Regular Article – Experimental Physics
Study of dynamics of the process in the energy range 1.15–2.00 GeV
Budker Institute of Nuclear Physics, SB RAS, 630090, Novosibirsk, Russia
2 Novosibirsk State University, 630090, Novosibirsk, Russia
Accepted: 6 October 2020
Published online: 27 October 2020
The dynamics of the process is studied in the energy region from 1.15 to 2.00 GeV using data accumulated with the SND detector at the VEPP-2000 collider. The Dalitz plot distribution and mass spectrum are analyzed in a model including the intermediate states , , and . As a result, the energy dependences of the and cross sections and the relative phases between the amplitude and the and amplitudes are obtained. The cross section has a peak in the energy region of the resonance (1.55–1.75 GeV). In this energy range the contributions of the and states are of the same order of magnitude. No resonance structure near 1.65 GeV is observed in the cross section. We conclude that the intermediate state gives a significant contribution to the decay of , whereas the mechanism dominates in the decay .
© The Author(s) 2020
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3