Observation of J/ψÏ Structures Consistent with Exotic States from Amplitude Analysis of B
Phys Rev Lett
; 118(2): 022003, 2017 Jan 13.
Article
en En
| MEDLINE
| ID: mdl-28128595
ABSTRACT
The first full amplitude analysis of B^{+}âJ/ψÏK^{+} with J/ψâµ^{+}µ^{-}, ÏâK^{+}K^{-} decays is performed with a data sample of 3 fb^{-1} of pp collision data collected at sqrt[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 ÏK^{+}, and four J/ψÏ 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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MEDLINE
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En
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Phys Rev Lett
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2017
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Article
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Suiza