An amplitude analysis of flavor-untagged B-s(0) -> J=psi p (p) over bar 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=psi p and J=psi(p) over bar systems with a mass of 4337(-4-2)(+7+2) MeV and a width of 29(-12-14)(+26+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 sigma, depending on the assigned J(P) hypothesis.
Aaij, R., Abdelmotteleb, A., Beteta, C.a., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2022). Evidence for a new structure in the J/psi p and J/psi(p)over-bar systems in B-s(0) -> J/psi p(p)over-bar decays. PHYSICAL REVIEW LETTERS, 128(6) [10.1103/PhysRevLett.128.062001].
Evidence for a new structure in the J/psi p and J/psi(p)over-bar systems in B-s(0) -> J/psi p(p)over-bar decays
Archilli, F.;Santovetti, E.Membro del Collaboration Group
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2022-01-01
Abstract
An amplitude analysis of flavor-untagged B-s(0) -> J=psi p (p) over bar 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=psi p and J=psi(p) over bar systems with a mass of 4337(-4-2)(+7+2) MeV and a width of 29(-12-14)(+26+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 sigma, depending on the assigned J(P) hypothesis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
