Grand unification of flavor mixings

The origin of flavor mixings in the quark and lepton sectors is still a mystery, and the structure of flavor mixings in the lepton sector seems completely different from that of the quark sector. In this letter, we point out that the flavor mixing angles in the quark and lepton sectors could be unified at a high-energy scale, when neutrinos are degenerate. It means that a minimal flavor violation at a high-energy scale can induce a rich variety of flavor mixings in the quark and lepton sectors at a low-energy scale through quantum corrections