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

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 118, 022003 – Published 11 January 2017

Abstract

The first full amplitude analysis of B+J/ψϕK+ with J/ψμ+μ, ϕK+K decays is performed with a data sample of 3fb1 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 has mass consistent with, but width much larger than, previous measurements of the claimed X(4140) state.

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  • Received 25 June 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.022003

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2017 CERN, for the LHCb Collaboration

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

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See Also

Amplitude analysis of B+J/ψϕK+ decays

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. D 95, 012002 (2017)

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Issue

Vol. 118, Iss. 2 — 13 January 2017

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