Invariant jet mass measurements in pp collisions at s =200 GeV at RHIC

STAR Collaboration

doi:10.1103/PhysRevD.104.052007

Invariant jet mass measurements in pp collisions at s =200 GeV at RHIC

STAR Collaboration

Instituto de Alta Investigación

American University in Cairo
Brookhaven National Laboratory
AGH University of Krakow
Ohio State University
University of Kentucky
Joint Institute for Nuclear Research
Panjab University
Variable Energy Cyclotron Centre
Russian Research Centre Kurchatov Institute
Moscow Engineering Physics Institute
Texas A&M University
Central China Normal University
Kent State University
Universidad de Tarapacá
University of California at Riverside
University of Houston
Stony Brook University
University of Jammu
Czech Technical University in Prague
Czech Academy of Sciences
Rice University
Chinese Academy of Sciences
Yale University
University of California at Davis
Lawrence Berkeley National Laboratory
University of California at Los Angeles
National Cheng Kung University
Shandong University
Fudan University
University of Science and Technology of China
Tsinghua University
University of California at Berkeley
Eötvös Loránd University
Abilene Christian University
Heidelberg University
Institute for High Energy Physics
Wayne State University
University of Tsukuba
University of Illinois at Chicago
Lehigh University
Purdue University
Southern Connecticut State University
Technische Universität Darmstadt
Temple University
Valparaiso University
Indian Institute of Science Education and Research, Tirupati
CAS - Institute of Modern Physics
Pennsylvania State University
Indiana University Bloomington
Warsaw University of Technology
Goethe University Frankfurt
National Institute of Science Education and Research
University of Texas at Austin
Rutgers - The State University of New Jersey, New Brunswick
Indian Institute of Science Education and Research, Berhampur
Institute of Nuclear Physics PAN
Max Planck Institute for Physics (Werner Heisenberg Institute)
Creighton University
Indian Institute of Technology Patna
Argonne National Laboratory
Universidade de São Paulo
Huzhou University
Michigan State University
United States Naval Academy

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22 Citas (Scopus)

Resumen

We present the first inclusive measurements of the invariant and softdrop jet mass in proton-proton collisions at s=200 GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned pythia-6 reproduces the data, while LHC tunes of pythia-8 and herwig-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that softdrop grooming, for which the contribution of wide-angle nonperturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both pythia-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC.

Idioma original	Inglés
Número de artículo	052007
Publicación	Physical Review D
Volumen	104
N.º	5
DOI	https://doi.org/10.1103/PhysRevD.104.052007
Estado	Publicada - 1 sept 2021

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title = "Invariant jet mass measurements in pp collisions at s =200 GeV at RHIC",

abstract = "We present the first inclusive measurements of the invariant and softdrop jet mass in proton-proton collisions at s=200 GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned pythia-6 reproduces the data, while LHC tunes of pythia-8 and herwig-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that softdrop grooming, for which the contribution of wide-angle nonperturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both pythia-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC.",

author = "Abdallah, \{M. S.\} and J. Adam and L. Adamczyk and Adams, \{J. R.\} and S. Kabana and \{STAR Collaboration\}",

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AU - Adam, J.

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AU - Kabana, S.

AU - STAR Collaboration

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AB - We present the first inclusive measurements of the invariant and softdrop jet mass in proton-proton collisions at s=200 GeV at STAR. The measurements are fully corrected for detector effects, and reported differentially in both the jet transverse momentum and jet radius parameter. We compare the measurements to established leading-order Monte Carlo event generators and find that STAR-tuned pythia-6 reproduces the data, while LHC tunes of pythia-8 and herwig-7 do not agree with the data, providing further constraints on parameter tuning. Finally, we observe that softdrop grooming, for which the contribution of wide-angle nonperturbative radiation is suppressed, shifts the jet mass distributions into closer agreement with the partonic jet mass as determined by both pythia-8 and a next-to-leading-logarithmic accuracy perturbative QCD calculation. These measurements complement recent LHC measurements in a different kinematic region, as well as establish a baseline for future jet mass measurements in heavy-ion collisions at RHIC.

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Invariant jet mass measurements in pp collisions at s =200 GeV at RHIC

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