2024/04/25 by Adriano Cherchiglia, Cherchiglia, A. L., Alex G. Dias +5 · 1 citation
Engineering · #Fluid Dynamics and Turbulent Flows
paper · pdf · doi:10.48550/arxiv.2404.16945
We investigate how the solution to the strong CP problem and the explanation for the observed fermion mass hierarchies can be intrinsically related. Specifically, we explore the Nelson-Barr mechanism and identify its "seesaw limit", where light quark masses are suppressed by large CP-violating terms. Upon adding three (two) vector-like quarks that mix with the down-type (up-type) quark sector of the Standard Model, we demonstrate how the lack of CP violation in the strong sector and the observed quark mass hierarchy can be simultaneously achieved.