Regular Article - Theoretical Physics
Experimental constraints on the properties of states
Department of Physics, Swansea University, Singleton Park, SA2 8PP, Swansea, UK
2 Department of Physics and Astronomy, University of Pittsburgh, 15260, Pittsburgh, PA, USA
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
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