TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - Observation of J/psi phi Structures Consistent with Exotic States from Amplitude Analysis of B+ -> J/psi phi K+ Decays
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 022003
EP  - 10pp
VL  - 118
IS  - 2
PB  - Amer Physical Soc
AB  - 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.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1606.07895
UR  - https://doi.org/10.1103/PhysRevLett.118.022003
DO  - 10.1103/PhysRevLett.118.022003
LA  - English
N1  - WOS:000391926900004
ID  - LHCbCollaborationAaij_etal2017
ER  -