https://doi.org/10.1140/epjc/s10052-019-6665-z
Regular Article - Theoretical Physics
Description of the
and
states as molecular states
1
College of Nuclear Science and Technology, Beijing Normal University, Beijing, 100875, China
2
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna, Aptdo. 22085, 46071, Valencia, Spain
* e-mail: qixinyu@ific.uv.es
** e-mail: yuqx@mail.bnu.edu.cn
Received:
7
December
2018
Accepted:
8
February
2019
Published online:
25
February
2019
In this work we study several and
states dynamically generated from the meson–baryon interaction in coupled channels, using an extension of the local hidden gauge approach in the Bethe–Salpeter equation. These molecular states appear as poles of the scattering amplitudes, and several of them can be identified with the experimentally observed
states, including the
,
,
,
and
. Also, for the recently reported
state, we find two poles with masses and widths remarkably close to the experimental data, for both the
and
sectors.
© The Author(s), 2019