STAR HardProbes PWG

["Mooney, Isaac" <isaac.mooney AT yale.edu>]

Hi Rongrong and Nihar,

Rongrong: I addressed your remaining comments in v3 now uploaded.

Nihar: That is because v1 uses 20-60% while v2 uses 20-40%. I sent an email about this responding to my own preliminary approval request email after realizing that the q2 resolution is poor enough above 40% that it increases the systematic uncertainty a lot without dramatically improving statistics. Please let me know if you got it.

Thanks,

Isaac

On Aug 30, 2023, at 12:35 AM, Nihar Sahoo <nihar AT rcf.rhic.bnl.gov> wrote:

Hello Isaac,

I just noticed that in your main key plot in this version 
(https://nam12.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fsystem%2Ffiles%2FQM23Poster_v2.pdf&data=05%7C01%7Cisaac.mooney%40yale.edu%7C536b7af39ee2444ae92c08dba91ae042%7Cdd8cbebb21394df8b4114e3e87abeb5c%7C0%7C0%7C638289705258131670%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Z4xvJ2T4Royh%2BlgW%2F6MYl8L8AyO3zjnHWeyNH7httWA%3D&reserved=0) is 
quite different than your this version 
(https://nam12.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fsystem%2Ffiles%2FQM23Poster_v1.pdf&data=05%7C01%7Cisaac.mooney%40yale.edu%7C536b7af39ee2444ae92c08dba91ae042%7Cdd8cbebb21394df8b4114e3e87abeb5c%7C0%7C0%7C638289705258131670%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=KbI65kZhzgjZXbBV2VTdnx2iWXLOv4IhMHkGQUm%2FrvQ%3D&reserved=0)

in Charged-hadron spectra comparisons:
Your systematic uncertainties are different. Can you please inform me 
what I am missing here?

Thank you
Nihar

On 2023-08-30 09:26, Mooney, Isaac via Star-hp-l wrote:

Hi Rongrong, Nihar, and Yi,

Thanks for your comments. I’ve hopefully addressed everything in v2
now on the node. Please let me know if you have any additional
comments. My responses to some points are below.

Thanks,
Isaac

Rongrong:

MOTIVATION
- The two cartoons above the figure seem to indicate that the nuclear
size changes from central to peripheral collisions. Is this your
intention?

Good catch -- that was not my intention. I don't know how that

happened. Fixed.

THE STAR EXPERIMENT
- It is a bit weird to introduce event plane angle here since it is
not used in the results presented in this poster.

I just added a "(future)" in some places where necessary. Hopefully

that works.
- Also, the q2 value shown in the section "EVENT CHARACTERIZATION" is
calculated within 2.14 < eta < 5.09. Isn't positive eta corresponding
to west side?

Yes, I had the rapidity range correct and the text "East" and "West"

flipped in the "The STAR Experiment" section. Nominally I select q2
from the west (positive) side. Fixed.

EVENT CHARACTERIZATION
- Right figure
-- Put y-axis title in one line

Actually the N_{evts} corresponds to the z-axis of the left figure.

I flipped it 180 degrees to make them more distinct.

TRACK SPECTRA COMPARISONS
- It is not clear why using west EPD, instead of the default east EPD,
to define q2 would assess the uncertainty related to q2 resolution.
They could be multiple effects, such as decorrelation, fluctuation,
EPD resolution, etc, affecting the correlation between east and west
EPDs.

I agree with you, but I guess because all of these things can modify

the physics message we're trying to report it makes sense to address
them all in a systematic uncertainty. Maybe the name of the systematic
should just not be "q2 resolution"? What do you think?
- What do you mean by "Interplay"?

I'm not sure if you mean this rhetorically and want me to add an

explanation to the poster, or if you want me to respond here. I'll go
with the latter but let me know if you want me to add this explanation
to the poster. By interplay I mean: q2 is related to
ellipticity/elliptic flow; events with higher q2 have harder spectra
on average, pointing to an increased radial flow. This correlation is
suggestive of some influence of the initial configuration on the final
flow.

CONCLUSIONS
- The statements "statistical power limits conclusion on high-
quenching" and "Expected to be minimal by average path length
argument" read a bit contradictory. On the one hand, we say the effect
should be very small, while on the other hand we kind of complain that
the statistical precision is not good enough to see quenching.
Actually, why do we expect to see quenching in this observable?

Sorry this was unclear. I didn't mean to suggest there would be jet

quenching or that we would expect it. I just meant if there is some
generic modification to the hard probes, it wouldn't be clear within
our precision. But actually with the 20-40% range where q2 resolution
is better, I think this statement can be removed anyway.

Nihar:
_ (consistent with ALICE) -> ALICE measurement was with respect to
"unbiased" one. But you showed also that they are the same with STAR.
So I think it is Ok, but if you could mention about it that would be
good.

Agreed, it should definitely be pointed out. I will do this verbally

as I present the poster because I think adding it would be a bit too
much text/distracting.

Yi:
The STAR Experiment: I would align the bullets to the left, like
other sections.

I had it this way originally, but I found that it looked a bit weird

because the lines are short so they can't go all the way to the left
of the bubble because then there's a lot of awkward white space, but
if they go in the middle it looks like they should be roughly aligned
with the image underneath. But having them left-justified means the
symmetry of that is broken a bit. Take a look at the new version and
let me know if you actually prefer this. If so I'll keep it.

On Aug 29, 2023, at 12:22 AM, Yi Yang via Star-hp-l
<star-hp-l AT lists.bnl.gov> wrote:

Hi Isaac,

Thanks a lot for the nice poster. I only have two minor comments for
your consideration.
- The STAR Experiment: I would align the bullets to the left, like
other sections.
- Track spectra:
- right ploit: I would replace "STAR" by "data" and put
"STAR Preliminary" on the top.

Cheers,
Yi

On Fri, Aug 25, 2023 at 7:07 AM webmaster--- via Star-hp-l
<star-hp-l AT lists.bnl.gov> wrote:

Dear Star-hp-l AT lists.bnl.gov members,

Isaac Mooney (isaac.mooney AT yale.edu) has submitted a material for
a review,
please have a look:
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Deadline: 2023-09-03
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