Quark and lepton masses from renormalization-group fixed points
Abstract
The renormalization-group equations describing the evolution of fermion-Higgs-boson Yukawa coupling constants down from MX in a grand unified theory possess fixed points which may lead to universal predictions for fermion masses independent of symmetry considerations at MX. Our analysis predicts ~ 240 GeV for the fixed-pint t-quark mass. Alternatively, a sufficiently heavy fourth SU(5) generation cannot be ruled out by existing bounds on the number of fermion generations, nf, and we find fixed-point mass predictions of mT~219 GeV, mB~215 GeV, and mE~60 GeV.
- Publication:
-
Physical Review D
- Pub Date:
- August 1981
- DOI:
- Bibcode:
- 1981PhRvD..24..691H