%0 Journal Article %T Observation of J/psi phi Structures Consistent with Exotic States from Amplitude Analysis of B+ -> J/psi phi K+ Decays %A LHCb Collaboration (Aaij, R. et al %A Martinez-Vidal, F. %A Oyanguren, A. %A Remon Alepuz, C. %A Ruiz Valls, P. %A Sanchez Mayordomo, C. %J Physical Review Letters %D 2017 %V 118 %N 2 %I Amer Physical Soc %@ 0031-9007 %G English %F LHCbCollaborationAaij_etal2017 %O WOS:000391926900004 %O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2946), last updated on Thu, 23 Feb 2017 09:10:09 +0000 %X 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. %R 10.1103/PhysRevLett.118.022003 %U http://arxiv.org/abs/1606.07895 %U https://doi.org/10.1103/PhysRevLett.118.022003 %P 022003-10pp