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.
Titolo: | Observation of J/psi phi Structures Consistent with Exotic States from Amplitude Analysis of B+ -> J/psi phi K+ Decays | |
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Data di pubblicazione: | 2017 | |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.118.022003 | |
Handle: | http://hdl.handle.net/11384/66046 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |