STAR HardProbes PWG

[Grant McNamara <grantmcnamara AT wayne.edu>]

Hi Nihar,

I have only shown figures for k = 0.0 in these slides, as it is a 10 minute talk this is all I will have time to show so I did not see a need to list the k value repeatedly. I have made a point to show that the Q_jet label corresponds to the Q for k = 0.0, hopefully this will make this clearer.

The cartoon on slide 2 is meant just as a generic illustration of the jet production.

I have included the reference to AuAu because this is still one of the main motivations of performing this analysis in pp as well.

The systematics follow the jet mass figures previously shown so to keep consistency with this analysis I think it makes sense to keep these on a linear scale. The systematics that are not visible are also small. In a publication of this analysis I will provide a table.

I have not shown any fit to data, this is a fit to pythia-8 using the templates from pythia-8. I have clarified this on the slide as well.

I have made all the requested changes to plots other than adding k = 0.0, as I previously mentioned I expect that a clarification on slide 5 that Q_jet refers to k = 0.0 will be sufficient.

Best,
Grant McNamara

---

From: Star-hp-l <star-hp-l-bounces AT lists.bnl.gov> on behalf of Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov>
Sent: Monday, October 17, 2022 2:34 AM
To: webmaster AT star.bnl.gov <webmaster AT star.bnl.gov>; STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
Subject: Re: [Star-hp-l] STAR presentation by Grant McNamara for DNP 2022 submitted for review

 

[EXTERNAL]

Hello Grant,

Please find my comments on your nice presentation slides.
I like your Slide#5,13,14 Pythia jet charge plot. Are the κ values the
same as your pp data?


Slide2: Just a comment on your right side cartoon. Is there any
relevance of showing jet2,3 in opposite side to your jet charge
measurement?

Slide3: Infrared, collinear safe -> Infrared-collinear safe or Infrared
and collinear safe

SLide4: "The energy loss in AuAu collisions depends on the flavor of
parton" -> It seems out of the context here as you are focusing on jet
charge in pp collisions; you could mention one motivation for heavy-ion
collisions related to jet charge. Is not it? (Comment: so far no
modification in jet-charge is seen in heavy-ion—at least at the LHC)

Slide5: In plot: mention what collision energy and p+p collisions, etc?
Is this the same "κ=0" value used in the data?

Slide8:
_Make your y-axis label up to -0.1 so that lower cutoff data points can
be visible (similarly for other plots)
_ Please mention what "κ" value is used? Better would be in legend

Slide9:
_Give reference of RooUnfold;
_right slide plot, X-Y axises title should be jet pT (please make
changes).
_Q depends on pT -> Q depends on jet pT
_Requires 4D response -> Requires 4D response for 2D unfolding

Slide10: Do you think it would be good to show semi-log scale (y-axis)
for right side plot? So that all systematic contributions can be visible
clearly. In the linear scale Hadronic corrections, not see at all.

Slide11:
_Make your y-axis label up to -0.1 so that lower cutoff data points can
be visible (similarly for other plots)
_ Please mention what "κ" value is used? Better would be in legend

Slide12:
"Mean shifts to from ~0.22 to ~0.33" -> Do you mean with increasing jet
pT window? Then rephrase "Mean shifts from ~0.22 to ~0.33 with
increasing jet pT"
_ Please mention what "κ" value is used? Better would be in legend

Slide13:
_If your  "κ" value is different than that you used in data, then it
would be good to have a comment/statement on it.
_ Can you please elaborate "Normalized Templates" ? Do you it is
normalized per jet?

Slide14:
_ Can you please elaborate "Fit results" ? Have you done any fitting
with the data on slide12-13? It needs some explanation here.

Slide15:
_Not clear "Different jet resolution parameter R values"; please
explain.
_Provide constraint on quark vs gluon fraction value to improve
simulation - > do you really mean to improve "simulation" here?


Cheers
Nihar






On 2022-10-16 21:48, webmaster--- via Star-hp-l wrote:
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> Deadline: 2022-10-27
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