  We study the competition between a Pomeranchuk instability in the spin
channel with angular momentum $\ell=1$ and an attractive interaction, favoring
Cooper-pair formation. We found that the superconducting gap strongly
suppresses the phase space for the Pomeranchuk instability. We computed a
mean-field phase diagram displaying a first order transition between two
superconductor phases with different symmetries: p-wave (with spontaneously
generated spin-orbit interaction) and s-wave for greater values of the coupling
constant. Moreover, we have looked for a possible modulated superconducting
phase. We have found that this phase appears only as a meta-stable state in the
strong coupling regime.
