STAR HardProbes PWG

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

Hello Tristan,

It looks good. I don't have further comments, we can discuss after HQ 
conference.
For a record, I sign off your preliminary plots and your HQ 
presentation.

Enjoy the conference!

Cheers
Nihar



On 2022-10-11 00:28, Tristan Protzman wrote:
> Hi All,
>
> The jobs analyzing the data and throwing out 4% of tracks have
> completed, the results have been attached.  The new points fall within
> uncertainties, demonstrating that statistical fluctuations are
> dominant.  I have updated the preliminary figure request as well.
>
> Preliminary Figure Request: Azimuthal Anisotropy of Jets in √(s_NN
> )=200 GeV Ru+Ru and Zr+Zr Collisions (bnl.gov) [5]
>
> Cheers,
> Tristan
>
> On Wed, Oct 5, 2022 at 10:04 AM Tristan Protzman <tlp220 AT lehigh.edu>
> wrote:
>
> > Slide11:
> > _For hard core jets, do you perform jet-by-jet rho times jet area
> > subtraction?
> >
> > No, the assumption is the high pT tracks of hard cores are most
> > likely from a hard scattering, and as such there is not a background
> > component to remove.
> >
> > _For hard core jet selection, have you checked with pT>1.5 GeV/c and
> > 2.5
> > GeV/c? Do you have such plots for comparison like your right side
> > plot?
> >
> > It's not exactly what you're asking for, but in my update to Hard
> > Probes on 8/18 [1], (slide 6) I showed the effect of 1, 2, and 3
> > GeV/c constituent cuts on 30-50% central with a subset of the
> > available data.  All three cuts were within the uncertainty of each
> > other.  I am currently running over the full data and will have the
> > information I need to repeat this plot with the current kinematic
> > cuts.
> >
> > Slide16:
> > _Do you understand why your last bin is going down to negative for
> > hardcore only jet?
> > I would expect at high pT all these jets give the same v2 (or
> > matched
> > jet and hardcore jets would be the same).
> > Is this just statistical fluctuations?
> >
> > Yes, I believe this is getting into the area of statistical
> > fluctuations.
> >
> > _Can you please show Delta phi distributions (like slide#13) of that
> > pT
> > bin (where v2 is negative) for all three types of jets?
> >
> > Certainly, see the updated slides here (slides 19 - 20): Preliminary
> > Figure Request: Azimuthal Anisotropy of Jets in √(s_NN )=200 GeV
> > Ru+Ru and Zr+Zr Collisions (bnl.gov) [2]
> >
> > Slide#17:
> > _ I like this plot to be "STAR Preliminary" with 5-40GeV/c pT range
> > instead of your slide14; but you can keep this slide#14's plot as a
> > backup.
> > _ I would suggest the following cosmetic changes.
> > 1. Make STAR data points anything filled with red markers.
> > 2. Make ALICE markers with a lighter tone of green/gray color(make
> > it a
> > bit transparent or all color gray such that it would not dominate
> > over
> > StAR data point by look). In this current format, ALICE data points
> > are
> > dominating to the eye.
> >
> > I agree, these changes make the STAR points appear as the more
> > important point.  See the updated slides.
> >
> > On Wed, Oct 5, 2022 at 9:17 AM Tristan Protzman <tlp220 AT lehigh.edu>
> > wrote:
> >
> > Hi Nihar,
> >
> > Thank you for the comments.  I submitted a draft of my HQ talk last
> > week, and updated it last night.  If you are unable to see that
> > please let me know and I will resubmit it now.
> >
> > I will follow up shortly with my responses to your questions.
> >
> > Cheers,
> > Tristan
> >
> > On Wed, Oct 5, 2022 at 9:10 AM Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>
> > wrote:
> > Hello Tristan,
> >
> > As we don't have sufficient time for checks and discussion on your
> > new
> > jet v2 result which is an interesting result from STAR, I suggest
> > please
> > work on your systematic uncertainties which have significant
> > contributions. And please crosscheck from your end these results.
> > I understand that some of our yesterday's suggested todo list needs
> > some
> > time to work.
> >
> > Please send your preliminary draft of your HQ2022 presentation soon.
> >
> > Besides, I have the following questions and suggestions on your
> > preliminary request slides.
> >
> > Slide11:
> > _For hard core jets, do you perform jet-by-jet rho times jet area
> > subtraction?
>
> > > _For hard core jet selection, have you checked with pT>1.5 GeV/c
> > > and 2.5
> > > GeV/c? Do you have such plots for comparison like your right side
> > > plot?
> > >
> > > Slide16:
> > > _Do you understand why your last bin is going down to negative for
> > >
> > > hardcore only jet?
> > > I would expect at high pT all these jets give the same v2 (or
> > > matched
> > > jet and hardcore jets would be the same).
> > > Is this just statistical fluctuations?
> > >
> > > _Can you please show Delta phi distributions (like slide#13) of
> > > that pT
> > > bin (where v2 is negative) for all three types of jets?
> > >
> > > Slide#17:
> > > _ I like this plot to be "STAR Preliminary" with 5-40GeV/c pT
> > > range
> > > instead of your slide14; but you can keep this slide#14's plot as
> > > a
> > > backup.
> > > _ I would suggest the following cosmetic changes.
> > > 1. Make STAR data points anything filled with red markers.
> > > 2. Make ALICE markers with a lighter tone of green/gray color(make
> > > it a
> > > bit transparent or all color gray such that it would not dominate
> > > over
> > > StAR data point by look). In this current format, ALICE data
> > > points are
> > > dominating to the eye.
> > >
> > > Thank you
> > > Nihar
> > >
> > > On 2022-10-05 11:20, Tristan Protzman wrote:
> > > > Hi All,
> > > >
> > > > Thank you for the comments on my preliminary figure request.  I
> > > have
> > > > made the requested changes to the plotting, reflected here:
> > > > Preliminary Figure Request: Azimuthal Anisotropy of Jets in
> > > √(s_NN
> > > > )=200 GeV Ru+Ru and Zr+Zr Collisions (bnl.gov [3]) [2]
> > > >
> > > > To evaluate the magnitude of systematic errors, I plan to look
> > > at the
> > > > following:
> > > > * Tracking efficiency - how does my result change if I throw out
> > > 4% of
> > > > tracks?  This will take a few days as I need to run over the
> > > data
> > > > again
> > > > * Effects of modulated background - How does the result change
> > > if I
> > > > change or even remove the background modulation from the assumed
> > > 4%.
> > > > This should be faster, I should be able to report on this
> > > tomorrow.
> > > > I have also included the measured jet v2 for the population of
> > > all
> > > > jets, hard cores only, and matched jets in a backup slide.  In
> > > general
> > > > there is good agreement between the three.
> > > >
> > > > Cheers,
> > > > Tristan
> > > >
> > > > On Tue, Oct 4, 2022 at 9:57 AM Tristan Protzman
> > > <tlp220 AT lehigh.edu>
> > > > wrote:
> > > >
> > > > > Hi All,
> > > > >
> > > > > Here are my slides for my preliminary figure request.
> https://drupal.star.bnl.gov/STAR/system/files/userfiles/6581/Protzman_JetV2_%20Preliminary_Figure_Request.pdf
> > > > > See you all shortly,
> > > > >
> > > > > Tristan
> > > > >
> > > > > On Sun, Oct 2, 2022 at 10:34 AM Nihar Sahoo via Star-hp-l
> > > > > <star-hp-l AT lists.bnl.gov> wrote:
> > > > >
> > > > > > Hello HP folks,
> > > > > >
> > > > > > We will have a separate HP-pwg meeting this week on our
> > > reserved
> > > > > > day
> > > > > > (Tuesday) 4th Oct at 10 AM BNL time.
> > > > > > Tristan Protzman requested to meet before Thursday (our usual
> > > PWG
> > > > > > meeting time) because he wants to update his jet v2 results
> > > for
> > > > > > HQ2022
> > > > > > STAR preliminary. Hence due to his time constraint and to make
> > > > > > Tristan
> > > > > > happy, We plan to meet this Tuesday also this week.
> > > > > > If anybody wants to discuss anything (which must be urgent)
> > > then
> > > > > > we can
> > > > > > allocate this Tuesday too; otherwise, we can meet Thursday
> > > (with a
> > > > > > separate meeting announcement).
> > > > > >
> > > > > > HP-pwg weekly meeting Drupal page:
> https://drupal.star.bnl.gov/STAR/pwg/Hard-Probes/Weekly-HP-PWG-meeting
> > > > > > Zoom Meeting link:
> https://bnl.zoomgov.com/j/1611419615?pwd=VW1hNm43ZDd5d2EvK2R4aEJsQ2ZNZz09
> > > [4]
> > > > > > [1]
> > > > > >
> > > > > > Meeting ID: 161 141 9615
> > > > > > Passcode: 744968
> > > > > >
> > > > > > Thank you
> > > > > > Barbara, Yi, Sooraj, Nihar
> > > > > > _______________________________________________
> > > > > > Star-hp-l mailing list
> > > > > > Star-hp-l AT lists.bnl.gov
> > > > > > https://lists.bnl.gov/mailman/listinfo/star-hp-l
> > > >
> > > >
> > > > Links:
> > > > ------
> > > > [1]
> https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1611419615?pwd=VW1hNm43ZDd5d2EvK2R4aEJsQ2ZNZz09__;!!P4SdNyxKAPE!AulmhgAy5Xz0XqpGUuYK1djv2jG5SWTEB1IumpHdbTS752yQ4P2x9cKCX0-KM_UEwy9EJvWg-mh1SK42YJCZYcs$
> > > > [2]
> https://drupal.star.bnl.gov/STAR/system/files/Protzman_JetV2_%20Preliminary_Figure_Request_v2.pdf
>
>
> Links:
> ------
> [1] 
> https://drupal.star.bnl.gov/STAR/system/files/Protzman_8_18_hardprobes_jetv2_update.pdf
> [2] 
> https://drupal.star.bnl.gov/STAR/system/files/Protzman_JetV2_%20Preliminary_Figure_Request_v3.pdf
> [3] http://bnl.gov
> [4] 
> https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1611419615?pwd=VW1hNm43ZDd5d2EvK2R4aEJsQ2ZNZz09__;!!P4SdNyxKAPE!EH10hjNQ4U06lBcpxjGp4kPVZAzMBSL9yY4RMuNbQRHz9ghNRCVsxJmVrA10tb8YF_mBK9dX1f0zx1qa65QJZq8$
> [5] 
> https://drupal.star.bnl.gov/STAR/system/files/Protzman_JetV2_%20Preliminary_Figure_Request_v6_0.pdf

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