MASS INFLATION AND CHAOTIC BEHAVIOR INSIDE HAIRY BLACK-HOLES

We analyze the interior geometry of static, spherically symmetric blac k holes of the Einstein-Yang-Mills-Higgs theory. Generically the solut ions exhibit a behaviour that may be described as ''mass inflation'', although with a remarkable difference between the cases with and witho ut a Higgs field. Without Higgs field the YM field induces a kind of c yclic behaviour leading to repeated cycles of mass inflation - taking the form of violent explosions - interrupted by quiescent periods and subsequent approaches to an almost Cauchy horizon. With the Higgs fiel d no such cycles occur in the asymptotic behaviour. In addition there are non-generic families with a Schwarzschild and a Reissner-Nordstrom type singularity at r = 0, respectively. (C) 1998 Published by Elsevi er Science B.V.