Abstract
Two new excited states, and , are observed in the invariant-mass spectrum using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of . Five previously observed excited states are confirmed, namely , , , , and . The masses and widths of these seven states are measured with the highest precision to date.
- Received 10 February 2023
- Revised 26 April 2023
- Accepted 26 June 2023
DOI:https://doi.org/10.1103/PhysRevLett.131.131902
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