Black Holes in Supergravity: the non-BPS Branch

TL;DR

This paper constructs and analyzes non-BPS extremal black hole solutions in 4D supergravity, revealing their mass properties and stability characteristics across moduli space.

Contribution

It provides explicit non-BPS black hole solutions and characterizes their mass and stability features in supergravity.

Findings

Non-BPS black holes have a mass equal to a marginal bound state of four constituents.

A non-zero gap exists above the BPS bound for these solutions.

The mass remains consistent throughout the moduli space.

Abstract

We construct extremal, spherically symmetric black hole solutions to 4D supergravity with charge assignments that preclude BPS-saturation. In particular, we determine the ground state energy as a function of charges and moduli. We find that the mass of the non-BPS black hole remains that of a marginal bound state of four basic constituents throughout the entire moduli space and that there is always a non-zero gap above the BPS bound.