出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The SU(3) gauge theory with fermions in the sextet representation is one of several theories of
interest for technicolor models. We have carried out a Schrodinger functional (SF) calculation
for the lattice theory with two flavors of Wilson fermions. We find that the discrete beta function
changes sign when the SF renormalized coupling is in the neighborhood of g2 = 2.0, showing a
breakdown of the perturbative picture even though the coupling is weak. Themost straightforward
interpretation is an infrared-stable fixed point.
