Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B^{+}→J/ψϕK^{+} Decays.

نویسندگان

  • R Aaij
  • B Adeva
  • M Adinolfi
  • Z Ajaltouni
  • S Akar
  • J Albrecht
  • F Alessio
  • M Alexander
  • S Ali
  • G Alkhazov
  • P Alvarez Cartelle
  • A A Alves
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  • S Amerio
  • Y Amhis
  • L An
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  • O Aquines Gutierrez
  • F Archilli
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  • J Arnau Romeu
  • A Artamonov
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  • J Benton
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چکیده

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.

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عنوان ژورنال:
  • Physical review letters

دوره 118 2  شماره 

صفحات  -

تاریخ انتشار 2017