Measurement of the forward η meson production rate in p-p collisions at s $$ \sqrt{\textrm{s}} $$ = 13 TeV with the LHCf-Arm2 detector
oleh: O. Adriani, E. Berti, P. Betti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Hagenauer, Y. Itow, K. Kasahara, Y. Kitagami, M. Kondo, Y. Matsubara, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, G. Piparo, S. Ricciarini, T. Sako, N. Sakurai, M. Scaringella, Y. Shimizu, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, K. Yoshida
| Format: | Article |
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| Diterbitkan: | SpringerOpen 2023-10-01 |
Deskripsi
Abstract The forward η mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at s $$ \sqrt{s} $$ = 13 TeV. This paper presents the measurement of the inclusive production rate of η in p T < 1.1 GeV/c, expressed as a function of the Feynman-x variable. These results are compared with the predictions of several hadronic interaction models commonly used for the modelling of the air showers produced by ultra-high energy cosmic rays. This is both the first measurement of η mesons from LHCf and the first time a particle containing strange quarks has been observed in the forward region for high-energy collisions. These results will provide a powerful constraint on hadronic interaction models for the purpose of improving the understanding of the processes underlying the air showers produced in the Earth’s atmosphere by ultra-energetic cosmic rays.