STAR HardProbes PWG

[Gabe Dale-Gau <gdaleg2 AT uic.edu>]

Dear Nihar,

Thank you for your comments. I have updated the paper draft accordingly and uploaded the new version in the same location as before. Please find individual comment responses below. 

I will update the analysis note in the next few days, thought it was worth sending the new paper version now as you had more substantial comments there. 

Best,

Gabe

 

> L71: You need to show; how your Mixed event and the same event's
> multiplicity distributions are the same, or represent the same
> characteristic events sample. It is important to advocate your mixing
> captures the same characteristics of the same event.
>
> Added: “Events used in the mixing process are pulled directly from
> the sample used in signal. This ensures an identical multiplicity
> distribution between signal and mixed event. Both are limited to
> 0-10\% centrality.”
Please include some plots that they are from the same sample. Like
Multiplicity, pT, eta distributions from both ME and SE.

 

I will produce these plots and update the analysis note soon.

Comments on your paper draft:

- "2. Methods" -> Before this section, you need to introduce what the
STAR experiment, what detectors have been used, datasets for pp and
AuAu, if you have used any trigger events or MB, etc… and name this
"Experimental setup and datasets"
- Also discuss about centrality selection

 

Included a brief paragraph to this point as the first subsection under the “Analysis Procedure”

- "2. Methods" -> I would suggest to change it to "Analysis procedure"
or something similar ; as this section contains many steps, you could
use "subsections" to separate out your steps for the easy reading for
readers. [Subsections are allowed in PLB] For example, i) PID of proton
and pion, ii) Mixed event and same event correlations, iii) extraction
of yield ratio,  and iv) Systematic uncertainty , etc. [you can change
the name as you like]

Changed the title and added subsection labels

 

- Njet -> N_{\rm jet}   [make "jet" roman]

 

Done. Also applied this to all instances of N_{\rm{track}}

- Gev/c -> GeV/{\it c} [L159, 165, etc]

 

I believe all instances already have the italicized “c”.

- "3. Results & Discussion" -> "3. Results and discussion"

 

Changed both here and for “Summary and Conclusions” to preserve uniformity.

- L172: "… for inclusive p+p data …" -> "… for the inclusive hadrons in
p+p collisions"

 

Done.

- L196: "Lowering this parameter introduces additional background that
must be evaluated and corrected." -> this sentence sounds like just
hanging without any continuation or prior information.

 

Changed "Lowering this parameter” to “Lowering the $p^{\rm{const}}_{\rm{T}}$ minimum” to clarify the sentence.

- L197: "Different radii could also be studied to examine a larger
sample of jets, likely possessing a…" -> Not a clear sentence. What is
"larger sample of jets"? "Possession" may not be an appropriate word
choice here.

 

Changed to “Larger radii could also be studied to increase the sample size. However, this increase in number of jets would carry a greater level of medium interaction.”

- L199: "A larger radius is often associated with a higher gluon jet
fraction, however at RHIC energies quark jets dominate, so this likely
is not a factor at play in STAR." -> Do you mean we don't observer
larger radius jet at STAR/RHIC? We observed jet R dependence of
suppression. Probably you want to say, quark jet dominates at RHIC than
gluon jet. If so, Please correct this sentence in terms of q/g jet, not
in terms of larger jet radius.

 

I removed this sentence for now to avoid confusion. I had intended to include this point in anticipation of a comment I have often received on the consideration of different radii – given that gluon jets posses a wider profile than quark jets, as radius is increased the sample can bias towards gluon. However, at this energy our sample is almost entirely quark jets so this consideration is not actually applicable.

_Overall, after reading this draft it seems like we have performed this
measurement proton-pion ratio in jet using jet reconstruction. But in
reality, that is not the case. What we have done is we only use jet axis
(from jet reconstruction) and then perform jet+hadron correlation. Is
not it? If yes, we need to write this manuscript accordingly.
For instance, L211: "a strong preference for pion over proton production
for jets with anti-kT R=0.3,…" here this sentence reads like
proton-to-pion [need to correct this in your sentence] ratio inside
jets. Which is some extend true but not exactly correct. Do you agree?
If yes, please modify all places. Otherwise, please let me know.

 

We strongly disagree with this comment. We measure in-jet proton to pion ratios, exactly as stated in the paper.  It is not true that only the jet-axis is used for our analysis -- getting an estimate on the hard-scattered parton direction could have been done just by a leading hadron.  The main jet finder utility is to provide energy clustering and thus factorize out (to any extent possible) dependence of jet FF, providing a closer connection to parton energy.  The jet-track part of the analysis is relevant for the background subtraction. Any jet substructure analysis (shapes, FF, mass, etc.) in AA collisions employs (must employ!) some form of background subtraction, and jet-track is one of the common means to handle it in multiple published works. Our jet energy scale and jet axis are defined by full jet reconstruction using the now-traditional anti-kT algorithm. We employ a 2-dimensional background subtraction method to accurately capture the underlying event information beneath the jet. The signal that remains is the true jet signal.

On Sun, Jul 28, 2024 at 9:37 AM Nihar Sahoo <nihar AT rcf.rhic.bnl.gov> wrote:

Hello Gabe,

Thank you for implementing and answering my comments.
Please find below my comments on your reply and also on your paper
draft.

> L71: You need to show; how your Mixed event and the same event's
> multiplicity distributions are the same, or represent the same
> characteristic events sample. It is important to advocate your mixing
> captures the same characteristics of the same event.
>
> Added: “Events used in the mixing process are pulled directly from
> the sample used in signal. This ensures an identical multiplicity
> distribution between signal and mixed event. Both are limited to
> 0-10\% centrality.”
Please include some plots that they are from the same sample. Like
Multiplicity, pT, eta distributions from both ME and SE.

Comments on your paper draft:

- "2. Methods" -> Before this section, you need to introduce what the
STAR experiment, what detectors have been used, datasets for pp and
AuAu, if you have used any trigger events or MB, etc… and name this
"Experimental setup and datasets"
- Also discuss about centrality selection

- "2. Methods" -> I would suggest to change it to "Analysis procedure"
or something similar ; as this section contains many steps, you could
use "subsections" to separate out your steps for the easy reading for
readers. [Subsections are allowed in PLB] For example, i) PID of proton
and pion, ii) Mixed event and same event correlations, iii) extraction
of yield ratio,  and iv) Systematic uncertainty , etc. [you can change
the name as you like]

- Njet -> N_{\rm jet}   [make "jet" roman]

- Gev/c -> GeV/{\it c} [L159, 165, etc]

- "3. Results & Discussion" -> "3. Results and discussion"

- L172: "… for inclusive p+p data …" -> "… for the inclusive hadrons in
p+p collisions"

- L196: "Lowering this parameter introduces additional background that
must be evaluated and corrected." -> this sentence sounds like just
hanging without any continuation or prior information.

- L197: "Different radii could also be studied to examine a larger
sample of jets, likely possessing a…" -> Not a clear sentence. What is
"larger sample of jets"? "Possession" may not be an appropriate word
choice here.

- L199: "A larger radius is often associated with a higher gluon jet
fraction, however at RHIC energies quark jets dominate, so this likely
is not a factor at play in STAR." -> Do you mean we don't observer
larger radius jet at STAR/RHIC? We observed jet R dependence of
suppression. Probably you want to say, quark jet dominates at RHIC than
gluon jet. If so, Please correct this sentence in terms of q/g jet, not
in terms of larger jet radius.

_Overall, after reading this draft it seems like we have performed this
measurement proton-pion ratio in jet using jet reconstruction. But in
reality, that is not the case. What we have done is we only use jet axis
(from jet reconstruction) and then perform jet+hadron correlation. Is
not it? If yes, we need to write this manuscript accordingly.
For instance, L211: "a strong preference for pion over proton production
for jets with anti-kT R=0.3,…" here this sentence reads like
proton-to-pion [need to correct this in your sentence] ratio inside
jets. Which is some extend true but not exactly correct. Do you agree?
If yes, please modify all places. Otherwise, please let me know.


Best
Nihar

On 2024-07-10 01:04, Gabe Dale-Gau wrote:
> Dear Nihar,
>
> Thank you for your comments. I have implemented them and updated the
> version of both the analysis note and the paper draft on my drupal
> page. Please find individual comment responses below.
>
> Best,
>
> Gabe
>
> Analysis Note:
>
> L71: You need to show; how your Mixed event and the same event's
> multiplicity distributions are the same, or represent the same
> characteristic events sample. It is important to advocate your mixing
> captures the same characteristics of the same event.
>
> Added: “Events used in the mixing process are pulled directly from
> the sample used in signal. This ensures an identical multiplicity
> distribution between signal and mixed event. Both are limited to
> 0-10\% centrality.”
>
> L72:    The resulting distribution is normalized to unity at maximum.
> ->
> Please elaborate how do you normalize and mention "maximum" of what.
> In
> Fig.1, indicate where is that "maximum". As this is  important for
> this
> analysis, so it should be discussed extensively.
>
> Changed to “The resulting distribution is normalized to unity at
> ME(0,0), where $ME(\Delta\eta,\Delta\phi)$ is the mixed event
> distribution, as described in Eq.[2]. This normalization allows us to
> correct for the pair-acceptance structure that emerges at larger
> $\Delta\eta$ without impacting the small $\Delta\eta$ regime. To
> implement the correction, the signal correlation is divided by the
> mixed event distribution.” To clarify the details of this point.
>
> Section 2.2: Please elaborate how do you perform proton and pion
> identification within jet and Mixed event? You may have mentioned how
> do
> perform PID but not in the jet-hadron correlation and ME/UE, a
> detailed
> discussion will help us to understand the procedure. For instance, how
> do you preserve PID information while doing jet reco or ME or UE.
>
> Addressed this comment in the overview subsection you suggested adding
> at the beginning of this section. The key here is that I keep PID
> information associated with location information for every track, so
> that I can fill all PID histograms alongside the correlation
> histograms. One possible confusion here has to do with the jet
> reonstruction. It is true that fastjet does not preserve PID
> information, but the only information I use from the jet clustering
> output is the jet axis. Once an axis is identified, I return to the
> full event with PID information preserved to perform correlation and
> save histograms in every parameter.
>
> L103: "After subtraction of uncorrelated background, there still
> remains
> further contamination in our jet signal from correlated background."
> But
> you are doing PID measurement, then you need to mention how do you
> preserve PID information while subtracting uncorrelated background.
> That
> part is not clear in the AN.
>
> I believe this is also addressed between the new overview subsection
> and updates in the correlated background overview, Section 3.1. Let me
> know if it is still unclear.
>
> I would suggest before section 2, please include a (sub)section just
> write steps that you followed in this analysis. Then details you go
> through in each section. As this is a new analysis, so a proper
> documentation is warranted.  Similar to your Section 3.1 (I like that
> steps you mentioned, it is easily conceivable)
>
> Added a full subsection titled “overview” at the beginning of the
> analysis section, outlining all analysis steps in the same manner as
> section 3.1.
>
> Section3.1: In these steps, where and how do you select/perform PID.
> Please mention.
>
> Updated to directly name parameters used in this step.
>
> Fig.6: Why your Pseudo-embedding (pp + AuAu) peak heights are lowers
> than pp and AuAu peaks. What I am missing here.
>
> The “pseudo-embedding” peaks shown here are a measure of
> correlated background contribution, so they should be lower than the
> peaks from either jet signal. The distributions extracted from
> pseudo-embedding here do not represent the full combined embedded
> event, but rather only the correlation with AuAu background. This is
> the purpose of pseudo-embedding – to measure how much AuAu
> background is pulled into the signal when running jet reconstruction.
> If I were to create correlations with both the pp and AuAu event, the
> peaks would be comparable to the full AuAu peaks. This could be a good
> cross-check to show that the embedded events are realistic, but it is
> not the purpose of the exercise.
>
> This is mentioned in section 3.1: “Using the post-embedding jet
> location, $\eta^{embed}_{Jet}, \phi^{embed}_{Jet}$, perform
> correlation with only the tracks from Au+Au, identically to how we
> perform correlation in signal. Create histograms in relative location
> and PID parameters; $\Delta\phi$, $\Delta\eta$, $n\sigma_{\pi}$, and
> $m^{2}$.\\”
>
> Section3.2:
> L155 - Randomly sample the nTrack distribution to choose a reasonable
> nTrack value for the mixed event.
> -> You need to be carefully check your random sample of nTracks
> distribution should match with the same event's. Please show the plot
> of
> that comparison whether they are reasonable or not.
>
> Included this figure demonstrating that the distributions are
> identical.
>
> IN these steps, do you perform any PID selection?
>
> The PID distributions are preserved and can be subtracted directly
> from signal. All resulting PID from correlated background is the same
> as PID in bulk.
>
> ___________Paper draft:
>
> Abstract:
> to measure in-jet particle ratios for -> to measure proton over pion
> yield ratio in-jet for [or you need to mention somewhere you report
> proton to pion ratio, no mentioned in the asbtract]
>
> Updated.
>
> Introduction:
> L3: an exotic phase of matter, Quark-Gluon Plasma (QGP),-> need to
> mention what is that exotic phase like hot and dense QCD matter
>
> Added “QGP is novel as it is a hot and dense phase consisting of
> deconfined quarks and gluons.”
>
> L8-12:Some key signatures of QGP observed through such comparisons …
> ->
> you need to provide reference to these observations both RHIC and
> LHC's.
> However, I don't think you have listed all key QGP signatures. And
> "enhancement of relative baryon to meson production" is not a key
> signature of QGP it only indicates coalescence mechanism. If you
> agree,
> please rephrase your sentence.
>
> I believe one of Isaac’s comments addressed this point as well. I do
> not mean the list to be exhaustive, but only to mention _some_ key
> signatures specific to the setup of this paper. I would also argue
> that the presence of coalescence mechanism is a key signature of QGP.
> Coalescence This is what I mean to indicate with my mentioning of the
> "enhancement of relative baryon to meson production". Rephrased this
> sentence to add that clarification.
>
> L28: what extent the hard-scattered parton traversing the medium
> contributes to in-medium coalescence … -> if I understand correctly,
> it
> say hard-scattered parton contribute to coalescence mechanism in the
> medium. But I think we want to study whether coalescence mechanism is
> important in jets originating from hard-scattered parton traversing in
> the QGP and also in vacuum.
> Please correct me if I have mistaken.
>
> I believe the answer here that is it is both. With that sentence I am
> trying to indicate that any modification to jet yield could be due to
> QGP impact on the jet, or the presence of a wake generated by the hard
> scattered parton traversing the medium. Unfortunately it is difficult
> to decouple what contributions come from the original hard scattered
> parton and what contributions are excited from the medium in the
> scheme I have developed, so I leave this up to interpretation.
>
> And "if the QGP presence modifies the particle composition of the jet
> shower." -> It is ok.
>
> Yes this is the other side of the point above.
>
> At end of introduction, you need to include one para about outline on
> each sections.
>
> Added a paragraph to this effect.
>
> On Sun, Jul 7, 2024 at 1:16 AM Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>
> wrote:
>
>> Hello Gabe,
>>
>> Thank you for preparing the paper draft and AN of this new analysis.
>>
>> I have gone through your AN first and commented on your AN and only
>> introduction of your paper draft.
>> I will go though rest of your paper draft once you address my
>> comments
>> in the AN.
>>
>> Analysis Note:
>>
>> L71: You need to show; how your Mixed event and the same event's
>> multiplicity distributions are the same, or represent the same
>> characteristic events sample. It is important to advocate your
>> mixing
>> captures the same characteristics of the same event.
>> L72:    The resulting distribution is normalized to unity at
>> maximum. ->
>> Please elaborate how do you normalize and mention "maximum" of what.
>> In
>> Fig.1, indicate where is that "maximum". As this is  important for
>> this
>> analysis, so it should be discussed extensively.
>>
>> Section 2.2: Please elaborate how do you perform proton and pion
>> identification within jet and Mixed event? You may have mentioned
>> how do
>> perform PID but not in the jet-hadron correlation and ME/UE, a
>> detailed
>> discussion will help us to understand the procedure. For instance,
>> how
>> do you preserve PID information while doing jet reco or ME or UE.
>> L103: "After subtraction of uncorrelated background, there still
>> remains
>> further contamination in our jet signal from correlated background."
>> But
>> you are doing PID measurement, then you need to mention how do you
>> preserve PID information while subtracting uncorrelated background.
>> That
>> part is not clear in the AN.
>>
>> I would suggest before section 2, please include a (sub)section just
>>
>> write steps that you followed in this analysis. Then details you go
>> through in each section. As this is a new analysis, so a proper
>> documentation is warranted.  Similar to your Section 3.1 (I like
>> that
>> steps you mentioned, it is easily conceivable)
>>
>> Section3.1: In these steps, where and how do you select/perform PID.
>>
>> Please mention.
>>
>> Fig.6: Why your Pseudo-embedding (pp + AuAu) peak heights are lowers
>>
>> than pp and AuAu peaks. What I am missing here.
>>
>> Section3.2:
>> L155 - Randomly sample the nTrack distribution to choose a
>> reasonable
>> nTrack value for the mixed event.
>> -> You need to be carefully check your random sample of nTracks
>> distribution should match with the same event's. Please show the
>> plot of
>> that comparison whether they are reasonable or not.
>>
>> IN these steps, do you perform any PID selection?
>>
>> ___________Paper draft:
>>
>> Abstract:
>> to measure in-jet particle ratios for -> to measure proton over pion
>>
>> yield ratio in-jet for [or you need to mention somewhere you report
>> proton to pion ratio, no mentioned in the asbtract]
>>
>> Introduction:
>> L3: an exotic phase of matter, Quark-Gluon Plasma (QGP),-> need to
>> mention what is that exotic phase like hot and dense QCD matter
>> L8-12:Some key signatures of QGP observed through such comparisons
>> … ->
>> you need to provide reference to these observations both RHIC and
>> LHC's.
>> However, I don't think you have listed all key QGP signatures. And
>> "enhancement of relative baryon to meson production" is not a key
>> signature of QGP it only indicates coalescence mechanism. If you
>> agree,
>> please rephrase your sentence.
>>
>> L28: what extent the hard-scattered parton traversing the medium
>> contributes to in-medium coalescence … -> if I understand
>> correctly, it
>> say hard-scattered parton contribute to coalescence mechanism in the
>>
>> medium. But I think we want to study whether coalescence mechanism
>> is
>> important in jets originating from hard-scattered parton traversing
>> in
>> the QGP and also in vacuum.
>> Please correct me if I have mistaken.
>>
>> ANd "if the QGP presence modifies the particle composition of the
>> jet
>> shower." -> It is ok.
>>
>> At end of introduction, you need to include one para about outline
>> on
>> each sections.
>>
>> Thank you
>> Nihar
>>
>> On 2024-07-03 22:10, Gabe Dale-Gau wrote:
>>> HI Isaac,
>>>
>>> Thank you for these helpful comments. I have updated the paper
>> draft
>>> to include all suggested changes and uploaded the new version at
>> the
>>> same location I provided in this email chain.
>>> I am still working to update the analysis note, but thought I
>> would
>>> respond for now with the paper draft changes.
>>> Please find individual comment responses below.
>>>
>>> Thanks,
>>>
>>> Gabe
>>>
>>> Paper draft:
>>>
>>> Title -- lowercase s, upright 'N' subscript (and elsewhere, e.g.
>> end
>>> of introduction).
>>>
>>> Done.
>>>
>>> 8. I would specify "Some key signatures" here so it's clear you
>> don't
>>> mean this to be a comprehensive list.
>>>
>>> Done.
>>>
>>> 38. You go very quickly into analysis techniques (jet-track
>>> correlation, etc.) without discussing the data: e.g. how/when the
>> data
>>> were taken, what the selections are, etc. And it is okay not to go
>> too
>>> in depth on the STAR subsystems you use, but there should then be
>>> links to the relevant NIM paper for each subsystem.
>>>
>>> Added TPC and ToF NIM papers to references. Cited in methods
>> section.
>>>
>>> 42. "radius"
>>>
>>> Done.
>>>
>>> 57. Should it really be "all tracks in an event" or "each track in
>> an
>>> event"? (I.e. how many tracks are paired with each jet axis for
>> the
>>> ME?)
>>>
>>> Changed to “each track in an event”. We see an average of 3 or
>> 4
>>> tracks above 3 GeV in the Au+Au events considered. This number
>> grows
>>> significantly with an adjusted pTconst minimum.
>>>
>>> 69. I don't think it will be clear to the reader how the position
>> of
>>> that circular region is decided. -> "a circular region centered on
>> the
>>> leading jet axis with a radius..." or similar.
>>>
>>> Good point, added this clarification.
>>>
>>> 91. Hmm maybe this is a subtle point, but I would prefer
>> "introduced
>>> when reconstructing jets" or "which must be considered when
>> studying
>>> reconstructed jets" or something. "introduced by the jetfinder"
>> makes
>>> it seem like it's a flaw in anti-kT. Similar comment for l. 89.
>>>
>>> I see what you mean. I changed the phrasing to “reconstructing
>>> jets” so it doesn’t seem aimed at the algorithm.
>>>
>>> 94. "two"
>>>
>>> Ah yes, another typo that evaded me
>>>
>>> 98. It's up to you, but I would recommend something like
>> "p+p\oplus
>>> Au+Au" rather than the parentheses.
>>>
>>> Changed to \oplus for now, we can iterate further on this
>> terminology
>>> if necessary.
>>>
>>> 134. "radius"
>>>
>>> Done.
>>>
>>> 135. I'm not sure what you mean with this sentence. There would
>> also
>>> be a selection on pseudorapidity, for example. By the way,
>> speaking of
>>> that I'm not sure if you ever mention that this is at midrapidity,
>>> right?
>>>
>>> Added a sentence on pseudorapidity selection at line 44 (beginning
>> of
>>> methods).
>>>
>>> Also removed the “leading” terminology, opting instead to say
>>> “only the highest pT jet in each event is considered”
>>>
>>> 142. In the proceedings from HP'23, it was "the hardness of
>>> fragmentation within the sample of jets." whereas now it's "...of
>> the
>>> initial parton scattering within the sample of jets." To me the
>> former
>>> is more correct and I would prefer if it were changed back.
>>>
>>> Changed back for now, I suspect this is a language point that will
>>> need to be changed again as “fragmentation” is a term that
>> often
>>> refers to a specific observable that I do not report. I was trying
>> to
>>> move away from such confusion with the re-phrase. Maybe I can
>> define
>>> terminology earlier in the paper to clarify what is meant by
>>> fragmentation in this context.
>>>
>>> 174. Math 'R' (also 178).
>>>
>>> Done.
>>>
>>> 177. "show that for anti-kT..."
>>>
>>> Done.
>>>
>>> 180. I think you're using the word "hint" here because you don't
>> want
>>> to make too strong a conclusion about the actual physics, given
>> the
>>> extension to be made to e.g. lower pTcons and the caveats e.g. the
>>> leading jet selection bias. But the data that you have don't show
>> a
>>> hint, they show definitively that within precision, there is no
>> baryon
>>> enhancement. So I would reframe slightly to actually make the
>> physics
>>> connection (from baryon enhancement -> medium modification to
>> particle
>>> composition; the enhancement being the observed figure, the
>>> modification to particle composition being the physics effect) and
>>> flip the logic from ~"evidence of no ___" to ~"no evidence of
>> ___":
>>> "We see no evidence for medium modification to...". Then or
>> before,
>>> caveats can be added to that statement as necessary.
>>>
>>> Yeah, this is exactly why I was using the word “hint”. I’m
>> still
>>> not fully certain how strong to make the physics interpretation
>>> statement, but we can work that out in GPC before submitting the
>>> paper. Changed to “no evidence of” for now, will add further
>>> framing moving forward.
>>>
>>> 186. It's not vital for now, but at some point the references will
>>> need a lot of work. Please take a look if you have some time.
>>>
>>> Yeah, I noticed the format is all messed up. I will look into this
>> and
>>> fix it. This is an issue that arose when I implemented the
>> suggested
>>> bibliography style from the PLB website. The style is:
>>> \bibliographystyle{elsarticle-harv}. When I compile using
>>> \bibliographystyle{plain}, I do not have this issue. Either I will
>> see
>>> if the plain style is acceptable for submission, or work within my
>>> bibtex file to trick the references into looking better.
>>>
>>> General:
>>>
>>> Some points that weren't discussed which I think could be were:
>>>
>>> the quark vs. gluon aspect. I know you're not including any radius
>>> dependence, but it may be good to point out that given the
>> kinematics
>>> at STAR and the pTcons selection, you probably have a decently
>> pure
>>> quark-jet sample. Also, it would be nice if there were a bit of
>>> discussion on the reason for the discrepancy between the inclusive
>> pp
>>> (AA) and in-jet pp (AA). You point to the ALICE reference, but I
>> think
>>> more could be said here since it's such a salient feature of the
>> plot.
>>>
>>>
>>> This is a good point. I will work on adding more interpretation
>> for
>>> the p+p discrepancy.
>>>
>>> Added a note on quark/gluon fraction at line 183, will add a
>> reference
>>> to back up this claim.
>>>
>>> It's also a bit light on physics conclusions/takeaways. In e.g.
>> the
>>> summary & conclusions, I think it would be good to make one
>> further
>>> step from what we observe to what it might mean. Of course, it's a
>>> tightrope walk between not making it clear to the reader what
>> physics
>>> we're trying to learn from the study and speculating too much as
>> an
>>> experimentalist. But I thought you did a good job in l. 27 in the
>>> introduction of laying out the physics motivation. You can kind of
>>> repeat that here for the people who skip to the conclusions first,
>> but
>>> saying instead now that we've seen the results "This study
>> addresses
>>> the open question of..., with some evidence that the ... is not
>>> modified by..." My comment on l. 180 actually also would address
>> this
>>> somewhat, now that I think about it.
>>>
>>> Systematics were also never mentioned. You don’t have to get too
>>> technical if you want to keep it streamlined, but something like
>>> “Systematics related to X, Y, and Z were considered, with X
>> being
>>> leading in [insert kinematic range]…”, at minimum, really
>> needs to
>>> be included.
>>>
>>> Added a paragraph at line 136 to cover the basics of systematic
>>> evaluation as suggested.
>>>
>>> Analysis note:
>>>
>>> The proton m^2 fit in the 3 < pT < 3.5 GeV range doesn't look very
>>> good, but I guess this is irrelevant because it's still low enough
>> pT
>>> to be in the bin-counting region, right?
>>>
>>> Yes, I will remake these figures excluding the proton fit, as it
>> is
>>> not used in the analysis. This fit was only employed as an
>> internal
>>> cross-check.
>>>
>>> Thanks for including a clear explanation of the 3-track
>> consideration
>>> for the background studies. I think that will help clear up the
>>> questions of anyone reading through it who didn't read the email
>> chain
>>> earlier.
>>>
>>> Although for the paper it is a choice to either include or not
>> include
>>> some technical details, for the analysis note there are some
>> things
>>> which really need to be included (e.g. run year, dataset,
>> centrality
>>> definition, bad runs, all event, track, jet selections, any
>> relevant
>>> QA plots, etc., etc., etc.). I would almost say the shorter your
>>> paper, the longer your analysis note should be :).
>>>
>>> I will add these details to the Analysis note.
>>>
>>> By the way, speaking of the centrality definition, did you and
>> Tanmay
>>> manage to get the centrality definition for Run 14 that you've
>> been
>>> using made an official part of RefMultCorr?
>>>
>>> We met with the Centrality group a few times about 6 months ago on
>>> this point. They pointed us to the proper tools for building a
>>> centrality definition and we followed the procedure. We have a
>> working
>>> definition that is very similar to the previous productions.
>> However,
>>> I do not think we ever presented the final version to the
>> centrality
>>> group for final approval. I will follow up with Tanmay to make
>> sure we
>>> get this pushed through for approval.
>>>
>>> On Mon, Jul 1, 2024 at 6:05 PM Mooney, Isaac
>> <isaac.mooney AT yale.edu>
>>> wrote:
>>>
>>>> Hi Gabe,
>>>>
>>>> Thanks for the nice draft and analysis note. Sorry for my long
>> delay
>>>> in getting comments back to you. Overall I think the analysis is
>>>> ready to move to GPC review, although I have some general
>> comments
>>>> about the structure of the paper and abstract (none are
>>>> showstoppers).
>>>>
>>>> Thanks,
>>>> Isaac
>>>>
>>>> Paper draft:
>>>>
>>>> Title -- lowercase s, upright 'N' subscript (and elsewhere, e.g.
>> end
>>>> of introduction).
>>>>
>>>> 8. I would specify "Some key signatures" here so it's clear you
>>>> don't mean this to be a comprehensive list.
>>>>
>>>> 38. You go very quickly into analysis techniques (jet-track
>>>> correlation, etc.) without discussing the data: e.g. how/when the
>>>> data were taken, what the selections are, etc. And it is okay not
>> to
>>>> go too in depth on the STAR subsystems you use, but there should
>>>> then be links to the relevant NIM paper for each subsystem.
>>>>
>>>> 42. "radius"
>>>>
>>>> 57. Should it really be "all tracks in an event" or "each track
>> in
>>>> an event"? (I.e. how many tracks are paired with each jet axis
>> for
>>>> the ME?)
>>>>
>>>> 69. I don't think it will be clear to the reader how the position
>> of
>>>> that circular region is decided. -> "a circular region centered
>> on
>>>> the leading jet axis with a radius..." or similar.
>>>>
>>>> 91. Hmm maybe this is a subtle point, but I would prefer
>> "introduced
>>>> when reconstructing jets" or "which must be considered when
>> studying
>>>> reconstructed jets" or something. "introduced by the jetfinder"
>>>> makes it seem like it's a flaw in anti-kT. Similar comment for l.
>>>> 89.
>>>>
>>>> 94. "two"
>>>>
>>>> 98. It's up to you, but I would recommend something like
>> "p+p\oplus
>>>> Au+Au" rather than the parentheses.
>>>>
>>>> 134. "radius"
>>>>
>>>> 135. I'm not sure what you mean with this sentence. There would
>> also
>>>> be a selection on pseudorapidity, for example. By the way,
>> speaking
>>>> of that I'm not sure if you ever mention that this is at
>>>> midrapidity, right?
>>>>
>>>> 142. In the proceedings from HP'23, it was "the hardness of
>>>> fragmentation within the sample of jets." whereas now it's "...of
>>>> the initial parton scattering within the sample of jets." To me
>> the
>>>> former is more correct and I would prefer if it were changed
>> back.
>>>>
>>>> 174. Math 'R' (also 178).
>>>>
>>>> 177. "show that for anti-kT..."
>>>>
>>>> 180. I think you're using the word "hint" here because you don't
>>>> want to make too strong a conclusion about the actual physics,
>> given
>>>> the extension to be made to e.g. lower pTcons and the caveats
>> e.g.
>>>> the leading jet selection bias. But the data that you have don't
>>>> show a hint, they show definitively that within precision, there
>> is
>>>> no baryon enhancement. So I would reframe slightly to actually
>> make
>>>> the physics connection (from baryon enhancement -> medium
>>>> modification to particle composition; the enhancement being the
>>>> observed figure, the modification to particle composition being
>> the
>>>> physics effect) and flip the logic from ~"evidence of no ___" to
>>>> ~"no evidence of ___": "We see no evidence for medium
>> modification
>>>> to...". Then or before, caveats can be added to that statement as
>>>> necessary.
>>>>
>>>> 186. It's not vital for now, but at some point the references
>> will
>>>> need a lot of work. Please take a look if you have some time.
>>>>
>>>> General:
>>>>
>>>> Some points that weren't discussed which I think could be were:
>>>> the quark vs. gluon aspect. I know you're not including any
>> radius
>>>> dependence, but it may be good to point out that given the
>>>> kinematics at STAR and the pTcons selection, you probably have a
>>>> decently pure quark-jet sample. Also, it would be nice if there
>> were
>>>> a bit of discussion on the reason for the discrepancy between the
>>>> inclusive pp (AA) and in-jet pp (AA). You point to the ALICE
>>>> reference, but I think more could be said here since it's such a
>>>> salient feature of the plot.
>>>> It's also a bit light on physics conclusions/takeaways. In e.g.
>> the
>>>> summary & conclusions, I think it would be good to make one
>> further
>>>> step from what we observe to what it might mean. Of course, it's
>> a
>>>> tightrope walk between not making it clear to the reader what
>>>> physics we're trying to learn from the study and speculating too
>>>> much as an experimentalist. But I thought you did a good job in
>> l.
>>>> 27 in the introduction of laying out the physics motivation. You
>> can
>>>> kind of repeat that here for the people who skip to the
>> conclusions
>>>> first, but saying instead now that we've seen the results "This
>>>> study addresses the open question of..., with some evidence that
>> the
>>>> ... is not modified by..." My comment on l. 180 actually also
>> would
>>>> address this somewhat, now that I think about it.
>>>> Systematics were also never mentioned. You don’t have to get
>> too
>>>> technical if you want to keep it streamlined, but something like
>>>> “Systematics related to X, Y, and Z were considered, with X
>> being
>>>> leading in [insert kinematic range]…”, at minimum, really
>> needs
>>>> to be included.
>>>>
>>>> Analysis note:
>>>>
>>>> The proton m^2 fit in the 3 < pT < 3.5 GeV range doesn't look
>> very
>>>> good, but I guess this is irrelevant because it's still low
>> enough
>>>> pT to be in the bin-counting region, right?
>>>>
>>>> Thanks for including a clear explanation of the 3-track
>>>> consideration for the background studies. I think that will help
>>>> clear up the questions of anyone reading through it who didn't
>> read
>>>> the email chain earlier.
>>>>
>>>> Although for the paper it is a choice to either include or not
>>>> include some technical details, for the analysis note there are
>> some
>>>> things which really need to be included (e.g. run year, dataset,
>>>> centrality definition, bad runs, all event, track, jet
>> selections,
>>>> any relevant QA plots, etc., etc., etc.). I would almost say the
>>>> shorter your paper, the longer your analysis note should be :).
>>>> By the way, speaking of the centrality definition, did you and
>>>> Tanmay manage to get the centrality definition for Run 14 that
>>>> you've been using made an official part of RefMultCorr?
>>>>
>>>>> On May 24, 2024, at 15:04, Gabe Dale-Gau <gdaleg2 AT uic.edu>
>> wrote:
>>>>>
>>>>> Dear HP-Conveners,
>>>>>
>>>>> We would like to request GPC formation for our paper
>>>>> Baryon-to-Meson Ratios in Jets from Au+Au and p+ p collisions at
>>>>> \sqrtS N N = 200 GeV.
>>>>>
>>>>> A first draft of the paper can be found here:
>>>>>
>>
> https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fsystem%2Ffiles%2FPtoPi_InJets.pdf&data=05%7C02%7Cgdaleg2%40groute.uic.edu%7C99ec8d1d999649e7d15208dcaf12a898%7Ce202cd477a564baa99e3e3b71a7c77dd%7C0%7C0%7C638577742495420068%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=BZGfcyZDZ9jYjq6vKqzX9RWvhD5bQ5FDBMtHIzmxDok%3D&reserved=0
>> [1] [1]
>>>>>
>>>>>
>>>>> The paper proposal page with draft analysis note and paper
>> details
>>>>> can be found here:
>>>>>
>>>>
>>>
>>
> https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fblog%2Fgdalegau%2FBaryon-Meson-Ratios-Jets-pp-and-AuAu-Collisions-200-GeV&data=05%7C02%7Cgdaleg2%40groute.uic.edu%7C99ec8d1d999649e7d15208dcaf12a898%7Ce202cd477a564baa99e3e3b71a7c77dd%7C0%7C0%7C638577742498857805%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=3pRC6d7ib7fRqdhwhX0mojHfB62G3KXT9%2BklX6G1IzQ%3D&reserved=0
>> [2]
>>>>> [2]
>>>>>
>>>>> Our target journal is PLB.
>>>>>
>>>>> Please let me know if you have any comments or if there is
>>>>> anything else I can provide to help move this paper forward.
>>>>>
>>>>> Thanks!
>>>>>
>>>>> Gabe
>>>
>>>
>>> Links:
>>> ------
>>> [1]
>>>
>>
>
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>> [3]
>>> [2]
>>>
>>
>
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>> [4]
>
>
> Links:
> ------
> [1]
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> [2]
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> [3]
>
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> [4]
>
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