  We suggest that the exchange fluctuations close to a Feshbach resonance in a
two-component Fermi gas can result in an effective p-wave attractive
interaction. On the BCS side of a Feshbach resonance, the magnitude of this
effective interaction is comparable to the s-wave interaction, therefore
leading to a possible spin-triplet superfluid in the range of temperatures of
actual experiments. We also show that the particle-hole exchange fluctuations
introduce an effective scattering length which does not diverge, as the
standard mean-field one does. Finally, using the effective interaction
quantities we are able to model the molecular binding energy on the BEC side of
the resonance.
