A Low Scale for Quark-Lepton Unification
The measured fermion masses may be pointing to the scale of quark-lepton unification. Studying the renormalization-group evolution of the Standard Model Yukawa couplings, we find that $y_\tau=y_b$ and $y_\mu=3y_s$ occur at nearly the same scale, around $10^6$ GeV, while the first generation reaches the Georgi-Jarlskog...