The first full amplitude analysis of B^+→J/ψϕK^+ with J/ψ→μ^+μ^-, ϕ→K^+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 ϕK^+, and four J/ψϕ 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.
Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B^+→J/ψϕK^+ Decays
Veltri, M;
2017
Abstract
The first full amplitude analysis of B^+→J/ψϕK^+ with J/ψ→μ^+μ^-, ϕ→K^+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 ϕK^+, and four J/ψϕ 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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
