STAR HardProbes PWG

[Yi Yang <yiyang0429 AT gmail.com>]

Dear Derek,

Thanks a lot for the explanation and updated version.

I don't have any further comments on your nice slides.

Cheers,

Yi

On Sat, Jul 2, 2022 at 3:25 AM Derek Anderson <derekwigwam9 AT tamu.edu> wrote:

Hi Yi,

No worries! And thanks for the feedback! You can find my responses and the version of my slides with your suggestions implemented below.

> p7, about the TPS definition, what does r^1.5 mean? Why not r^2? How do you know the yellow regions in the plots are 95% pure pi0 and the green regions correspond to photons?

The funny exponent in the denominator was tuned in simulation studies to maximize the separation in TSP between broad EM showers in the BEMC (like pi0 to 2 photon decays) and narrow EM showers (like single photons): thus low TSP values correspond to broader, pi0-like showers and higher TSP values correspond to narrower, single photon-like showers. The particular TSP ranges we use to select pi0 and gamma-rich triggers (which aren't just direct photons, but also hadronic decays and fragmentation photons) were also tuned and validated in simulations. (Likewise, the purity on the pi0s was assessed using simulations.) You can find some more info in the previous STAR publications making use of the TSP:

https://journals.aps.org/prc/pdf/10.1103/PhysRevC.82.034909?casa_token=OgwexALAPToAAAAA%3AWBo9yT6wvEUOZ86exd9xNZZWC_-5x-fFrBghOcp13vKW0sW6Zk3RznwLVqYWeaP30wS5PuGEYBWpOw

https://www.sciencedirect.com/science/article/pii/S0370269316303872

> p12: Why didn't you use the STAR tune? (I believe it has been discussed, so just for my own education

Really just because the default tune is what we had on hand. We're working right now on preparing the corresponding curves using the STAR-tune of PYTHIA-6, but those need some more time...

> p17: What does "p+p style different" mean?

The systematic uncertainty bands here are represented as hatched bands rather than as solid bands, as they had been on previous slides. I added some text to clarify that the style is different from previous slides!

> p18: Probably it is good to indicate the PYTHIA tune here as well. What does "smeared PYTHIA-8" mean? 

It indicates the eTtrg of the PYTHIA-8 curves has been shifted and smeared to account for the resolution on the trigger energy (like we did on the PYTHIA-8 jet pT distributions). I've made the wording consistent with slide 12 and added a hyphen between eTtrg and "shifted" to make it more clear!

https://drupal.star.bnl.gov/STAR/system/files/AndersonTalk_ICHEP2022.v3_0.pdf

 -- Derek

On Thu, Jun 30, 2022 at 11:23 AM Yi Yang <yiyang0429 AT gmail.com> wrote:

Hi Derek, Sorry for the late reply and thanks a lot for the nice slide. Since it is the same as QM22, I only have some very minor comments and questions for your consideration. Just for my own education: - p7, about the TPS definition, what

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Hi Derek,

Sorry for the late reply and thanks a lot for the nice slide. 

Since it is the same as QM22, I only have some very minor comments and questions for your consideration. 

  Just for my own education: 

      - p7, about the TPS definition, what does r^1.5 mean? Why not r^2?  

              How do you know the yellow regions in the plots are 95% pure pi0 and the green regions correspond to photons? 

 - p10: move "steps" to the previous line

 - p12: Why didn't you use the STAR tune? (I believe it has been discussed, so just for my own education)

 - p17: What does "p+p style different" mean? 

 - p18: Probably it is good to indicate the PYTHIA tune here as well. 

            What does "smeared PYTHIA-8" mean? 

 

Cheers,

Yi

On Thu, Jun 30, 2022 at 11:09 AM Derek Anderson via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hi Barbara,

Thanks for the feedback! I've implemented your suggestions in the link below!

https://drupal.star.bnl.gov/STAR/system/files/AndersonTalk_ICHEP2022.v2_0.pdf

 -- Derek

On Wed, Jun 29, 2022 at 9:50 AM Barbara Trzeciak <barbara.trzeciak AT gmail.com> wrote:

Hi Derek, Just minor comments from my side, and I sign off your nice talk. - Title: "200 GeV" should be in one line - s5: add I_AA definition - s7: at the bottom: Small TSP Values -> Small TSP Values: Pi0 Large TSP Values ->

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Hi Derek,

Just minor comments from my side, and I sign off your nice talk.

- Title: "200 GeV" should be in one line

- s5: add I_AA definition

- s7: at the bottom: Small TSP Values -> Small TSP Values: Pi0

Large TSP Values -> Large TSP Values: \gamma_rich

- s13: you show the comparison to Pythia on the next slide, I would remove related bullets from this slide.

Cheers,

Barbara

On Wed, Jun 29, 2022 at 6:14 AM Nihar Sahoo via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Derek,

I sign off your talk.

Enjoy the conference.
Nihar

On 2022-06-28 01:18, Derek Anderson wrote:
> Hi Nihar and Sooraj,
>
> Thanks for the feedback! I've implemented your suggestions in the link
> below, and included a response below!
>
>> On the title slide, whats the 6 on top right?
> It's part of the conference dates: the conference runs from July 6th
> to the 13th!
>
> https://drupal.star.bnl.gov/STAR/system/files/AndersonTalk_ICHEP2022.v1_manualAnimations_0.pdf
>
>  -- Derek
>
> On Mon, Jun 27, 2022 at 5:44 AM Sooraj Radhakrishnan
> <skradhakrishnan AT lbl.gov> wrote:
>
>> Hi Derek, Your presentation is same as from QM 2022. I sign off
>> with a couple of minor comments On the title slide, whats the 6 on
>> top right? S2: hard partons are produced in early stages of
>> collisions, but not jets as such. May be change to
>> ZjQcmQRYFpfptBannerStart
>>
>> This Message Is From an External Sender
>> This message came from outside your organization.
>>
>> ZjQcmQRYFpfptBannerEnd
>> Hi Derek,
>> Your presentation is same as from QM 2022. I sign off with a
>> couple of minor comments
>>
>> On the title slide, whats the 6 on top right?
>> S2: hard partons are produced in early stages of collisions, but not
>> jets as such. May be change to hard partons produced in early ...
>>
>> thanks
>> Sooraj
>>
>> On Mon, Jun 27, 2022 at 8:26 AM Nihar Sahoo via Star-hp-l
>> <star-hp-l AT lists.bnl.gov> wrote:
>>
>>> Hello Derek,
>>>
>>> Your slides look good.
>>> As the content and format of your talk are the same with QM2022,
>>> hence I
>>> have only a few comments on Slide#2.
>>>
>>> Slide#2:
>>> "Heavy-ion collisions produce a hot, dense medium consistent with
>>> QGP"
>>> -> "Heavy-ion collisions produce a hot and dense QCD medium known
>>> as
>>> Quark-Gluon Plasma (QGP)"
>>>
>>> "Jets: collimated sprays of hadrons from the fragmentation of
>>> partons"
>>> -> "Jets: collimated sprays of hadrons from the fragmentation of
>>> energetic partons produced from high-Q^2 process"
>>>
>>> “flavor”of jet,etc. ->  color factor of parton, etc.
>>> (Flavor of jet is a bit confusing as flavor of
>>> quark in
>>> QCD is meaningful; but here you mean quark vs gluon color factor)
>>>
>>> cheers
>>> Nihar
>>>
>>> On 2022-06-25 06:41, Derek Anderson via Star-hp-l wrote:
>>>> Hi all,
>>>>
>>>> Please find my slides for ICHEP in the previous message. They're
>>>> largely identical to what we showed at QM, the only real changes
>>> being
>>>> minor visual changes and an additional slide on jets and the QGP
>>> since
>>>> this is a more general conference. Any comments or suggestions
>>> are
>>>> more than welcome!
>>>>
>>>> -- Derekat
>>>>
>>>> On Fri, Jun 24, 2022 at 7:08 PM webmaster--- via Star-hp-l
>>>> <star-hp-l AT lists.bnl.gov> wrote:
>>>>
>>>>> Dear Star-hp-l AT lists.bnl.gov members, Derek Anderson
>>>>> (dmawxc AT physics.tamu.edu) has submitted a material for a
>>> review,
>>>>> please have a look:
>>>>>
>>>>
>>>
>>
> https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/node/60054__;!!KwNVnqRv!Fqgg4ZL9nvqQGCe4ZkZYJV-Y55qx56ILnh0Dcx0lqNnEji6zZLrA0ZSW_eQx6HNTEOUdqwZoP_57DcXiLrH0GbGoijt6RA$
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>>>>> This Message Is From an External Sender
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>>>>>
>>>>> Dear Star-hp-l AT lists.bnl.gov members,
>>>>>
>>>>> Derek Anderson (dmawxc AT physics.tamu.edu) has submitted a
>>> material
>>>>> for a
>>>>> review, please have a look:
>>>>>
>>>>
>>>
>>
> https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/node/60054__;!!KwNVnqRv!Fqgg4ZL9nvqQGCe4ZkZYJV-Y55qx56ILnh0Dcx0lqNnEji6zZLrA0ZSW_eQx6HNTEOUdqwZoP_57DcXiLrH0GbGoijt6RA$
>>>>>
>>>>>
>>>>> ---
>>>>> If you have any problems with the review process, please
>>> contact
>>>>> webmaster AT www.star.bnl.gov
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>>>>>
>>>>
>>>
>>
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>>
>> --
>>
>> 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 [2]
>>
>> Email: skradhakrishnan AT lbl.gov
>
>
> Links:
> ------
> [1]
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