Amplitude analysis of B+ →j /ψφK+ decays

(LHCb Collaboration)

Research output: Contribution to journalArticle

54 Citations (Scopus)

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 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. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the K∗(1680)+→φK+ transition.

Original languageEnglish (US)
Article number012002
JournalPhysical Review D
Volume95
Issue number1
DOIs
StatePublished - Jan 11 2017

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standard deviation
decay
quantum numbers
collisions
detectors
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Amplitude analysis of B+ →j /ψφK+ decays. / (LHCb Collaboration).

In: Physical Review D, Vol. 95, No. 1, 012002, 11.01.2017.

Research output: Contribution to journalArticle

(LHCb Collaboration). / Amplitude analysis of B+ →j /ψφK+ decays. In: Physical Review D. 2017 ; Vol. 95, No. 1.
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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 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. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the K∗(1680)+→φK+ transition.",
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