Charged stringlike solutions of low-energy heterotic string theory

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Abstract
Two stringlike solutions to the equations of motion of the low-energy effective action for the heterotic string are found, each a source of electric and magnetic fields. The first carries an electric current equal to the electric charge per unit length and is the most general solution which preserves one-half of the supersymmetries. The second is the most general charged solution with an event horizon, a ‘‘black string.’’ The relationship of the solutions to fundamental, macroscopic heterotic strings is discussed, and in particular it is shown that any stable state of such a fundamental string also preserves one-half of the supersymmetries, in the same manner as the first solution.
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