We show that the cosmological sphaleron of Einstein-Yang-Mills system can be
produced from real tunneling geometries. The sphaleron will tend to roll down
to the vacuum or pure gauge field configuration, when the universe evolves in
the Lorentzian signature region with the sphaleron and the corresponding
hypersurface being the initial data for the Yang-Mills field and the universe,
respectively. However, we can also show that the sphaleron, although unstable,
can be regarded as a pseudo-stable solution because its lifetime is even much
greater than those of the universe.Comment: 20 pages, LaTex, article 12pt style, TIT/HEP-242/COSMO-3