Alternative Calculation of the Instanton Driven beta Function in Yang-Mills Theory

摘要

The more conventional way to estimate the instanton contribution to the beta function is proposed by considering leading radiative as well as semiclassical corrections to the gluon two- and three-point Green functions of Yang-Mills theory. The leading contribution to the renormalization of the coupling constant is determined within the dilute gas approximation. The corresponding beta function exhibits fast growth near g=1 and fits well there to beta (g) extrapolated from strong coupling lattice calculation. (Atomindex citation 13:642823)