STAR HardProbes PWG

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

Hi Tanmay,

Thank you for the update.

Below are comments to your preliminary request, and please post your HP slides asap.

- I see you have in the backup comparison of jet mass to the published one. They look consistent, but could you please add a ratio as well.

And have you checked the other observables that we discussed? Though it's not a priority at this point, please focus on the slides and in case you have time you can go back to this. 

- All plots; instead of drawing a gray band around "STAR" in the legend, please make a separate legend entry for your sys. unc. And enlarge the size of the data markers. 

p_T,const Jets > 2 GeV/c -> constituent pT > 2 GeV/c

- I suggest adding, e.g. after slide 6, a slide where you list all the observables that you analyse with their definitions.

- s12: point on this slide to your studies that you show on slide 18.

- s14: What is the difference between p_T,jet bins and p_jet resolution ? They look like they are probing the same thing. 

- s17,18: I think that the exercise with quark and gluon jets that you did with Pythia8 is important here.

It shows us that the Pythia8 quark jet part describes the data quite well (just the shapes are still broader with PYTHIA 8 quark jets), and the total Pythia 8 distributions are indeed dragged away from the data by the gluon-jet contribution.

Cheers,

Barbara

On Wed, Mar 22, 2023 at 5:19 AM Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Tanmay,

Thank you for finishing your jet shape study.

I have a few comments below.

SLide-9:
1- Your column "All" represents cumulative systematic uncertainty. But
numbers don't look right. Or  have you used highest sys variation of
that bin, if that is case, then you don't need to put another column
with "All". Remove it
2- Do you know why your sys uncertainty for Delta pT,jet^Bin is 0% some
cases?
Please reply these, And we may need to look into your systematic
uncertainty further towards paper proposal.

Slide12:
"This hints towards more gluon-like fragmentation of jets in PYTHIA8
relative to STAR"
We need more study for this statement. Unless you have, let's drop it
now.

Slide-15
  Your column "All" represents cumulative systematic uncertainty. But
numbers don't look right. Or  have you used highest sys variation of
that bin, if that is case, then you don't need to put another column
with "All". Remove it

Please send us your HP2023 presentation ASAP.

Cheers
Nihar


On 2023-03-22 06:15, Tanmay Pani via Star-hp-l wrote:
> Dear all,
>
> Sorry for the delay, please find our preliminary request slides here:
>
> https://drupal.star.bnl.gov/STAR/system/files/PreliminaryRequest.pdf
>
> Page with the plots uploaded:
>
> https://drupal.star.bnl.gov/STAR/blog/tpani/Preliminary-request-plots-Generalized-jet-angularities-and-Differential-jet-shapes
>
> Slides for HP2023 will be following soon
>
> Thanking you,
>
> Tanmay
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