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

# metadata.dc.description.abstract[].value
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.

# metadata.dc.rights[].value
cc by (c) CERN; LHCb Collaboration, 2017

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B+→J/ψϕK+ Decays