STAR HardProbes PWG

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

Hello Tamis,

Thank you for addressing my comments.
I have a few additional comments after going through your motivation and 
Pythia study again.

SLide3 (also 4-7): Although you have shown what is "Delta R" in the 
cartoon, but can you please define or mention what is "Delta R"?
As you mention the relation with formation time, a clear definition is 
missing.

Slide7: Can you mention what is "R_L" in x-axis? Is that as 
"ln(Delta_R)"?

Slide8: How do you distinguish (or set the ranges along x-axis) 
green-free hadron, gray-transition, and blue-parton region in PYTHIA6? I 
don't know how it has been done in theory (right side plot)? A guidance 
will be helpful. It brings a question for SLide10.

Slide10: can you set those gree/gray/blue regions for different jet pT 
to see how much those regions shift as a function of jet pT? Visually, 
there is a change in shape. But can we say something which region is 
shifting to where and how much that shift is (in Pythia)?


Cheers
Nihar


On 2022-10-20 11:55, Andrew Tamis via Star-hp-l wrote:
> Hi All,
>
> Thank you for the comments!
>
> I have decided to remove the detector level data, leaving the
> comparison between PYTHIA and Geant.  Showing that these agree
> relatively well will give justification that the needed unfolding
> effects will be small, and because of this data won't be shown until
> unfolding is completed.
>
> In addition I have addressed comments given here
>
> Nihar's Comments
>
> "_Before SLide14, you could introduce STAR detector system and what
> are
> the detectors you plan to use for your measurement? A short intro is
> sufficient."
>
> I will verbally introduce STAR and the TPC, but as i am now no longer
> showing data, is introduction of the specific detectors still needed?
> please let me know.
>
> Slide 14 and 15 have been removed/changed
>
> Slide16:
> _Interesting behavior in response to pT cuts -> PYTHIA6 simulation:
> EEC
> shows a dependence on jet p_{T}
> _Robust to pT-independent tracking efficiency effects -> should we say
> this a "robust" or "mild" "negligible" pT-dependent ?
>     We have not checked yet with pT-dependent tracking efficiency.
> (Slide13)
> _ last two bullets "Detector-Level measurement done in STAR p+p run 12
>
> and Unfolding in progress " I would just say combining "First
> measurement of ECC in pp sqrt(s)=200 GeV is in progress in STAR"
>
> Done.
>
> Barbara's comments
>
> _- s5,6: increase text size of the bullet points._
> _- s8-9: label the left plots Pythia and add the version. I would also
> suggest adding on the top of the plots a bigger label with the jet pT
> information. Right now it's hidden in the "Parameters", so it might
> not be so obvious to everyone that moving to STAR energy means
> lowering the jet pT range. _
>
> Done.
>
> I have uploaded the updated draft, please let me know if you have any
> additional comments
>
> Best,
> Andrew
>
> On Wed, Oct 19, 2022 at 1:09 AM Sooraj Radhakrishnan via Star-hp-l
> <star-hp-l AT lists.bnl.gov> wrote:
>
> > Hi Barbara, Andrew,
> > //s15: to address Sooraj's concerns, which I also share, I would
> > propose to remove "PYTHIA 6" and "GEANT" points and leave the raw
> > detector level data distributions. What do you think?//
> >
> > Yes, this would also be an option. It is up to Andrew to decide
> > which progress and message he wants to show
> >
> > thanks
> > Sooraj
> >
> > On Tue, Oct 18, 2022 at 11:40 PM Barbara Trzeciak
> > <barbara.trzeciak AT gmail.com> wrote:
> >
> > Hi Andrew,
> >
> > nice slides, please see my comments below.
> >
> > - s5,6: increase text size of the bullet points.
> > - s8-9: label the left plots Pythia and add the version. I would
> > also suggest adding on the top of the plots a bigger label with the
> > jet pT information. Right now it's hidden in the "Parameters", so it
> > might not be so obvious to everyone that moving to STAR energy means
> > lowering the jet pT range.
> > - s14: pp Run12 -> add energy and centrality
> > - s15: to address Sooraj's concerns, which I also share, I would
> > propose to remove "PYTHIA 6" and "GEANT" points and leave the raw
> > detector level data distributions. What do you think?
> > Sooraj, would that work for you ?
> >
> > Cheers,
> > Barbara
> >
> > On Tue, Oct 18, 2022 at 12:36 PM Sooraj Radhakrishnan via Star-hp-l
> > <star-hp-l AT lists.bnl.gov> wrote:
> >
> > Hi Andrew,
> > Are you referring to the plots of S9/10 as performance plots?
> > From your S15, comparing PYTHIA and GEANT, the detector effects seem
> > to be small. So I have a concern that we will be in effect showing
> > the data as preliminary results. I believe you are not ready to
> > release the results without the systematics and unfolding done. So I
> > would suggest not to show data points for the energy correlator,
> > rather some other performance plots that would indicate your
> > progress and STAR's ability to do the measurements. Let me know what
> > you think
> >
> > thanks
> > Sooraj
> >
> > On Tue, Oct 18, 2022 at 12:29 PM Nihar Sahoo
> > <nihar AT rcf.rhic.bnl.gov> wrote:
> > Hello Tamis,
> >
> > It is a good study on this new observable.
> > AFA Pythia study is concern, I don't have any comments.
> > I have some minor comments on your data analysis slides.
> >
> > _ Before SLide14, you could introduce STAR detector system and what
> > are
> > the detectors you plan to use for your measurement? A short intro is
> >
> > sufficient.
> >
> > Slide14:
> > _ pp Run12 -> pp sqrt(s)=200 GeV (year 2012)
> > _Trigger - JP2 -> As no one know what is JP2, so it would be good to
> >
> > mention "Jet patch trigger" (here 2 is not necessary for outside
> > world
> > as you describe details about this trigger in sub-bullet)
> > _ Constituent PT ->  Constituent Transverse momentum, p_{T}
> > _Official Embedding, PYTHIA 6  -> PYTHIA6+STAR Géant simulation
> >
> > Slide15:
> > _ Please include "pp sqrt(s) =200 GeV" as legend
> > _ Detector level data retains trends in jet momentum selection ->
> > Detector level data retains trends in jet p_{T} selection
> >
> > Slide16:
> > _Interesting behavior in response to pT cuts -> PYTHIA6 simulation:
> > EEC
> > shows a dependence on jet p_{T}
> > _Robust to pT-independent tracking efficiency effects -> should we
> > say
> > this a "robust" or "mild" "negligible" pT-dependent ?
> > We have not checked yet with pT-dependent tracking efficiency.
> > (Slide13)
> > _ last two bullets "Detector-Level measurement done in STAR p+p run
> > 12
> > and Unfolding in progress " I would just say combining "First
> > measurement of ECC in pp sqrt(s)=200 GeV is in progress in STAR"
> >
> > Cheers
> > Nihar
> >
> > On 2022-10-17 23:00, Andrew Tamis via Star-hp-l wrote:
> > > Hi Sooraj,
> > >
> > > I think I would like to show the PYTHIA results and performance
> > plots
> > > and hold off on a preliminary request until I get farther along
> > with
> > > unfolding.  Do you mean that I should show the performance plots
> > of
> > > detector level data without the comparison to PYTHIA/Geant?
> > >
> > > Best,
> > > Andrew
> > >
> > > On Mon, Oct 17, 2022 at 8:59 AM Sooraj Radhakrishnan via Star-hp-l
> > > <star-hp-l AT lists.bnl.gov> wrote:
> > >
> > > > Hi Andrew,
> > > > Thanks for preparing these nice slides. Since you show detector
> > > > level and generator level PYTHIA distribution are quite similar,
> > I
> > > > wonder if the results should be labelled STAR Preliminary, as
> > they
> > > > can be argued to be close to the physics results. Do you want to
> > > > show the data also at DNP or just the PYTHIA results and give
> > some
> > > > performance plots for data?
> > > >
> > > > thanks
> > > > Sooraj
> > > >
> > > > On Mon, Oct 17, 2022 at 6:27 AM webmaster--- via Star-hp-l
> > > > <star-hp-l AT lists.bnl.gov> wrote:
> > > >
> > > > > Dear Star-hp-l AT lists.bnl.gov members,
> > > > >
> > > > > Andrew Tamis (andrew.tamis AT yale.edu) has submitted a material
> > for
> > > > > a review,
> > > > > please have a look:
> > > > > https://drupal.star.bnl.gov/STAR/node/61351
> > > > >
> > > > > Deadline: 2022-10-27
> > > > > ---
> > > > > 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
> > > >
> > > > --
> > > >
> > > > Sooraj Radhakrishnan
> > > >
> > > > Research Scientist,
> > > > Department of Physics
> > > >
> > > > Kent State University
> > > > Kent, OH 44243
> > > >
> > > > Physicist Postdoctoral AffiliateNuclear Science Division
> > > > Lawrence Berkeley National Lab
> > > > MS70R0319, One Cyclotron Road
> > > > Berkeley, CA 94720
> > > > Ph: 510-495-2473 [1]
> > > >
> > > > Email: skradhakrishnan AT lbl.gov
> > > > _______________________________________________
> > > > Star-hp-l mailing list
> > > > Star-hp-l AT lists.bnl.gov
> > > > https://lists.bnl.gov/mailman/listinfo/star-hp-l
> > >
> > >
> > > Links:
> > > ------
> > > [1] tel:%28510%29%20495-2473
> > > _______________________________________________
> > > Star-hp-l mailing list
> > > Star-hp-l AT lists.bnl.gov
> > > https://lists.bnl.gov/mailman/listinfo/star-hp-l
> >
> > --
> >
> > Sooraj Radhakrishnan
> >
> > Research Scientist,
> > Department of Physics
> >
> > Kent State University
> > Kent, OH 44243
> >
> > Physicist Postdoctoral AffiliateNuclear Science Division
> > Lawrence Berkeley National Lab
> > MS70R0319, One Cyclotron Road
> > Berkeley, CA 94720
> > Ph: 510-495-2473 [1]
> >
> > Email: skradhakrishnan AT lbl.gov
> > _______________________________________________
> > Star-hp-l mailing list
> > Star-hp-l AT lists.bnl.gov
> > https://lists.bnl.gov/mailman/listinfo/star-hp-l
>
> --
>
> Sooraj Radhakrishnan
>
> Research Scientist,
> Department of Physics
>
> Kent State University
>  Kent, OH 44243
>
> Physicist Postdoctoral AffiliateNuclear Science Division
> Lawrence Berkeley National Lab
> MS70R0319, One Cyclotron Road
> Berkeley, CA 94720
> Ph: 510-495-2473 [1]
>
> Email: skradhakrishnan AT lbl.gov
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>
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