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Article Dans Une Revue Physical Review Letters Année : 2017

Observation of J/ψφ structures consistent with exotic states from amplitude analysis of B+→J/ψφK+ decays

R. Aaij
  • Fonction : Auteur
J. Cogan
O. Leroy
J. Serrano

Résumé

The first full amplitude analysis of B+→J/ψϕK+ with J/ψ→μ+μ−, ϕ→K+K− decays is performed with a data sample of 3 fb−1 of pp collision data collected at 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 ϕK+, and four J/ψϕ 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 is best described as a D±sD∗∓s cusp, but a resonant interpretation is also possible with mass consistent with, but width much larger than, previous measurements of the claimed X(4140) state.
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Dates et versions

in2p3-01338794 , version 1 (20-09-2023)

Identifiants

Citer

R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Observation of J/ψφ structures consistent with exotic states from amplitude analysis of B+→J/ψφK+ decays. Physical Review Letters, 2017, 118, pp.022003. ⟨10.1103/PhysRevLett.118.022003⟩. ⟨in2p3-01338794⟩
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