Classical moduli $O(\alpha')$ hair

TL;DR

This paper extends black hole solutions in String Gravity to include moduli fields, calculating their external hair and axions at order alpha' in a Kerr-Newman background.

Contribution

It introduces the computation of moduli and axion hair at order alpha' in the superstring effective action for rotating charged black holes.

Findings

Computed external moduli and dilaton hair at O(alpha')

Analyzed axion hair in Kerr-Newman black holes

Extended solutions to include moduli fields in String Gravity

Abstract

We extend existing treatments of black hole solutions in String Gravity to include moduli fields. We compute the external moduli and dilaton hair, as well as of their associated axions,to $O(\alpha')$ in the framework of the loop corrected superstring effective action for a Kerr-Newman black hole background.