STAR HardProbes PWG

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

Hi Youqi,

Please find my further comments inline.

On 2023-03-24 20:11, Youqi Song wrote:
> Hi all,
>
> I have updated my slides here:
> https://drupal.star.bnl.gov/STAR/system/files/dis_032823_v4.pdf.
>
> Addressing Nihar's comments:
>
> > Slide4:
> > You don't describe what is (z_cut,2 , beta_2). Please mention what
> > is
> > that.
> > if you don't use, mention it.
>
> It's a good point that I should make both sets of (z_cut, beta) values
> clear. I've updated my figures in the later slides to include
> (z_cut,1, beta_1) = (0,0) and (z_cut,2, beta_2) = (0.1,0). I will
> upload these figures to drupal shortly. But as for slide 4, I am
> inclined to not put in (z_cut,2, beta_2) = (0.1, 0) here, since this
> bullet point here says "special case". What's "special" about this
> case is that (z_cut1, beta_1) = (0,0), which I have written on the
> slide, but the exact values of (z_cut,2, beta_2) don't make it
> "special".

Sorry, I don't get my answer.
Have you used (z_cut,2 , beta_2) in your analysis or not?
If you have used it, just mention it in this slide.
If not, don't mention it.

> > SLide:6
> > "Note: Hadronization effects smear the distribution but don’t
> > affect the
> > correlations (see backup)"
> >
> > Please either put some plots here to show what you claim or remove
> > it
> > and in case someone asks you go to your backup slide.
> > In your talk while presenting, no one will go to see your backup.
>
> I have discussed this with Helen, and we think it will be useful to
> have a note somewhere in the main slides to acknowledge that we have
> studied the effect of hadronization. Since the talk is already on the
> long side, I think it might be better to keep the plots in the backup.
> In case someone asks me to go to backup slides during Q&A or coffee
> breaks, I would happily do so.
>
> > "consistent with angular ordered parton shower picture"
> > Do you mean all subsequent emissions from hard parton in vacuum as a
> > function of formation time?
>
> I have now moved this statement up to combine with the first bullet
> point, since we have agreed in the "Re: Text for Youqi's slide for HP
> Plenary" email thread that in the HP highlight talk that the physics
> message is "Anti-correlation of collinear dropped jet mass and Rg
> confirms angular ordering in vacuum showers”

I don't get my answer here.

So I would not say "confirms".
Because it is not clear what "angular ordering" we are saying here?


Thank you
Nihar

> Best,
> Youqi
>
> On Fri, Mar 24, 2023 at 9:08 AM Yi Yang <yiyang AT ncku.edu.tw> wrote:
>
> > Hi Helen,
> >
> > Thanks a lot for the explanation.
> > I completely confused myself... it is completely fine to me if
> > HERWIG is running at 200 GeV.
> >
> > Chees,
> > Yi
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Professor
> > Department of Physics /
> > Director of Science Education Center
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web: http://phys.ncku.edu.tw/~yiyang [1]
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> > On Thu, Mar 23, 2023 at 5:58 PM Helen Caines
> > <helen.caines AT yale.edu> wrote:
> >
> > Hi Yi, Barbara,
> >
> > Youqi can correct me if I am wrong, but the HERWIG simulation is
> > run at 200 GeV is it just that the tune was done to LHC data.
> >
> > So the physics evolution with sqrt(s) should be there and the
> > comparison valid. Also, since this is a substructure variable if
> > they have the quark/gluon fraction changing appropriately with
> > sqrt(s) the agreement should be good if they are modeling this well
> > at LHC energies. Once the hard scatter has occurred, and assuming
> > the UE isn’t contaminating the results horribly, how the parton
> > splits and then hadronizes should be independent of the original
> > sqrt(s) of the collision for a fixed jet pT and parton species.
> >
> > Helen
> >
> > ***********************
> > Yale University
> > Physics Dept. - Wright Lab.
> > PO Box 208120
> > New Haven, CT 06520
> > 203-432-5831
> > ***********************
> > she/her/hers
> > "Life is not about waiting for the storms to pass.
> > It's about learning how to dance in the rain." - Vivian Greene
> >
> > On Mar 23, 2023, at 4:16 PM, Youqi Song via Star-hp-l
> > <star-hp-l AT lists.bnl.gov> wrote:
> >
> > Hi all,
> >
> > Thanks for the additional feedback! I have implemented all the
> > suggestions and  uploaded my slides here:
> https://drupal.star.bnl.gov/STAR/system/files/dis_032823_v3_print.pdf.
> > Regarding the HERWIG comparisons, I think we are only making a weak
> > statement by claiming that "they are roughly consistent with the
> > trend of data", so we aren't drawing too much physics out of the
> > comparisons. But I will discuss that more with Helen and Raghav on
> > that and update you about it.
> >
> > Please let me know if you have any additional comments and
> > questions!
> >
> > Best,
> > Youqi
> >
> > On Thu, Mar 23, 2023 at 5:44 AM Yi Yang <yiyang AT ncku.edu.tw>
> > wrote:
> >
> > Hi Youqi,
> >
> > Thanks a lot for the updated version and reply. I don't have any
> > further comments on your nice slides.
> > Just want to follow up the HERWIG7, I understand it has different
> > hadronization and it is (probably) okay to compare it with. But can
> > you really draw a conclusion from this comparison? I mean, can you
> > tell the difference is due to different collision energy or
> > hadronization process? If not, I am not sure how helpful this
> > comparison can be. Just my two cents.
> >
> > Cheers,
> > Yi
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Professor
> > Department of Physics /
> > Director of Science Education Center
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web: http://phys.ncku.edu.tw/~yiyang [2]
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> > On Wed, Mar 22, 2023 at 9:59 PM Youqi Song <youqi.song AT yale.edu>
> > wrote:
> >
> > Hi Barbara, Nihar and Yi,
> >
> > Thanks for the feedback! I have updated my slides here:
> > https://drupal.star.bnl.gov/STAR/system/files/dis_032823_v3.pdf
> >
> > Regarding Barbara's comments:
> >
> > Just a comment on s16. It's hard to quickly judge by eye which
> > distribution is more steep so it might not be obvious to people. But
> > you don't need the right plot to make this point. The first split
> > should be basically the sum of the contributions that you show on
> > your plot. So naturally it should be less steep than the blue, if
> > green and yellow are flatter. With the z_g in R_g bins we show that
> > we saw the np contributions to the first split and have a consistent
> > picture - as you write in your backup. Which I think is a nice
> > physics message.
> > I see, that's a good point. I switched the zg vs Rg plot into the
> > main section and zg vs # splitting to backup.
> >
> > Regarding Nihar's comments:
> >
> > I have fixed the wording and updated my figures here:
> https://drupal.star.bnl.gov/STAR/blog/youqi/Multidimensional-jet-substructure-multifold-preliminary-figures.
> > Regarding Yi's comments:
> >
> > - p2: your right-handed cartoon plot covers the text a bit.
> > - p3: the resolution at the left-bottom area (z_g, z_cut, and beta)
> > is not good? And similar for dM/M and M on p4.
> > I fixed these in the new version.
> > - p6: What does "~" mean here? I saw 3 places.
> > I use "~" to indicate something like "roughly implies/looks like".
> > We wanted to be careful here because hadronization effects can
> > affect our measurements. I added a note about that on this slide.
> >
> > - p12: Could you please remind me of the motivation for comparing
> > HERWIG with LHC tune? Do we expect the tune works for RHIC?
> > We don't have a HERWIG tune at RHIC energy, and this LHC tune that
> > we used is the default tune in HERWIG7. I think it's still useful to
> > compare since it does hadronization differently from PYTHIA.
> >
> > - p14: the "boxes (yellow, green, and black)" cover the information
> > on the plot, could you please try a thinner line for them?
> > I have my slides in animation, so when the left side 2D plot first
> > shows up, those boxes are not there. I will keep them for my
> > presentation, but perhaps when I upload the slides to the indico
> > page I can remove those boxes.
> >
> > Best,
> > Youqi
> >
> > On Wed, Mar 22, 2023 at 8:36 AM Yi Yang via Star-hp-l
> > <star-hp-l AT lists.bnl.gov> wrote:
> >
> > Hi Youqi,
> >
> > Thanks a lot for the nice slides. I only have some minor comments
> > for your consideration.
> > - p2: your right-handed cartoon plot covers the text a bit.
> > - p3: the resolution at the left-bottom area (z_g, z_cut, and beta)
> > is not good? And similar for dM/M and M on p4.
> > - p6: What does "~" mean here? I saw 3 places.
> > - p12: Could you please remind me of the motivation for comparing
> > HERWIG with LHC tune? Do we expect the tune works for RHIC?
> > - p14: the "boxes (yellow, green, and black)" cover the information
> > on the plot, could you please try a thinner line for them?
> > - p15: I am not sure if it is good to say "See Monika's talk at
> > HP", probably is okay...
> >
> > Cheers,
> > Yi
> >
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> > Yi Yang, Professor
> > Department of Physics /
> > Director of Science Education Center
> > National Cheng Kung University
> > Tainan, 701 Taiwan
> > E-Mail: yiyang AT ncku.edu.tw
> > Tel: +886-6-2757575 ext.65237
> > Fax: +886-6-2747995
> > Group Web: http://phys.ncku.edu.tw/~yiyang [3]
> > +++++++++++++++++++++++++++++++++++++++++++++++++++
> >
> > On Tue, Mar 14, 2023 at 10:14 AM webmaster--- via Star-hp-l
> > <star-hp-l AT lists.bnl.gov> wrote:
> > Dear Star-hp-l AT lists.bnl.gov members,
> >
> > Youqi Song (youqi.song AT yale.edu) has submitted a material for a
> > review,
> > please have a look:
> > https://drupal.star.bnl.gov/STAR/node/62961
> >
> > Deadline: 2023-03-27
> > ---
> > If you have any problems with the review process, please contact
> > webmaster AT www.star.bnl.gov
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