STAR HardProbes PWG

["Ma, Rongrong" <marr AT bnl.gov>]

Hello Isaac

Thanks for addressing my comments. The new version reads quite nice. I have a 
few final comments: 

ABSTRACT:
- dependence of energy loss on the collision geometry -> dependence of energy 
loss on the path length

MOTIVATION
- eccentricity, ε -> eccentricity (ε)

CHARGED-HADRON SPECTRA COMPARISONS
- Rephrase the second bullet: "Systematic uncertainty on spectrum ratio: 
compare East, West (weak correlation — left fig.)"

Best
Rongrong

> On Aug 29, 2023, at 11:56 PM, Mooney, Isaac via Star-hp-l 
> <star-hp-l AT lists.bnl.gov> 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:
>> https://drupal.star.bnl.gov/STAR/node/64863
>> 
>> Deadline: 2023-09-03
>> ---
>> If you have any problems with the review process, please contact  
>> webmaster AT www.star.bnl.gov
>> _______________________________________________
>> Star-hp-l mailing list
>> Star-hp-l AT lists.bnl.gov
>> https://lists.bnl.gov/mailman/listinfo/star-hp-l
>> _______________________________________________
>> Star-hp-l mailing list
>> Star-hp-l AT lists.bnl.gov
>> https://lists.bnl.gov/mailman/listinfo/star-hp-l
> 
> _______________________________________________
> Star-hp-l mailing list
> Star-hp-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/star-hp-l