Massless Black Holes as Black Diholes and Quadruholes

TL;DR

This paper explores the theoretical concept of massless black holes as bound states of positive and negative mass objects, emphasizing the role of supersymmetry in their stability and existence.

Contribution

It introduces the idea that massless black holes can be modeled as bound states involving negative mass objects, highlighting supersymmetry's role in their stability.

Findings

Massless black holes can be formed as bound states with negative mass objects.

Supersymmetry ensures the stability and non-movement of these bound states.

Negative mass objects are permissible within supersymmetric frameworks when in bound states.

Abstract

Massless black holes can be understood as bound states of a (positive mass) extreme a=\sqrt{3} black hole and a singular object with opposite (i.e. negative) mass with vanishing ADM (total) mass but non-vanishing gravitational field. Supersymmetric balance of forces is crucial for the existence of this kind of bound states and explains why the system does not move at the speed of light. We also explain how supersymmetry allows for negative mass as long as it is never isolated but in bound states of total non-negative mass.