Jordan frame no-hair for spherical scalar-tensor black holes

Abstract

A no-hair theorem for spherical black holes in scalar-tensor gravity is presented. Contrary to the existing theorems, which are proved in the Einstein conformal frame, this proof is performed entirely in the Jordan frame. The theorem is limited to spherical symmetry (instead of axisymmetry) but holds for non-constant Brans-Dicke couplings.

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