Cross sections of η mesons in p + p collisions at forward rapidity at s = 500 GeV and central rapidity at s = 510 GeV

Physical review. D/Physical review. D. 2026 Open access

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Authors: N.J. Abdulameer, U. Acharya, A. Adare, C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta'ani, J. Alexander, M. Alfred, D. A. Anderson, K. R. Andrews
+88 more A. Angerami, S Antsupov, K. Aoki, N. Apadula, E. Appelt, Y. Aramaki, R. Armendariz, H. Asano, E. C. Aschenauer, E.T. Atomssa, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, N. S. Bandara, B. Bannier, E. Bannikov, Kenneth N. Barish, B. Bassalleck, A. Basye, S. Bathe, V. V. Baublis, C. Baumann, A. Bazilevsky, M. Beaumier, S. Beckman, Ron Belmont, J. Ben-Benjamin, R. Bennett, A. Berdnikova, Yaroslav A. Berdnikov, L. Bichon, D. Black, B. Blankenship, D. S. Blau, J. S. Bok, V. Borisov, K. Boyle, M. L. Brooks, D. Broxmeyer, Jason Bryslawskyj, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, S. Campbell, P. Castera, P. Chaitanya, C.-H. Chen, D. Chen, C. Y. Chi, C. Chiu, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa del Valle, M. Connors, R. Corliss, M Csanád, T. Csörgő, T. Csörgő, L. D’Orazio, S. Dairaku, Abhisek Datta, M. Daugherity, G. David, M. K. Dayananda, K. DeBlasio, K. Dehmelt, A. Denisov, Abhay Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, L. Ding, A. Dion, M. Donadelli, V. Doomra, J. H. Do, O. Drapier, Axel Drees
DOI: 10.1103/zvkl-wrlc
Cited by: 1
References: 47

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.

Fields of Study & Subjects

High-Energy Particle Collisions Research Particle physics theoretical and experimental studies Quantum Chromodynamics and Particle Interactions

Publication details

Journal / source
Physical review. D/Physical review. D.
Publisher
American Physical Society (APS)
Volume
113
Issue
9
Publication date
23 February 2026
Language
EN