The cosmological evolution of standard model Yukawa couplings may have major
implications for baryogenesis. In particular, as highlighted recently, the CKM
matrix alone could be the source of CP-violation during electroweak
baryogenesis provided that the Yukawa couplings were large and varied during
the electroweak phase transition. We provide a natural realisation of this idea
in the context of Randall-Sundrum models and show that the geometrical warped
approach to the fermion mass hierarchy may naturally display the desired
cosmological dynamics. The key ingredient is the coupling of the
Goldberger-Wise scalar, responsible for the IR brane stabilisation, to the bulk
fermions, which modifies the fermionic profiles. This also helps alleviating
the usually tight constraints from CP-violation in Randall-Sundrum scenarios.
We study how the Yukawa couplings vary during the stabilisation of the
Randall-Sundrum geometry and can thus induce large CP-violation during the
electroweak phase transition. Using holography, we discuss the 4D
interpretation of this dynamical interplay between flavour and electroweak
symmetry breaking.Comment: 42 pages, 19 figure