Effective action and Hawking radiation for dilaton coupled scalars in two dimensions

Details Effective action and Hawking radiation for dilaton coupled scalars in two dimensions Effective action and Hawking radiation for dilaton coupled scalars in two dimensions

1998-11-10

arxiv.org/abs/hep-th/9811092v3

Phys.Rev. D60 (1999) 084021

Physics

High Energy Physics

High Energy Physics - Theory

latex, no figures, no macros, clarifying remarks on the effective action approach are added

Scientific paper

10.1103/PhysRevD.60.084021

The effective one-loop action for general dilaton theories with arbitrary dilaton-dependent measure and nonminimal coupling to scalar matter is computed. As an application we determine the Hawking flux to infinity from black holes in d-dimensions. We resolve the recently resurrected problem of an apparent negative flux for nonminimally coupled scalars: For any $D \geq 4$ Black Hole the complete flux turns out to be precisely the one of minimal coupling. This result is obtained from a Christensen-Fulling type argument involving the (non-)conservation of energy-momentum. It is compared with approaches using the effective action.

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