Graviballs and Dark Matter

TL;DR

This paper explores the theoretical possibility of graviballs, bound states of gravitons, as dark matter candidates, using quantum gravity techniques and numerical simulations to analyze their formation and gravitational effects.

Contribution

It introduces the concept of graviballs as bound graviton systems and demonstrates their potential viability as dark matter through numerical analysis and gravitational lensing calculations.

Findings

Gravitons can form bound states called graviballs via gravitational interaction.

Numerical solutions show the space-time dynamics of graviball formation.

Graviballs could serve as a viable dark matter candidate with detectable gravitational lensing effects.

Abstract

We investigate the possible existence of graviballs, a system of bound gravitons, and show that two gravitons can be bound together by their gravitational interaction. This idea connects to black hole formation by a high-energy $2\to N$ scattering and to the gravitational geon studied by Brill and Hartle. Our calculations rely on the formalism and techniques of quantum field theory, specifically on low-energy quantum gravity. By solving numerically the relativistic equations of motion, we have access to the space-time dynamics of the (2-gravitons) graviball formation. We argue that the graviball is a viable dark matter candidate and we compute the associated gravitational lensing.