Evidence for a New Structure in the J /ψp and J /ψ p ¯ Systems in Bs0 →J /ψp p ¯ Decays

(LHCb Collaboration)

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57 Citations (Scopus)


An amplitude analysis of flavor-untagged Bs0→J/ψpp¯ decays is performed using a sample of 797±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 fb-1. Evidence for a new structure in the J/ψp and J/ψp¯ systems with a mass of 4337-4+7 -2+2 MeV and a width of 29-12+26 -14+14 MeV is found, where the first uncertainty is statistical and the second systematic, with a significance in the range of 3.1 to 3.7σ, depending on the assigned JP hypothesis.

Original languageEnglish
Article number062001
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 11 Feb 2022


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