An amplitude analysis of flavor-untagged $B_s^0\to J/\psi p\overline{p}$ decays is performed using a sample of $797\pm 31$ decays reconstructed with the LHCb detector. The data, collected in proton-proton collisions between 2011 and 2018, correspond to an integrated luminosity of $9{\mathrm{fb}}^{-1}$. Evidence for a new structure in the $J/\psi p$ and $J/\psi \overline{p}$ systems with a mass of ${4337}_{-4}^{+7}{}_{-2}^{+2}\mathrm{MeV}$ and a width of ${29}_{-12}^{+26}{}_{-14}^{+14}\mathrm{MeV}$ is found, where the first uncertainty is statistical and the second systematic, with a significance in the range of 3.1 to $3.7\sigma$, depending on the assigned $J^P$ hypothesis.

• Received 11 August 2021
• Revised 29 November 2021
• Accepted 5 January 2022

DOI:https://doi.org/10.1103/PhysRevLett.128.062001

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