Fermion Masses and the UV Cutoff of the Minimal Realistic SU(5)

Details Fermion Masses and the UV Cutoff of the Minimal Realistic SU(5) Fermion Masses and the UV Cutoff of the Minimal Realistic SU(5)

2006-07-19

arxiv.org/abs/hep-ph/0607208v3

Phys.Rev.D75:125007,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures, minor corrections; version to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.75.125007

We investigate the predictions for fermion masses in the minimal realistic non-supersymmetric SU(5) model with the Standard Model matter content. The possibility to achieve b-\tau unification is studied taking into account all relevant effects. In addition, we show how to establish an upper bound on the ultraviolet cutoff \Lambda of the theory which is compatible with the Yukawa couplings at the grand unified scale and proton decay. We find \Lambda \simeq 10^{17} GeV, to be considered a conservative upper bound on the cutoff. We also provide up-to-date values of all the fermions masses at the electroweak scale.

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