# Pair production of scalars around near-extremal Kerr-Sen black holes

## TL;DR

This paper studies the conditions under which charged scalar pairs are produced near the horizon of near-extremal Kerr-Sen black holes, linking it to violations of the Breitenlohner-Freedman bound in an AdS$_2$ space, and compares with similar phenomena in Kerr-Newman black holes.

## Contribution

It extends the analysis of scalar pair production to Kerr-Sen black holes, highlighting the role of the Breitenlohner-Freedman bound violation in this process.

## Key findings

- Pair production occurs when the Breitenlohner-Freedman bound is violated.
- The method applies to Kerr-Sen, Kerr-Newman, and non-rotating black holes.
- Results include the static limit case.

## Abstract

We investigate the charged scalar pair production near the horizon of a near-extremal Kerr-Sen black holes. The condition for pair production to occur has relation to the violation of Breitenlohner-Freedman bound in an AdS$_2$ space. The method employed in this work has been used to show the pair production in the near-horizon of a near-extremal Kerr-Newman black hole and its non-rotating case as well. We also discuss the static limit of our result.