STAR HardProbes PWG

[Diptanil Roy <roydiptanil AT gmail.com>]

Hi Barbara, please find the closure plots for D0 pT [1-10] GeV in the slides here. https://drupal.star.bnl.gov/STAR/system/files/HardProbes_Aug10_Diptanil_v5.pdf#page=90. Apologies for missing that earlier.

On Mon, Aug 21, 2023 at 6:30 AM Barbara Trzeciak <barbara.trzeciak AT gmail.com> wrote:

Hi Neil,

could you please also add your closure test results.

Cheers,

Barbara

On Mon, Aug 21, 2023 at 3:19 AM Diptanil Roy <roydiptanil AT gmail.com> wrote:

Hi everyone, I have made some updates to the systematics for the ratio plots. I have now made the distinctions clearer between the correlated and the uncorrelated errors for the RCP measurements. The updates can be found here: https://drupal.star.bnl.gov/STAR/system/files/HardProbes_Aug10_Diptanil_v5.pdf#page=51.

Slides 51-67 has all the details for the systematics. Please let me know if you have any questions.

On Sat, Aug 19, 2023 at 8:18 PM Diptanil Roy <roydiptanil AT gmail.com> wrote:

Hi everyone, please find my responses to your questions in this update: https://drupal.star.bnl.gov/STAR/system/files/HardProbes_Aug10_Diptanil_v4.pdf#page=45

The responses are on Slide #45 and beyond.

Please find a few comments below:

1. All comments about the systematics

Ans: I didn't consider all the sources of uncertainty. In this most recent iteration, I have included Tracking Efficiency Unc., D0 Signal Extraction Unc., and D0 Reconstruction Eff. Unc.. I got the ratios for the last one from the D0 RCP 2014 paper. Slides 51-53 show the individual contributions of each of these categories for the jet pT spectra and jet pT RCP. For fragmentation function and radial profile, the plots are in backup.

These errors are mostly correlated. I will include a global TAA uncertainty in the final version of the plots.

2. You have used now DCA < 3 cm, this may include some background tracks. Have you done any test with a strict DCA cut like 1, or 2 cm? Just to know if there is any effect with lesser background? A bit concern for your Delta_R and Z results. Just to make sure there is no such contribution.

Ans: The DCA < 3 cm is a more or less standard cut in jet-studies, so I haven't tinkered with it a lot. This is only true for the jet part though. The D0 reconstruction efficiency includes variation of DCA, and DCA-based cuts on the D0 candidates.

I will check the effect in a small embedding sample to see how much the effect could be.

3. Rongrong's question about wide variation in data-weighted distribution

Ans: There are two major things happening in this. 

a) The prior pT distribution and prior z distribution are simultaneously changing. That's shown in Slide #49. In case of PYTHIA, while the prior pT distribution changes, the prior Z is the same. This seems to have a large effect.

b) The 2D-weights have considerable fluctuations in bins with few entries in data. That's mostly true for peripheral cases.

In slides #46-48, I show what happens if I only try to match the GEANT level distribution with data for one variable i.e Jet pT or Jet Z only. We only capture the full variation when both are changed simultaneously.

4. since you have Lido predictions, can you try to use the Lido spectrum as one of the prior variations and see how large sys. uncertainty it gives you ?

Ans: Unfortunately, I have the LIDO Jet pT and fragmentation function curves separately (1D versions only), instead of 2D versions, so doing this in a way where I can maintain both LIDO pT and Z is not possible.

I will send out a version of the presentation with the request for preliminary very soon.

Thank you again for your comments. I look forward to hearing from you.

On Thu, Aug 17, 2023 at 10:44 AM Diptanil Roy <roydiptanil AT gmail.com> wrote:

Hi everyone, I saw all your emails, and am preparing the answers to the questions with required plots. I will send them as soon as possible. Thank you.

On Thu, Aug 17, 2023 at 3:57 AM Barbara Trzeciak <barbara.trzeciak AT gmail.com> wrote:

Hi Neil,

following up on the systematic uncertainties, that indeed look very small in the ratios.

Could you please make a list of the sys. unc. that you consider and try to assess if they are correlated or not. That would be useful for the discussion at the meeting. 

And since you have Lido predictions, can you try to use the Lido spectrum as one of the prior variations and see how large sys. uncertainty it gives you ?

Cheers,

Barbara

On Thu, Aug 17, 2023 at 8:25 AM Nihar Sahoo <nihar AT rcf.rhic.bnl.gov> wrote:

Hello Diptanil,

Thank you for your updates.
In addition to Rongrong's comment, Please find my additional comments
below.

_Have you done any closure test for Z_jet^D correction procedure?

Slide21:
You have used now DCA < 3 cm, this may include some background tracks.
Have you done any test with a strict DCA cut like 1, or 2 cm? Just to
know if there is any effect with lesser background?
A bit concern for your Delta_R and Z results. Just to make sure there is
no such contribution.

Slide4:
Can you please point to your raw distributions for Z_jet as well? Just
to see how much the correction is?
Take one pT bin (say 1-10 GeV/c) for three centrality , and compare
before and after correction.

Slide30:
1-10 GeV/c pT,D bins; central top plot; why systematic uncertainties are
almost zero for intermediate p_T,jet^D0 bins, for example 8-12 GeV/c?
Same for other plots.

Slide34:
1-10 GeV/c pT,D bin: R_cp central plot: do you understand why 0-0.2 bin
has almost zero sys uncertainty?


Best
Nihar


On 2023-08-16 21:52, Diptanil Roy wrote:
> Hi everyone, I have implemented the changes recommended yesterday in
> the PWG meeting. Please find the updated presentation here.
> https://drupal.star.bnl.gov/STAR/system/files/HardProbes_Aug10_Diptanil_v3.pdf
>
> Here are some comments below:
>
> 1. Slide 11: I added the generated level input plots for PYTHIA+FONLL
> distribution weighed by the data. They are shown in black.
> 2. Slides 27-38: I have added the new plots with the updates. Slide 26
> summarises the updates. I have retained the old plots just in case you
> wanted to compare them. For eg: Slide 27 has the jet pT spectra that I
> showed yesterday. Slide 28 has the jet pT spectra after I moved the
> central value to the mean of the prior variation.
> 3. Slides 39-44: I have the plots compared to available theory
> predictions. I have added the prediction for peripheral events spectra
> in D0 pT 1-10 GeV, and all the spectra in D0 pT 4-10 GeV.
>
> Please let me know if you have any questions/comments.
>
> Cheers,
>
> On Tue, Aug 15, 2023 at 10:35 AM Diptanil Roy
> <roydiptanil AT gmail.com> wrote:
>
>> Hi everyone, please find my contribution from today.
>>
> https://drupal.star.bnl.gov/STAR/system/files/HardProbes_Aug10_Diptanil_v2.pdf
>>
>> Thank you for your comments.
>>
>> Cheers,
>>
>> On Tue, Aug 15, 2023 at 7:50 AM Barbara Trzeciak via Star-hp-l
>> <star-hp-l AT lists.bnl.gov> wrote:
>>
>> Thanks Jakub for the quick update.
>> Unfortunately, I won't be able to connect today for your
>> presentation.
>> Will check the discussion from the recording and let you know in
>> case of further questions.
>>
>> Cheers,
>> Barbara
>>
>> On Tue, Aug 15, 2023 at 1:09 PM Ceska, Jakub via Star-hp-l
>> <star-hp-l AT lists.bnl.gov> wrote:
>>
>> Dear Barbara,
>>
>> thank you for your comments. Please find and updated version of the
>> presentation (same link,
>> https://drupal.star.bnl.gov/STAR/blog/ceskajak/HP-PWG-meeting-150823
>> [1]).
>>
>> The pT bin fits (slides 24-29) are the first approach and can
>> definitely be improved. The 0-2 GeV/c bin would need a different
>> background shape, as the exponential does not work here). The plots
>> show a comparison of fits with Leszek's constraints (left) and with
>> larger, arbitrarily chosen constraints (right). Again, relaxing the
>> constraints improves the accuracy of the signal fit.
>>
>> The constrained values used previously and the current values can
>> be found again on slides 22 and 23. The fit does not seem to succeed
>> for any unbound signal width and tends to grow to unexpectedly large
>> values of sigma. The upper constraint of 0.3 was chosen arbitrarily.
>>
>>
>> Best regards,
>> Jakub
>>
>> -------------------------
>>
>> Od: Barbara Trzeciak <barbara.trzeciak AT gmail.com>
>> Odesláno: úterý 15. srpna 2023 11:04
>> Komu: STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
>> Kopie: Ceska, Jakub <jakub.ceska AT fjfi.cvut.cz>
>> Předmět: Re: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug
>> 2023
>>
>> Hi Jakub,
>>
>> thanks for the update. It looks like the peaks are wider. If it's
>> quick, can you do the same exercise for Upsilon signal divided in
>> Upsilon pT bins ?
>> It would be useful to add comparison of  numerical values between
>> the previous constraint from Leszek fit parameters (mean and width)
>> and the ones that your new fit prefers.
>> And it would be good to see in more detail what happens with the
>> signal's width for J/psi in Brennan's analysis.
>>
>> Cheers,
>> Barbara
>>
>> On Tue, Aug 15, 2023 at 10:44 AM Ceska, Jakub via Star-hp-l
>> <star-hp-l AT lists.bnl.gov> wrote:
>>
>> Dear Barbara,
>>
>> thank you for your comments. I have tried relaxing the widths (and
>> the means) of the CB functions. This appears to cover the signal
>> better. Please see slides 22 and 23 in the attached presentation:
>> https://drupal.star.bnl.gov/STAR/blog/ceskajak/HP-PWG-meeting-150823
>> [1]
>>
>> As for the embedding, I am working on it, but have no results yet.
>>
>> Best regards,
>> Jakub
>>
>> -------------------------
>>
>> Od: Barbara Trzeciak <barbara.trzeciak AT gmail.com>
>> Odesláno: pátek 11. srpna 2023 12:49
>> Komu: STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
>> Kopie: Ceska, Jakub <jakub.ceska AT fjfi.cvut.cz>
>> Předmět: Re: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug
>> 2023
>>
>> Hi Jakub,
>>
>> thanks for the update on the fitting.
>> Looking at your slide 20, it seems that this left tail is part of
>> the signal. Could you please check what happens if you make looser
>> constraints to your Upsilon signal width.
>> Also, have you had a chance to look at the embedding to see if you
>> get such a wide signal there ?
>>
>> Cheers,
>> Barbara
>>
>> On Thu, Aug 10, 2023 at 2:11 PM Ceska, Jakub via Star-hp-l
>> <star-hp-l AT lists.bnl.gov> wrote:
>>
>> Dear all,
>>
>> please find my slides attached:
>> https://drupal.star.bnl.gov/STAR/blog/ceskajak/HP-PWG-meeting-100823
>>
>> Best,
>> Jakub
>>
>> -------------------------
>>
>> Od: Star-hp-l <star-hp-l-bounces AT lists.bnl.gov> za uživatele Ceska,
>> Jakub via Star-hp-l <star-hp-l AT lists.bnl.gov>
>> Odesláno: středa 9. srpna 2023 18:02
>> Komu: STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
>> Kopie: Ceska, Jakub <jakub.ceska AT fjfi.cvut.cz>
>> Předmět: Re: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug
>> 2023
>>
>> Dear all,
>>
>> I will report on the questions raised last week and present an
>> update on the status of the analysis of the Run17 Upsilons.
>>
>> If possible, I would like to present at the beginning of the
>> meeting, as I will need to leave by 12 EDT.
>>
>> Best,
>> Jakub
>>
>> -------------------------
>>
>> From: Star-hp-l <star-hp-l-bounces AT lists.bnl.gov> on behalf of
>> 张炜 via Star-hp-l <star-hp-l AT lists.bnl.gov>
>> Sent: Wednesday, August 9, 2023 3:47:06 PM
>> To: STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
>> Cc: 张炜 <wzhang AT m.scnu.edu.cn>
>> Subject: Re: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug
>> 2023
>>
>> Dear All，
>>
>> I'd like to give an update on AuAu27、19.6、14.6GeV analysis.
>>
>> Best，
>> Wei
>>
>> ------------------ Original ------------------
>>
>> From:  "STAR HardProbes PWG"<star-hp-l AT lists.bnl.gov>;
>> Date:  Wed, Aug 9, 2023 07:53 PM
>> To:  "STAR HardProbes PWG"<star-hp-l AT lists.bnl.gov>;
>> Cc:  "Roy Chowdhury Priyanka
>> (DOKT)"<priyanka.roy_chowdhury.dokt AT pw.edu.pl>;
>> Subject:  Re: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug
>> 2023
>>
>> Hello Nihar and all,
>>
>> I will give an update on track merging issue for D0-hadron
>> femtoscopy. I will upload my slides later.
>>
>> Regards,
>> Priyanka
>>
>> -------------------------
>>
>> From: Star-hp-l <star-hp-l-bounces AT lists.bnl.gov> on behalf of
>> Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov>
>> Sent: Tuesday, August 8, 2023 10:06 AM
>> To: Star-hp L <Star-hp-l AT lists.bnl.gov>
>> Cc: Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>
>> Subject: [Star-hp-l] HP-pwg meeting 10 AM BNL time, 10th Aug 2023
>>
>> Hello All,
>>
>> We will have our HP-pwg meeting this Thursday (10th Aug) at 10 AM
>> EDT.
>> Let us know please if you want to present and discuss your analysis
>> or
>> any other business.
>> Send your presentation slides a few hrs before the meeting, please.
>>
>> As QM2023 deadline is approaching, we request all PAs to update us
>> your
>> status for your presentation/poster.
>>
>> HP working group weekly meeting info:
>>
> https://drupal.star.bnl.gov/STAR/pwg/Hard-Probes/Weekly-HP-PWG-meeting
>>
>> Join ZoomGov Meeting
>>
> https://bnl.zoomgov.com/j/1611419615?pwd=VW1hNm43ZDd5d2EvK2R4aEJsQ2ZNZz09
>> [2]
>>
>> Meeting ID: 161 141 9615
>> Passcode: 744968
>>
>> Regards,
>> Isaac, Yi and Nihar
>> _______________________________________________
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> --
>
> ~ Neil
>
> --
>
> ~ Neil
>
> Links:
> ------
> [1]
> https://drupal.star.bnl.gov/STAR/blog/ceskajak/HP-PWG-meeting-150823
> [2]
> https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1611419615?pwd=VW1hNm43ZDd5d2EvK2R4aEJsQ2ZNZz09__;!!P4SdNyxKAPE!C0kgtN_CyUdDd6WuslA8rEi7DLx1vclviJfToU_3a7peinSeePdJXpWZfWhg0YcbLANrvol1vGZ0UYrj4wv7tKrjRaP05bd6NUKv$

--

~ Neil

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~ Neil

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~ Neil

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~ Neil