Confinement from a scalar-gluon coupling in gauge theory
Sektion Physik der Ludwig-Maximilians-Universität, Theresienstr. 37, D-80333 München, Germany
Received: 18 May 1998 / Published online: 26 August 1998
A model is introduced with a massive scalar coupling to the Yang-Mills term in four-dimensional gauge theory. It is shown that the resulting potential of colour sources consists of a short distance Coulomb interaction and a confining part dominating at large distances. Far away from the source the scalar vanishes while the potential diverges linearly. Up to an Nc-dependent factor of order 1 the tension parameter in the model is gmf, where m denotes the mass of the scalar and f is a coupling scale entering the scalar-gluon coupling.