  The Y(4140) observed by CDF appears to have a novel explanation. Its mass and
width coincide within experimental error with a two-step process. In the first
step, Y(4140) -> D_sbar + pi + D_s where the pion is virtual. A loop diagram
involving this virtual pion allows Y(4140) de-excitation to J/psi + phi. Its
predicted spin-parity is JPC = 1++. The same mechanism for Dbar-D^*
configurations predicts a similar structure at 3911-3918 MeV, consistent with
the peak at 3915 +- 3 MeV observed in omega J/psi by Babar and Belle. Relative
branching ratios observed for B+ -> phi J/psi K+ and B+ -> omega J/psi K+
require that this mechanism accelerates decays of Y(4140) by a factor ~ 10^4
compared with isospin-violating decays via Y(4140) -> D_sbar + D^*_s. Similar
processes are well known in molecular chemistry.
