Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC

STAR Collaboration

doi:10.1016/j.physletb.2024.138966

Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC

STAR Collaboration

Institute of Higher Research

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

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from s=200 GeV p+p collisions at the Relativistic Heavy Ion Collider (RHIC). The measured ratios C₄/C₂, C₅/C₁, and C₆/C₂ decrease with increased charged-particle multiplicity and rapidity acceptance. Neither the Skellam baselines nor PYTHIA8 calculations account for the observed multiplicity dependence. In addition, the ratios C₅/C₁ and C₆/C₂ approach negative values in the highest-multiplicity events, which implies that thermalized QCD matter may be formed in p+p collisions.

Original language	English
Article number	138966
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	857
DOIs	https://doi.org/10.1016/j.physletb.2024.138966
State	Published - Oct 2024

Keywords

Crossover
Event-by-event fluctuation
Higher-order cumulant
QCD phase diagram

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10.1016/j.physletb.2024.138966

Cite this

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title = "Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC",

abstract = "We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from s=200 GeV p+p collisions at the Relativistic Heavy Ion Collider (RHIC). The measured ratios C4/C2, C5/C1, and C6/C2 decrease with increased charged-particle multiplicity and rapidity acceptance. Neither the Skellam baselines nor PYTHIA8 calculations account for the observed multiplicity dependence. In addition, the ratios C5/C1 and C6/C2 approach negative values in the highest-multiplicity events, which implies that thermalized QCD matter may be formed in p+p collisions.",

keywords = "Crossover, Event-by-event fluctuation, Higher-order cumulant, QCD phase diagram",

author = "Abdulhamid, \{M. I.\} and Aboona, \{B. E.\} and J. Adam and L. Adamczyk and S. Kabana and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)",

year = "2024",

month = oct,

doi = "10.1016/j.physletb.2024.138966",

language = "English",

volume = "857",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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TY - JOUR

T1 - Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC

AU - Abdulhamid, M. I.

AU - Aboona, B. E.

AU - Adam, J.

AU - Adamczyk, L.

AU - Kabana, S.

AU - STAR Collaboration

PY - 2024/10

Y1 - 2024/10

N2 - We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from s=200 GeV p+p collisions at the Relativistic Heavy Ion Collider (RHIC). The measured ratios C4/C2, C5/C1, and C6/C2 decrease with increased charged-particle multiplicity and rapidity acceptance. Neither the Skellam baselines nor PYTHIA8 calculations account for the observed multiplicity dependence. In addition, the ratios C5/C1 and C6/C2 approach negative values in the highest-multiplicity events, which implies that thermalized QCD matter may be formed in p+p collisions.

AB - We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from s=200 GeV p+p collisions at the Relativistic Heavy Ion Collider (RHIC). The measured ratios C4/C2, C5/C1, and C6/C2 decrease with increased charged-particle multiplicity and rapidity acceptance. Neither the Skellam baselines nor PYTHIA8 calculations account for the observed multiplicity dependence. In addition, the ratios C5/C1 and C6/C2 approach negative values in the highest-multiplicity events, which implies that thermalized QCD matter may be formed in p+p collisions.

KW - Crossover

KW - Event-by-event fluctuation

KW - Higher-order cumulant

KW - QCD phase diagram

UR - https://www.scopus.com/pages/publications/85203412765

U2 - 10.1016/j.physletb.2024.138966

DO - 10.1016/j.physletb.2024.138966

M3 - Article

AN - SCOPUS:85203412765

SN - 0370-2693

VL - 857

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 138966

ER -

Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC

Abstract

Keywords

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Cite this

Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC

Abstract

Keywords

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Fingerprint

Cite this

Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in p + p collisions at s=200 GeV from STAR at RHIC