Fermion mass hierarchy and the strong CP problem
Journal
Physics Letters B
Journal Volume
219
Journal Issue
2-3
Pages
342-346
Date Issued
1989
Author(s)
Babu, K.S.
Abstract
We present a model which resolves the strong CP problem by the Peccei-Quinn (PQ) mechanism and at the same time provides a natural explanation to the fermion mass hierarchy. Only the third generation quarks acquire masses at the tree level due to the PQ symmetry present in the model; the second and first generation quark masses arise as one-loop and two-loop radiative corrections, respectively. The coupling of the axion in the model to the second and third generation quarks is three to four orders of magnitude larger than in conventional invisible axion models. © 1989.
Type
journal article