STAR task force for tuning PYTHIA

["Fatemi, Renee" <rhfate2 AT g.uky.edu>]

Hi Matt,

Unfortunately I don't think I will be able to attend tomorrow - so many conflicting meetings.  But I will be really interested to hear what Christian says. Will we have a 3pm meeting tomorrow and if so will you summarize your discussion there?

Thanks,

Renee

On Tue, Jun 15, 2021 at 11:26 AM Matthew Kelsey via Star-tf-tunepy-l <star-tf-tunepy-l AT lists.bnl.gov> wrote:

Hi all,

As promised here are some discussion slides for tomorrow if there are any comments/suggestions. 

Cheers,

Matt

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

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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