STAR task force for tuning PYTHIA

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

Hi Zilong,

This is really interesting. Clearly we need to tune away these shape changes. What I am really surprised by is the huge shift in absolute Xsec from PYTHIA 6->8.  I wonder if this is also due to a sqrt(s) scaling?

Thanks,

Renee

On Fri, Apr 23, 2021 at 5:24 PM Chang, Zilong via Star-tf-tunepy-l <star-tf-tunepy-l AT lists.bnl.gov> wrote:

Hi guys,

I used the PYTHIA8.2.35 default tune installed under StRoot (first link below) to generate the inclusive jet cross-section and compared it to the run12 pp510 GeV preliminary results. You can find my results at the second link below. The PYTHIA8 seems to under-predicate the measured cross-section at low jet p_T, but over-estimate it at high jet p_T.

https://www.star.bnl.gov/cgi-bin/protected/viewvc.cgi/cvsroot/StRoot/StarGenerator/Pythia8_2_35/

https://drupal.star.bnl.gov/STAR/system/files/Pythia8tune_pp510.pdf

Thanks,

Zilong

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