  We report on the realization of an ultracold mixture of lithium atoms in the
ground state and ytterbium atoms in the excited metastable 3P2 state. Such a
mixture can support broad magnetic Feshbach resonances which may be utilized
for the production of ultracold molecules with an electronic spin degree of
freedom, as well as novel Efimov trimers. We investigate the interaction
properties of the mixture in the presence of an external magnetic field and
find an upper limit for the background interspecies two-body inelastic decay
coefficient of K'2 < 3e-12 cm^3/s for the 3P2 m_J=-1 substate. We calculate the
dynamic polarizabilities of the Yb 3P2 magnetic substates for a range of
wavelengths, and find good agreement with our measurements at 1064nm. Our
calculations also allow the identification of magic frequencies where Yb ground
and metastable states are identically trapped and the determination of the
interspecies van der Waals coefficients.
