Non-Abelian Cornucopions
E. E. Donets, D. V. Gal'tsov, M. S. Volkov
Abstract
An infinite family of cornucopions is found within the SU(2)× U(1) sector of the 4--d heterotic string low-energy theory, the extremal U(1) magnetic dilatonic black hole being the lowest energy state. Non-abelian cornucopions are interpreted as sphalerons associated with potential barriers separating topologically distinct Yang-Mills vacua on the U(1) cornucopion background. A mass formula for non-abelian dilatonic black holes is derived, and the free energy is calculated through the Euclidean action.
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