Amplitude analysis of B[superscript +] → J/ψϕK[superscript +] decays

• Main Authors: Boettcher, Thomas Julian (Contributor), Ilten, Philip J (Contributor), Williams, Michael (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society (APS), 2018-10-25T18:29:22Z.
• Subjects: Article
• Online Access: Get fulltext

The first full amplitude analysis of B[superscript +]→J/ψφK[superscript +] with J/ψ→μ[superscript +]μ[superscript -], φ→K[superscript +]K[superscript -] decays is performed with a data sample of 3 fb[superscript -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[superscript +], 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)[superscript +]→φK[superscript +] transition.
National Science Foundation (U.S.)