An amplitude analysis of flavor-untagged B0s → 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 4337þ7 þ2 MeV and a width of 29þ26 þ14 MeV is found, where the first −4 −2 −12 −14 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.

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

Lusiani, A.;Morello, M. J.;Pica, L.;
2022

Abstract

An amplitude analysis of flavor-untagged B0s → 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 4337þ7 þ2 MeV and a width of 29þ26 þ14 MeV is found, where the first −4 −2 −12 −14 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.
2022
Settore FIS/01 - Fisica Sperimentale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/129083
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