STAR HardProbes PWG

[Youqi Song <youqi.song AT yale.edu>]

Hi Nihar,

Thanks for the suggestions! I have updated the slides on drupal. Please see my responses below.

Best,

Youqi

1) I am not using hard-core selection. Maybe in the future if this measurement is to be repeated in heavy ions, then I might add in a hard-core selection for comparison; right now I am using inclusive jets. To clarify and emphasize this more, I have bolded the "full jets" on slide 9.

2) I agree that it will be interesting to repeat the analysis for a different jet R, but I am not sure if I should rush to get this done before the workshop. I can prepare a comparison between different R in PYTHIA/HERWIG simulations, although I might have to put it in the backup. Would you still think that would be something necessary to prepare for? Since this talk is only allocated 13+2 minutes and I already have 12 slides, unfortunately I don't think I would have time to go into details of R-dependence during the talk.

3) I checked the timetable for the workshop, and I am scheduled to be in the same section as Charles. I confirmed with Charles that he would focus discuss r_c at RHIC and the EIC, including studying them as a function of k_T, z and t_f, so I suppose I probably don't need to introduce them in my talk again.I have added on slide 11 that the importance of them is that they are sensitive to pQCD->npQCD transition.

4) I think being able to distinguish different hadronization models is an important step to understand npQCD evolution, so I have added that "This can potentially provide more distinguishing power for different models and help us better understand the npQCD evolution."

On Wed, Oct 25, 2023 at 3:01 AM Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Youqi,

Your slides are very similar with your previous presentations so I do
not have many comments.

However, Please find a few comments on your rc observables.

1) on r_c observable discussion, mainly before slide-10, it would be
good to mention how do you select
  jets in order to calculate r_c. Empasizing if these are "hard core
jets" or "inclusive jets".
  And what is the expectation of using this selection?

2) if there is any impact of jet R selection on r_c.

3) Slide11: what are kT, t_f and z? and why they are important?

4) Slide12: "This can potentially provide more distinguishing power for
different models" -> Is this the main reason to do this study or need to
understand npQCD evolution?



Best
Nihar


On 2023-10-25 06:21, webmaster--- via Star-hp-l wrote:
> Dear Star-hp-l AT lists.bnl.gov members,
>
> Youqi Song (youqi.song AT yale.edu) has submitted a material for a review,
> please have a look:
> https://drupal.star.bnl.gov/STAR/node/65702
>
> Deadline: 2023-11-06
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