Pythia 8 underlying event tune for RHIC energies

Manny Rosales Aguilar, Zilong Chang, Raghav Kunnawalkam Elayavalli, Renee Fatemi, Yang He, Yuanjing Ji, Dmitry Kalinkin, Matthew Kelsey, Isaac Mooney, Veronica Verkest

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We report an underlying event tune for the pythia8 Monte Carlo event generator that is applicable for hadron collisions primarily at s ranges available at the Relativistic Heavy-Ion Collider (RHIC). We compare our new pythia8 tuned predictions to midrapidity inclusive π± spectra, jet substructure, Drell-Yan production, and underlying event measurements from RHIC and the Tevatron, as well as underlying event data from the Large Hadron Collider. With respect to the default pythia8 Monash Tune, the new "Detroit"tune shows significant improvements in the description of the experimental data. Additionally, we explore the validity of pythia8 predictions for forward rapidity π in s=200 GeV collisions, where neither tune is able to sufficiently describe the data. We advocate for the new tune to be used for pythia8 studies at current and future RHIC experiments, and discuss future tuning exercises at lower center-of-mass energies, where forward/backward kinematics are essential at the upcoming Electron-Ion Collider.

Original languageEnglish
Article number016011
JournalPhysical Review D
Issue number1
StatePublished - Jan 1 2022

Bibliographical note

Publisher Copyright:
© 2022 authors. Published by the American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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