Abstract
Decays of and mesons into final states, produced in collisions at the LHC, are investigated using data corresponding to an integrated luminosity of collected with the LHCb detector. decays are seen for the first time, and the branching fractions are measured. Using these rates, the mixing angle between strange and nonstrange components of its wave function in the structure model is determined to be . Implications on the possible tetraquark nature of the are discussed.
- Received 8 October 2013
DOI:https://doi.org/10.1103/PhysRevLett.112.091802
This article is available 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.
© 2014 CERN, for the LHCb Collaboration