Investigation of the lightest hybrid meson candidate with a coupled-channel analysis of -, - and -Data
Ruhr-Universität Bochum, 44801, Bochum, Germany
2 Shandong University, 266237, Qingdao, China
Accepted: 9 November 2021
Published online: 1 December 2021
A sophisticated coupled-channel analysis is presented that combines different processes: the channels , and from annihilations, the P- and D-wave amplitudes of the and systems produced in scattering, and data from -scattering reactions. Hence our analysis combines the data sets used in two independent previous analyses published by the Crystal Barrel experiment and by the JPAC group. Based on the new insights from these studies, this paper aims at a better understanding of the spin-exotic resonances in the light-meson sector. By utilizing the K-matrix approach and realizing the analyticity via Chew-Mandelstam functions the amplitude of the spin-exotic wave can be well described by a single pole for both systems, and . The mass and the width of the -pole are measured to be and .
© The Author(s) 2021
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