https://doi.org/10.1140/epja/s10050-022-00723-9
Regular Article - Theoretical Physics
Experimental constraints on the properties of
states
1
Department of Physics, Swansea University, Singleton Park, SA2 8PP, Swansea, UK
2
Department of Physics and Astronomy, University of Pittsburgh, 15260, Pittsburgh, PA, USA
Received:
19
January
2022
Accepted:
3
April
2022
Published online:
16
April
2022
Using new experimental data on photoproduction and decays, we derive constraints on the properties of the LHCb
states. We conclude that
,
and
can be described as
,
and
molecules, but that
does not fit into the same picture. Based on the apparent absence of additional partner states, and the striking disparity between
and
decays, we conclude that
has
quantum numbers. Using heavy-quark symmetry we predict large experimental signals for
states in
,
, and
. We also argue that current experimental data on photoproduction is almost at the level of sensitivity required to observe
states.
© The Author(s) 2022
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/.