Wormholes without conserved charges

We construct an explicit finite-action wormhole solution for gravity coupled to a single real, massive scalar field. The resulting wormhole is interpreted to give the partial nucleation rate for baby universes in which the scalar field is prepared in a specific state. Since the partial rate for producing these specific baby universes provides a lower bound to the total nucleation rate, this total rate cannot be zero. This contradicts the conventional wisdom that a conserved global charge is a prerequisite for baby-universe nucleation, and undermines some proposed mechanisms for evading the large-wormhole catastrophe.