An amplitude analysis of flavor-untagged B0s → J/ψ p anti-p 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/ψ p and J/ψ anti-p 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 3.7 σ, depending on the assigned J^P hypothesis.
Evidence for a New Structure in the J/ψ p and J/ψ anti-p Systems in B0s → J/ψ p anti-p Decays
Calabrese, R.Membro del Collaboration Group
;Capriotti, L.Membro del Collaboration Group
;Fiorini, M.Membro del Collaboration Group
;Franzoso, E.Membro del Collaboration Group
;Giugliano, C.Membro del Collaboration Group
;Guarise, M.Membro del Collaboration Group
;Luppi, E.Membro del Collaboration Group
;Okamura, S.Membro del Collaboration Group
;Pappalardo, L. L.Membro del Collaboration Group
;Tomassetti, L.Membro del Collaboration Group
;
2022
Abstract
An amplitude analysis of flavor-untagged B0s → J/ψ p anti-p 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/ψ p and J/ψ anti-p 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 3.7 σ, depending on the assigned J^P hypothesis.File in questo prodotto:
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