Fine-tuning the low-energy physics

In this letter we discuss the problem of the extreme fine-tuning necessary to achieve the quark mass scale m(t) within the dynamical symmetry breaking of the phenomenological <t(t)over bar> condensate model. Inspired by the v ector-like phenomenon of chiral gauge theories at short distances, we postu late that the W+/--gauge bosons possess a vector-like gauge coupling and co ntribute to the gap-equations of quark self-energy functions in the high-en ergy region. We find that the gap-equations of different charge sectors are coupled, and as a result the unnatural fine-tuning is overcome and the rat io of the top and bottom masses is related to the electric charge: (m(b)/m( t))(2) similar or equal to alpha/3 pi, provided the quadratic divergence is removed by setting the four-fermion coupling G = 4 + o(m(b)(2)/m(t)(2)).