P. Bracken, Classical Yang-Mills equations invariant under subgroups of the conformal group without coupling to matter, CAN J PHYS, 77(10), 1999, pp. 751-767
Classical Yang-Mills field equations on Minkowski space with gaugegroup SU(
2) are determined. Solutions invariant up to a gaugetransformation under a
four-dimensional subgroup of the conformalgroup are evaluated for the Yang-
Mills field in the absence ofmatter. Some properties of the solutions of th
e equations such astheir asymptotic behaviour are obtained.