Pair production of black holes on cosmic strings

TL;DR

This paper investigates the theoretical process of black hole pair creation via cosmic string breaking, deriving an instanton solution and calculating the probability, which is found to be very low for strings relevant to galaxy formation.

Contribution

It introduces a new instanton-based method to analyze black hole pair creation on cosmic strings, providing quantitative probability estimates.

Findings

Probability of black hole pair creation is very low for galaxy formation strings.

Derived an instanton solution from the C metric describing the process.

Quantitative analysis of pair creation likelihood in cosmological contexts.

Abstract

We discuss the pair creation of black holes by the breaking of a cosmic string. We obtain an instanton describing this process from the $C$ metric, and calculate its probability. This is very low for the strings that have been suggested for galaxy formation.