Interpreting the X (5568)
T.J. Burns (Department of Physics, Swansea University, Singleton Park, Swansea, SA2 8PP, UK)
; E.S. Swanson (Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260, USA)
A variety of options for interpreting the DØ state, X(5568) , are examined. We find that threshold, cusp, molecular, and tetraquark models are all unfavoured. Several experimental tests for unravelling the nature of the signal are suggested.
