The forward eta mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at root s = 13 TeV. This paper presents the measurement of the inclusive production rate of eta in pT< 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 eta 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.
Measurement of the forward η meson production rate in p-p collisions at $$ \sqrt{\textrm{s}} $$ = 13 TeV with the LHCf-Arm2 detector / Adriani, O., Berti, E., Betti, P., Bonechi, L., Bongi, M., D’Alessandro, R., Detti, S., Hagenauer, M., Itow, Y., Kasahara, K., Kitagami, Y., Kondo, M., Matsubara, Y., Menjo, H., Muraki, Y., Ohashi, K., Papini, P., Piparo, G., Ricciarini, S., Sako, T., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - ELETTRONICO. - 2023:(2023), pp. 169.1-169.20. [10.1007/jhep10(2023)169]
Measurement of the forward η meson production rate in p-p collisions at $$ \sqrt{\textrm{s}} $$ = 13 TeV with the LHCf-Arm2 detector
Adriani, O.;Betti, P.;Bongi, M.;D’Alessandro, R.;Tiberio, A.;
2023
Abstract
The forward eta mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at root s = 13 TeV. This paper presents the measurement of the inclusive production rate of eta in pT< 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 eta 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.
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