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oai:recercat.cat:2445/123592025-12-04T20:42:56Zcom_2072_1057col_2072_478822col_2072_478917

00925njm 22002777a 4500 dc Emparan García de Salazar, Roberto A. author 2010-05-06T09:11:45Z 2010-05-06T09:11:45Z 1995 An analysis of cosmic string breaking with the formation of black holes attached to the ends reveals a remarkable feature: the black holes can be correlated or uncorrelated. We find that, as a consequence, the number-of-states enhancement factor in the action governing the formation of uncorrelated black holes is twice the one for a correlated pair. We argue that when an uncorrelated pair forms at the ends of the string, the physics involved is more analogous to thermal nucleation than to particle-antiparticle creation. Also, we analyze the process of intercommuting strings induced by black hole annihilation and merging. Finally, we discuss the consequences for grand unified strings. The process whereby uncorrelated black holes are formed yields a rate which significantly improves over those previously considered, but still not enough to modify string cosmology. 1995 The American Physical Society. Teoria de camps (Física) Partícules (Física) Forats negres (Astronomia) Cordes còsmiques Field theory (Physics) Black holes (Astronomy) Cosmic strings Correlations between black holes formed in cosmic string breaking