Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-12-16
Physics
High Energy Physics
High Energy Physics - Theory
Based on talks given at MRST 94, McGill University and at Mini-workshop on Extended Objects, Newton Institute, March 1994, 4 p
Scientific paper
We present two-parameter solutions of the low-energy four-dimensional heterotic string which in the extremal limit reduce to supersymmetric monopole, string and domain wall solutions. The effective scalar coupling to the Maxwell field, $e^{-\alpha \phi} F_{\mu\nu} F^{\mu\nu}$, gives rise to a new string black hole with $\alpha = \sqrt{3}$, in contrast to the pure dilaton black hole solution which has $\alpha=1$. Implications of string/fivebrane duality in $D=10$ to four-dimensional dualities are discussed.
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