Massless black hole pairs in string theory

TL;DR

This paper studies massless black hole pairs in string theory, presenting a solution for their pair creation and analyzing the instanton-mediated production rate, with implications for understanding naked singularities.

Contribution

It introduces a new classical solution describing massless black hole pairs in motion and explores their quantum pair production via an instanton in string theory.

Findings

Found a classical solution for oppositely charged massless black holes in acceleration.

Derived an instanton mediating pair production in Minkowski space.

Analyzed the creation rate and discussed theoretical implications.

Abstract

We analyze the zero mass black holes that arise as classical solutions to low energy heterotic string theory. Though these solutions contain naked singularities, it has been conjectured that they should be allowed in the theory. We find a solution describing a pair of oppositely charged massless black holes in uniformly accelerated motion under no external force. By analytically continuing the solution to Euclidean time, we find an instanton mediating the pair production of these objects in Minkowski space. We analyze the creation rate, and discuss some consequences of the result.