Search for Resonances in the Mass Spectrum of Two-Photon Events Produced in π+A-Interactions in the Hyperon-M Experiment at the U-70 Accelerator Complex

A. M. Gorin; Горин А. М.; S. V. Evdokimov; Евдокимов С. В.; A. A. Zaytsev; Зайцев А. А.; V. I. Izucheev; Изучеев В. И.; B. V. Polishchuk; Полищук Б. В.; K. A. Romanishin; Романишин К. А.; V. I. Rykalin; Рыкалин В. И.; S. A. Sadovskiy; Садовский С. А.; Yu. V. Kharlov; Харлов Ю. В.

doi:10.31857/S1234567823210012

Search for Resonances in the Mass Spectrum of Two-Photon Events Produced in π+A-Interactions in the Hyperon-M Experiment at the U-70 Accelerator Complex

作者: Gorin A.M.¹, Evdokimov S.V.¹, Zaytsev A.A.², Izucheev V.I.¹, Polishchuk B.V.¹, Romanishin K.A.¹, Rykalin V.I.¹, Sadovskiy S.A.¹, Kharlov Y.V.¹
隶属关系:
1. Institute for High Energy Physics, National Research Center Kurchatov Institute
2. Joint Institute of Nuclear Research
期: 卷 118, 编号 9-10 (11) (2023)
页面: 629-636
栏目: Articles
URL: https://journals.rcsi.science/0370-274X/article/view/246967
DOI: https://doi.org/10.31857/S1234567823210012
EDN: https://elibrary.ru/PRGIQB
ID: 246967

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Studies at the Nuclotron in JINR indicate the presence of a previously unknown resonance-like structure in the two-photon mass spectrum in the region of 300–400 MeV/c², observed in nucleus–nucleus interactions. The goal of this work is to search for such structures in the two-photon mass spectrum in meson–nuclear interactions at a momentum of 7 GeV/c at the Hyperon-M experiment of the U-70 accelerator complex. An upper limit has been established on the ratio of the cross section for the formation of unknown resonance structures to the cross section for the production of $η$ -meson $ρ (R_{\to 2 γ} / η_{\to 2 γ}) < 3.2 \times 10^{- 3}$ at the 95% confidence level.

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卷 121, 编号 9-10 (2025)

Search for Resonances in the Mass Spectrum of Two-Photon Events Produced in π+A-Interactions in the Hyperon-M Experiment at the U-70 Accelerator Complex

全文:

详细

作者简介

A. Gorin

S. Evdokimov

A. Zaytsev

V. Izucheev

B. Polishchuk

K. Romanishin

V. Rykalin

S. Sadovskiy

Yu. Kharlov

参考

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