Possible quantum instability of primordial black holes - art. no. 061501

Evidence for the possible existence of a quantum process opposite to the fa mous Hawking radiation (evaporation) of black holes is presented. This new phenomenon could be very relevant in the case of exotic multiple horizon Na riai black holes and in the context of common grand unified theories. This is clearly manifested in the case of the SO(10) GUT, that is here investiga ted in detail. The remarkable result is obtained that anti-evaporation can occur there only in the SUSY version of the theory. It is thus concluded th at the existence of primordial black holes in the present Universe might be considered as evidence for supersymmetry. [S0556-2821(99)50104-5].