On rational sliceness of Miyazaki's fibered, −amphicheiral knots

We prove that fibered, -amphicheiral knots with irreducible Alexander polynomials are rationally slice. This contrasts with the result of Miyazaki that (2n, 1)-cables of these knots are not ribbon. We also show that the concordance invariants ν⁺ and ϒ from Heegaard Floer homology vanish for a class of knots that includes rationally slice knots. In particular, the ν⁺- and ϒ-invariants vanish for these cable knots.