Wu-Yang Monopole with a Topological "Charge"

We present a generalization of the Wu–Yang monopole with a continuous topological “charge”. The latter can be considered as a massless topological excitation which realizes the Kogut–Susskind mechanism of solution of the U(1)–problem in QCD. PACS numbers: 11.15.-q, 12.38.Aw, 11.15.Tk ∗ Permanent address: Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72,Tzarigradsko Chaussee, 1784 Sofia, Bulgaria a E-mail address: soso@jinr.ru b E-mail address: ilieva@pap.univie.ac.at c E-mail address: lipartia@thsun1.jinr.ru d E-mail address: pervush@thsun1.jinr.ru