STAR HardProbes PWG

[Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>]

Hello Youqi,

Here are my comments on this nice measurement and paper draft. I hope 
detailed discussion will be at the GPC level.
With these comments addressed, I sign off.


L7: "	…while maintaining most of the low-momentum …" -> It is not clear, 
please rephrase this.
L12: "…the formation time …" -> when we mention "formation time of 
splitting" it would be better to make it clear what splitting ? Is it 
hadronic or parsonic level? [Need such discussion in Intro too]
L13:"…non-perturbative effects …" -> Need to elaborate like 
"non-perturbative QCD effects …" [need to introduce QCD in the abstract 
otherwise it is not clear "perturbative" and "non-perturbative" of 
what?]
L19: in coming quarks and gluons (partons)  -> in coming partons
L21 "… a high-momentum virtual particle" and again L23 "highly virtual"; 
you can merge these two sentences.
L24: "a series of splitting processes" -> for general reader you need to 
explain what is that "splitting process"? Like "vacuum gluon radiation"
L38: "…the non-perturbative components of the parton shower …" > Could 
you explain what is the non-perturbative components of the parton shower 
?
L52: "To enhance perturbative contributions …" -> Is this the correct 
way to phrase?  Using SoftDrop grooming we try to study pQCD 
contribution to jet. So if you agree, please rephrase.

_To explain soft drop grooming, you may consider to include one cartoon. 
Just a suggestion.

L69: The z and R…
         "the momentum imbalance" -> is this correct for "z"? Is not 
that "momentum fraction"?
L98-100: Provide reference.

L154-155: We apply the selections of pT > 15 GeV/c, |η| < 0.6,.. -> here 
you need to mention these are jet pT and eta; better to use notation 
like p_T,jet, eta_jet

L161-167: This discussion on SD1 and SD2 cuts can be moved to, after 
L112, where you discuss "a" and and also M_(g). Otherwise, there is a 
confusion while reading that para why we use "M-M_g" (even reader like 
me also).

Eq(5). You have not introduced pT,jet
L279-280: x% and y%; when do you think to include? Same for L318, L319, 
L333
L324: …for a jet of 20 GeV -> 20 GeV/c


FIg.1, Y-axis title ?  pT unit "GeV/c"

L344: …indicating that the CollinearDrop groomed mass is sensitive to 
hadronization effects. -> Why for 30-50 GeV/c case, both SCET and MC 
simulations are the same unlike 20-30 GeV/c? Do you understand this? Is 
that statement  true for 30-50 GeV/c?

L358: formation time t, -> Formation time of what?
Fig.3: resolution of this plot should be enhanced.  Currently insert one 
is not good.


Best
Nihar

On 2024-03-12 03:36, Youqi Song via Star-hp-l wrote:
> Hi all,
>
> Please find my paper draft and analysis note here and let me know if
> you have any comments or suggestions! I plan to request for GPC
> formation during the collaboration meeting. Here is the drupal page:
>
> https://drupal.star.bnl.gov/STAR/blog/youqi/Measurement-collinear-drop-jet-mass-and-its-correlation-groomed-jet-substructure-observab.
>
> Best,
> Youqi
> _______________________________________________
> Star-hp-l mailing list
> Star-hp-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/star-hp-l