pythia8 underlying event tune for RHIC energies

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

doi:10.1103/physrevd.105.016011

Title: pythia8 underlying event tune for RHIC energies

Journal Article · 11 January 2022 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.105.016011 · OSTI ID:1839336

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Univ. of Kentucky, Lexington, KY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Yale Univ., New Haven, CT (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Shandong Univ., Qingdao, Shandong (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Indiana Univ., Bloomington, IN (United States)
Wayne State Univ., Detroit, MI (United States)

We report an underlying event tune for the pythia8 Monte Carlo event generator that is applicable for hadron collisions primarily at $$\sqrt{s}$$ 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 $$\sqrt{s}$$ = 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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: AC02-05CH11231; SC0012704

OSTI ID:: 1839336

Alternate ID(s):: OSTI ID: 1836809; OSTI ID: 1856225

Report Number(s):: BNL-222496-2021-JAAM; ark:/13030/qt18t8d264; TRN: US2305120

Journal Information:: Physical Review. D., Vol. 105, Issue 1; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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