DOE OSTI · 3368770
Cross sections of 𝜂 mesons in 𝑝 +𝑝 collisions at forward rapidity at $\sqrt{𝑠}$ = 500 GeV and central rapidity at $\sqrt{𝑠}$ = 510 GeV
Abstract
We present the first measurements of the forward and midrapidity 𝜂-meson cross sections from 𝑝 + 𝑝 collisions at $\sqrt{𝑠}$ = 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.
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Abdulameer, N. J. [Debrecen University; HUN-REN ATOMKI], Acharya, U. [Georgia State University] (ORCID:000000018560963X), Adare, A. [University of Colorado], Aidala, C. [Los Alamos National Laboratory; University of Michigan] (ORCID:0000000195404988), Ajitanand, N. N. [Stony Brook University], Akiba, Y. [RIKEN Nishina Center for Accelerator-Based Science; Brookhaven National Laboratory] (ORCID:0009000103093914), Akimoto, R. [University of Tokyo], Al-Ta’ani, H. [New Mexico State University], Alexander, J. [Stony Brook University], Alfred, M. [Howard University], Anderson, D. [Iowa State University], Andrews, K. R. [Abilene Christian University], Angerami, A. [Columbia University], Antsupov, S. [Saint Petersburg State Polytechnic University], Aoki, K. [High Energy Accelerator Research Organization; RIKEN Nishina Center for Accelerator-Based Science], Apadula, N. [Iowa State University; Stony Brook University] (ORCID:0000000254786120), Appelt, E. [Vanderbilt University], Aramaki, Y. [University of Tokyo; RIKEN Nishina Center for Accelerator-Based Science], Armendariz, R. [University of California-Riverside], Asano, H. [Kyoto University; RIKEN Nishina Center for Accelerator-Based Science], Aschenauer, E. C. [Brookhaven National Laboratory], Atomssa, E. T. [Stony Brook University], Awes, T. C. [Oak Ridge National Laboratory], Azmoun, B. [Brookhaven National Laboratory] (ORCID:0000000198243446), Babintsev, V. [Institute for High Energy Physics], Bai, M. [Brookhaven National Laboratory], Bandara, N. S. [University of Massachusetts], Bannier, B. [Stony Brook University], Bannikov, E. [Saint Petersburg State Polytechnic University], Barish, K. N. [University of California-Riverside] (ORCID:0000000314610726), Bassalleck, B. [University of New Mexico], Basye, A. T. [Abilene Christian University], Bathe, S. [City University of New York; Brookhaven National Laboratory] (ORCID:0000000251543801), Baublis, V. [Petersburg Nuclear Physics Institute], Baumann, C. [Brookhaven National Laboratory; University of Münster], Bazilevsky, A. [Brookhaven National Laboratory] (ORCID:0009000855779791), Beaumier, M. [University of California-Riverside], Beckman, S. [University of Colorado], Belmont, R. [University of Colorado; University of North Carolina at Greensboro] (ORCID:0000000151691698), Ben-Benjamin, J. [Muhlenberg College], Bennett, R. [Stony Brook University], Berdnikov, A. [Saint Petersburg State Polytechnic University] (ORCID:0000000337057898), Berdnikov, Y. [Saint Petersburg State Polytechnic University] (ORCID:0000000303095917), Bichon, L. [Vanderbilt University], Black, D. [University of California-Riverside], Blankenship, B. [Vanderbilt University], Blau, D. S. [National Research Center “Kurchatov Institute; National Research Nuclear University], Bok, J. S. [New Mexico State University; Yonsei University], Borisov, V. [Saint Petersburg State Polytechnic University], Boyle, K. [Brookhaven National Laboratory], Brooks, M. L. [Los Alamos National Laboratory], Broxmeyer, D. [Muhlenberg College], Bryslawskyj, J. [City University of New York; University of California-Riverside] (ORCID:0000000226884428), Buesching, H. [Brookhaven National Laboratory], Bumazhnov, V. [Institute for High Energy Physics], Bunce, G. [Brookhaven National Laboratory; Brookhaven National Laboratory], Butsyk, S. [Los Alamos National Laboratory], Campbell, S. [Columbia University; Iowa State University; Stony Brook University], Castera, P. [Stony Brook University], Chaitanya, P. [Stony Brook University], Chen, C.-H. [Brookhaven National Laboratory; Stony Brook University], Chen, D. [Stony Brook University] (ORCID:0009000113362399), Chi, C. Y. [Columbia University], Chiu, C. [University of Michigan], Chiu, M. [Brookhaven National Laboratory] (ORCID:0000000193829093), Choi, I. J. [University of Illinois at Urbana-Champaign; Yonsei University], Choi, J. B. [Jeonbuk National University], Choudhury, R. K. [Bhabha Atomic Research Centre], Christiansen, P. [Lund University], Chujo, T. [University of Tsukuba] (ORCID:000000015433969X), Chvala, O. [University of California-Riverside], Cianciolo, V. [Oak Ridge National Laboratory], Citron, Z. [Stony Brook University; Weizmann Institute], Cole, B. A. [Columbia University], del Valle, Z. Conesa [Laboratoire Leprince-Ringuet], Connors, M. [Georgia State University; Brookhaven National Laboratory] (ORCID:0000000285881657), Corliss, R. [Stony Brook University] (ORCID:0000000255154563), Csanád, M. [Eötvös Loránd University], Csörgő, T. [Institute of Technology; Institute for Particle and Nuclear Physics], Csörgő, T. [Institute for Particle and Nuclear Physics], D’Orazio, L. [University of Maryland], Dairaku, S. [Kyoto University; RIKEN Nishina Center for Accelerator-Based Science], Datta, A. [University of Massachusetts; University of New Mexico] (ORCID:0000000326957719), Daugherity, M. S. [Abilene Christian University], David, G. [Brookhaven National Laboratory; Stony Brook University], Dayananda, M. K. [Georgia State University], DeBlasio, K. [University of New Mexico], Dehmelt, K. [Stony Brook University] (ORCID:0000000232471857), Denisov, A. [Institute for High Energy Physics], Deshpande, A. [Brookhaven National Laboratory; Stony Brook University] (ORCID:0000000337244749), Desmond, E. J. [Brookhaven National Laboratory], Dharmawardane, K. V. [New Mexico State University], Dietzsch, O. [Universidade de São Paulo], Ding, L. [Iowa State University], Dion, A. [Iowa State University; Stony Brook University], Donadelli, M. [Universidade de São Paulo], Doomra, V. [Stony Brook University], Do, J. H. [Yonsei University], Drapier, O. [Laboratoire Leprince-Ringuet], Drees, A. [Stony Brook University] (ORCID:0000000336721259). 2026-05-15. Cross sections of 𝜂 mesons in 𝑝 +𝑝 collisions at forward rapidity at $\sqrt{𝑠}$ = 500 GeV and central rapidity at $\sqrt{𝑠}$ = 510 GeV. https://doi.org/10.1103/zvkl-wrlc
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