  We report on the observation of dipolar splitting in 6Li p-wave Feshbach
resonances by highresolution atom-loss spectroscopy. The Feshbach resonances at
159 G and 215 G exhibit a doublet structure of 10 mG and 13 mG, respectively,
associated with different projections of the orbital angular momentum. The
observed splittings agree very well with coupled-channel calculations. We map
out the temperature dependence of the atom-loss spectrum allowing us to
extrapolate resonance positions and the corresponding widths to zero
temperature. The observed dipolar splitting in fermionic lithium might be
useful for the realization of the quantum phase transition between the polar
and axial p-wave superfluid phases.
