Recent results at the ϕ-meson region from the CMD-3 detector at the VEPP-2000 collider

Vyacheslav Ivanov; Evgeny Solodov; Evgeny Kozyrev; Georgiy Razuvaev

doi:10.1051/epjconf/201816600019

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 166, 00019 (2018)
https://doi.org/10.1051/epjconf/201816600019

Recent results at the ϕ-meson region from the CMD-3 detector at the VEPP-2000 collider

Vyacheslav Ivanov^*, Evgeny Solodov, Evgeny Kozyrev and Georgiy Razuvaev

Budker Institute of Nuclear Physics, 11, akademika Lavrentieva prospect, Novosibirsk, 630090 Russia

^* Corresponding author: vyacheslav_lvovich_ivanov@mail.ru

Published online: 5 January 2018

Abstract

This report is devoted to the recent results of the study of the processes e⁺e⁻ → K_SK_L, K⁺K⁻, π⁺π⁻2π⁰, 2π⁺2π⁻, ηγ at the ϕ-meson region with the CMD-3 detector at the VEPP-2000 collider. From the combined analysis of K_SK_L and K⁺K⁻ final states the ϕ-meson parameters were measured, and the obtained ratio of g_ϕK⁺K⁻ and g_{ϕK_SK_L} couplings was found to be compatible with the isospin symmetry. From the analyzes of the π⁺π⁻2π⁰ and 2π⁺2π⁻ final states the branching ratios ℬ(ϕ → π⁺π⁻2π⁰) and ℬ(ϕ → 2π⁺2π⁻) were determined.

© The Authors, published by EDP Sciences, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).