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/ψp and J/ψ(p)over-bar Systems in Bs0 → J/ψp(p)over-bar Decays

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Neri, I.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
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.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; Aiola, S.; Ajaltouni, Z.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500482
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