Abstract
The first full amplitude analysis of with , decays is performed with a data sample of of collision data collected at and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into , and four 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 state. The model includes significant contributions from a number of expected kaon excitations, including the first observation of the transition.
19 More- Received 25 June 2016
DOI:https://doi.org/10.1103/PhysRevD.95.012002
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
© 2017 CERN, for the LHCb Collaboration