SOLUTIONS FOR NEUTRAL AXI-DILATON GRAVITY IN 4-DIMENSIONS

We examine a one-parameter class of actions describing the gravitation al interaction between a pair of scalar fields and Einsteinian gravita tion. When the parameter is positive the theory corresponds to an axi- dilatonic sector of low-energy string theory. We exploit an SL(2, R) s ymmetry of the theory to construct a family of electromagnetically neu tral solutions with non-zero axion and dilaton charge from solutions o f the Brans-Dicke theory. We also comment on solutions to the theory w ith negative coupling parameter.