Bridge Between Weak and Strong Coupling Regions: BRS Symmetries as a Guiding Principle

摘要

By imposing extended BRS symmetries on the Yang-Mills Lagrangian, we obtained two types of BRS invariant Lagrangians, i.e. Lagrangians of the non-gauge type and the gauge type. A Lagrangian of the non-gauge type, which was previously obtained by us, can yield the linearly rising potential between a quark and anti-quark pair at the one-loop level. By smoothly relating the running coupling constant in the confining region to that in the asymptotically free region, we deduce a relationship between the string tensions and lambda /sub QCD/, which shows good agreement with experiments. (author). 20 refs, 1 fig. (Atomindex citation 19:037367)