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[Star-tf-tunepy-l] LHCb forward PYTHIA 8 tune from their Z+jet FF paper

From: Raghav Kunnawalkam Elayavalli <kunnawalkamraghav AT gmail.com>
To: STAR task force for tuning PYTHIA <star-tf-tunepy-l AT lists.bnl.gov>
Subject: [Star-tf-tunepy-l] LHCb forward PYTHIA 8 tune from their Z+jet FF paper
Date: Fri, 25 Jun 2021 09:35:53 -0400

Hi All,

Following up from our discussion during the last meeting, I talked with Joe Osborn who was one of the PAs of the LHCb Z+jet FF paper https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.232001 and he actually pointed me to their supplemental material linked in the pdf below that details their PYTHIA 8 tune.

https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.123.232001/Supplemental.pdf

The LHCb tune also has different values for the two parameters (ecmPow and expPow) that we are currently tuning and they use a significantly higher value for both.

MultipartonInteractions:pT0Ref = 2.88

MultipartonInteractions:ecmPow = 0.238

There are additional interesting parameters related to the strings which we have not touched so far…

Cheers

Raghav

**************************************

Raghav Kunnawalkam Elayavalli

email: raghav.ke AT yale.edu

Associate Research Scientist

Yale University and

Brookhaven National Lab

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[Star-tf-tunepy-l] LHCb forward PYTHIA 8 tune from their Z+jet FF paper, Raghav Kunnawalkam Elayavalli, 06/25/2021