STAR task force for tuning PYTHIA

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

Hi Matt, all,

I won't be able to attend the meeting this afternoon but I wanted to bring to your attention reference 28 in the CMS tune paper (which is fantastic  and I am still reading it).  I wanted to point out two interesting things in the reference article https://arxiv.org/abs/1801.02536  :

1) They have already tuned pT0 for  sqrt(s) = 300 GeV!  Now of course this is with NNPDF3.0  so we cannot compare  our current tune to theirs.  But this just gives us another good reason to move to a tune with NNPDF3.0.

2) They suggest modifying the form of pT0 to include a constant term. When they do this for LO PDFs they are able to really change the low pT disagreement between and data/simulation (see Figure 3).  I think we should consider doing this but it may require augmenting PYTHIA code, which sounds like a pain.

Thanks,

Renee

On Wed, Jun 30, 2021 at 9:01 AM Matthew Kelsey via Star-tf-tunepy-l <star-tf-tunepy-l AT lists.bnl.gov> wrote:

Hi all,

Let’s have our regular meeting today at 3 PM BNL time to discuss ongoing activities. I have copied the Zoom details below.

Cheers,
Matt

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

Topic: STAR PYTHIA 8 Tune Task Force
Time: Jun 30, 2021 03:00 PM Eastern Time (US and Canada)

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