STAR task force for tuning PYTHIA

[Matthew Kelsey <mkelsey AT wayne.edu>]

Thanks Zilong! Looks good.

As for our regular 3 PM meeting tomorrow, unfortunately I won’t be able to make it this week due to a one-time conflict. However, that shouldn’t be a show-stopper if people still want to meet to discuss, just let me know. If not, let’s talk next week in more detail.

Cheers,

Matt

——————————
Matthew Kelsey 
Postdoctoral Fellow
Wayne State University
<he/him/his>

On Jun 15, 2021, at 4:57 PM, Chang, Zilong <zchang AT bnl.gov> wrote:

[EXTERNAL]

Hi Matt,

Thank you for organizing the meeting. I have uploaded my slides on Drupal page, the link below. Talk to you guys tomorrow,

https://drupal.star.bnl.gov/STAR/system/files/summary_4.pdf

Zilong 

On Jun 14, 2021, at 12:44 PM, Matthew Kelsey via Star-tf-tunepy-l <star-tf-tunepy-l AT lists.bnl.gov> wrote:

Hi all,

I just wanted to remind you this Wed. at 10 am BNL time we will have the discussion with Christian and maybe a few other PYTHIA folks (connection details below). 

Since we won’t have our regular meeting before, I propose the following:

- I will present more-or-less the same material as used for the cold QCD PWG meeting, except for jet material. (Base tune + forward rapidity observations)

- Zilong, if you don’t mind, could you also present your jet 510 GeV studies and add in the 200 GeV plots from Dmitry? (Jet studies)

I think we have a nice discussion in the cold QCD PWG meeting and received some good feedback from our collaborations (summarized below). I think a few of these questions we can discuss with Christian too along.

- Why Monash? Could we try some more recent LHC tunes as a starting point (also see PDF point below)?

- Having separate mid-rapidity and forward-rapidity tunes can be problematic. Can we try (simultaneously) tuning other parameters, e.g., coupling to ISR which will modify forward observables, or intrinsic kT?

- Observation of PYTHIA 8 w/ NNPDF2.3 not getting jet cross-section is not too supposing (compared to CTEQ6L1). Other LHC tunes with newer PDF sets might be a better starting point.

 Please let me know if there are other things to discuss or add. I will prepare slides and send tomorrow.

Cheers,

Matt

——————————
Matthew Kelsey 
Postdoctoral Fellow
Wayne State University
<he/him/his>

https://wayne-edu.zoom.us/j/2134166524?pwd=dFZwWTNjTTB4OHZkaHpxLzZDR3hGUT09

Pass: startune

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