The Rubakov-Callan Effect and Black Holes

TL;DR

This paper reexamines the Rubakov-Callan effect in the context of black holes, considering gravitational effects from heavy monopoles and large Higgs vacuum expectation values, revealing complex modifications to fermion condensates around magnetically charged black holes.

Contribution

It extends the original Rubakov-Callan effect analysis to curved spacetime with heavy monopoles and large Higgs VEVs, highlighting intricate modifications to fermion condensates near black holes.

Findings

Fermion condensate density around magnetically charged black holes is significantly modified.

The calculational scheme can be extended to curved backgrounds with heavy monopoles.

Gravitational effects influence the behavior of monopoles and associated fermion condensates.

Abstract

The Rubakov-Callan effect is reexamined by considering the gravitational effects caused by the heavy monopole mass. Assuming that the Higgs vacuum expectation value is as large as (or larger than) the Planck mass, we show that the calculational scheme of Rubakov and Callan may be extended in the presence of curved background field. It is argued that the density of the fermion condensate around a magnetically charged black hole is modified in an intricate way.