Hi Yi,
>> Thanks for your nice suggestions. I have implemented all your
>> comments
>> in slides.
>> For the last one, I made a modification on the pT dependence part
>> at
>> the summary page.
>> Please find the new slides in the same webpage.
>>
>> Qian Yang
>>
>> On 2023-12-08 07:17, Yi Yang wrote:
>>> Hi Qian,
>>>
>>> Thanks a lot for the nice slides. I have some minor suggestions
>> for
>>> your consideration.
>>> - p4: observable --> observables
>>> - p9: You didn't mention which dataset you are using.
>>> - p14: The title is overlapped with the STAR Logo
>>> - p17: HIC --> heavy-ion collisions
>>> - p18: you said "no significant pT dependence", but in p10 you
>>> mentioned "Hint of a non-trivial pT dependence at
>>> low-pT range in the HX frame". I think we did this in QM, but now
>> I
>>> think it is a bit contradictory. I would suggest making them
>>> consistent.
>>>
>>> Cheers,
>>> Yi
>>>
>>> On Wed, Dec 6, 2023 at 12:55 PM tc88qy <tc88qy AT rcf.rhic.bnl.gov>
>>> wrote:
>>>
>>>> Hello Nihar，
>>>> Thanks for your comments, please find my rely inline. Also the
>> new
>>>> version has been uploaded.
>>>>
>>>> Qian Yang
>>>>
>>>> On 2023-12-05 11:34, Nihar Sahoo wrote:
>>>>> Hello Qian,
>>>>>
>>>>> Please find my comments on your nice presentation slides.
>>>>>
>>>>> SLide-4:
>>>>> Not sure, what is the purpose of left figure?
>>>>> Left side theory plot is for J/psi polarization in jet where as
>>>> right
>>>>> side is for inclusive J/psi polarization.
>>>>> There are different. The comparison may not be correct. Is not
>> it?
>>>>
>>>> It is not a comparison, but two examples that proved J/psi
>>>> polarization
>>>> is a key observable in p+p to understand the production
>> mechanism.
>>>>>
>>>>> Besides, Left figure for x-axis J/psi FF (zh) where as the right
>>>> data
>>>>> plot x-axis is Jpsi pT.
>>>>> I understand the purpose of left side figure. But I think this
>> may
>>>> be
>>>>> an incorrect comparison to motive the physics.
>>>>>
>>>>> Slide5:
>>>>> More fruitful process related to J/ψ in heavy-ion collisions:
>> ->
>>>>> Leading J/psi production mechanisms in heavy-ion collisions:
>>>>
>>>> There is also dissociation of J/psi in QGP, which is not a
>>>> production
>>>> mechanism and absent in p+p. so I think leading J/psi production
>>>> mechanisms is not that precise.
>>>>
>>>>> Coalescence -> is this "co-mover"?
>>>>
>>>> Co-mover normally used to describe one of the cold nuclear effect
>> of
>>>>
>>>> J/psi suppression.
>>>> For a pair of charm and qnti-charm bonds to a J/psi at the phase
>>>> boundary, we normally used the word coalescence/regeneration.
>>>>
>>>>>
>>>>> SLide6:
>>>>> "J/ψ polarization at small pT,…" -> This discussion, in this
>>>> slide,
>>>>> seems out of context. I would suggest remove this or make it
>> clear
>>>> how
>>>>> this is related with Modification of J/ψ feed-down. Or Am I
>>>>> misunderstood?
>>>>
>>>> I made some modification on this slides. The plots gives an
>> example
>>>> of
>>>> feed-down contribution modification due to the QGP. While this
>> text
>>>> gives prediction of such modification will introduce a J/psi
>>>> polarization.
>>>>
>>>>>
>>>>> Slide13:
>>>>> "Particle by Particle polarization of J/ψ in QGP" -> Not clear
>>>> what is
>>>>> particle-by-particle?
>>>> Yes, it is misleading. I remove this part.
>>>>>
>>>>> Best
>>>>> Nihar
>>>>>
>>>>>
>>>>> On 2023-12-04 21:03, tc88qy via Star-hp-l wrote:
>>>>>> Hi Yi,
>>>>>>
>>>>>> I have uploaded the file again, Please check.
>>>>>>
>>>>>> Qian Yang
>>>>>>
>>>>>> On 2023-12-04 16:07, Yi Yang via Star-hp-l wrote:
>>>>>>> Hi Qian,
>>>>>>>
>>>>>>> I removed the 66133 and we will comment on 66134
>>>>>>> (https://drupal.star.bnl.gov/STAR/node/66134).
>>>>>>> But it seems the file in 66134 is also removed, could you
>> please
>>>>>>> upload again? Thanks a lot.
>>>>>>>
>>>>>>> Cheers,
>>>>>>> Yi
>>>>>>>
>>>>>>> On Fri, Dec 1, 2023 at 10:27 PM webmaster--- via Star-hp-l
>>>>>>> <star-hp-l AT lists.bnl.gov> wrote:
>>>>>>>
>>>>>>>> Dear Star-hp-l AT lists.bnl.gov members,
>>>>>>>>
>>>>>>>> Qian Yang (tc88qy AT rcf.rhic.bnl.gov) has submitted a material
>>>> for a
>>>>>>>> review,
>>>>>>>> please have a look:
>>>>>>>> https://drupal.star.bnl.gov/STAR/node/66134
>>>>>>>>
>>>>>>>> Deadline: 2023-12-15
>>>>>>>> ---
>>>>>>>> If you have any problems with the review process, please
>>>> contact
>>>>>>>> webmaster AT www.star.bnl.gov
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