Cross sections of η mesons in p + p collisions at forward rapidity at s = 500 GeV and central rapidity at s = 510 GeV
Open Access
- 15 May 2026
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 113 (9)
Abstract
We present the first measurements of the forward and midrapidity η -meson cross sections from p + p collisions at s = 500 and 510 GeV, respectively. We also report the midrapidity η / π 0 ratio at 510 GeV. The forward cross section is measured differentially in η -meson transverse momentum ( p T ) from 1.0 to 6.5 GeV / c for pseudorapidity 3.0 < | η | < 3.8 . The midrapidity cross section is measured from 3.5 to 44 GeV / c for pseudorapidity | η | < 0.35 . Both cross sections serve as critical inputs to an updated global analysis of the η -meson fragmentation functions.Keywords
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Funding Information
- Nuclear Physics
- Office of Science
- U.S. Department of Energy
- National Science Foundation
- Abilene Christian University
- Research Foundation for the State University of New York
- Vanderbilt University
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- National Natural Science Foundation of China
- Hrvatska Zaklada za Znanost
- Ministarstvo znanosti i obrazovanja
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Centre National de la Recherche Scientifique
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives
- Institut National de Physique Nucléaire et de Physique des Particules
- Hungarian Research Network
- Nemzeti Kutatási Fejlesztési és Innovációs Hivatal
- Department of Atomic Energy, Government of India
- Department of Science and Technology, Ministry of Science and Technology, India
- Israel Science Foundation
- National Research Foundation of Korea
- Ministry of Science and ICT, South Korea
- Ministry of Education and Science of the Russian Federation
- Russian Academy of Sciences
- Federal Agency of Atomic Energy of the Russian Federation
- Knut och Alice Wallenbergs Stiftelse
- CRDF Global
- Hungarian-American Enterprise Scholarship Fund
- United States-Israel Binational Science Foundation
- J. Bolyai Research Scholarship
- MATE KKF
- Hungarian Scientific Research Fund
- University of Zambia
- US-Hungarian Fulbright Foundation
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