Are horned particles the end point of Hawking evaporation?

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Abstract
We investigate the proposal by Callan, Giddings, Harvey, and Strominger (CGHS) that two-dimensional quantum fluctuations can eliminate the singularities and horizons formed by matter collapsing on the nonsingular extremal black hole of dilaton gravity. We argue that this scenario could in principle resolve all of the paradoxes connected with Hawking evaporation of black holes. However, we show that the generic solution of the model of CGHS is singular. We propose modifications of their model which may allow the scenario to be realized in a consistent manner.

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