Emparan García de Salazar, Roberto A.2010-07-052010-07-0519950031-9007https://hdl.handle.net/2445/13244We argue that production of charged black hole pairs joined by a cosmic string in the presence of a magnetic field can be analyzed using the Ernst metric. The effect of the cosmic string is to pull the black holes towards each other, opposing to the background field. An estimation of the production rate using the Euclidean action shows that the process is suppressed as compared to the formation of black holes without strings.4 p.application/pdfeng(c) American Physical Society, 1995Relativitat (Física)Gravitació (Física)Teoria de camps (Física)Partícules (Física)EstelsGeneral relativity and gravitationGeneral theory of fields and particlesStarsinfo:eu-repo/semantics/article510687info:eu-repo/semantics/openAccess