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cc by (c) CERN; LHCb Collaboration, 2017
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/132847

Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B+→J/ψϕK+ Decays

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The first full amplitude analysis of B+ -> J/psi phi K+ with J/psi -> mu(+)mu(-), phi -> K+K- decays is performed with a data sample of 3 fb(-1) of pp collision data collected at root s = 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into phi K+ , and four J/psi phi structures are observed, each with significance over 5 standard deviations. The quantum numbers of these structures are determined with significance of at least 4 standard deviations. The lightest has mass consistent with, but width much larger than, previous measurements of the claimed X(4140) state.

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BADALOV, Alexey, CALVO GÓMEZ, Míriam, GARRIDO BELTRÁN, Lluís, GASCÓN FORA, David, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, MARIN BENITO, Carla, PICATOSTE OLLOQUI, Eduardo, RIVES MOLINA, Vicente josé, VILASIS-CARDONA, Xavier, LHCb Collaboration. Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B+→J/ψϕK+ Decays. _Physical Review Letters_. 2017. Vol. 118, núm. 2, pàgs. 022003. [consulta: 20 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/132847]

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