Structure of Spinning Particle Suggested by Gravity, Supergravity and Low Energy String Theory

TL;DR

This paper explores the structure of spinning particles through solutions in gravity, supergravity, and string theory, highlighting features like vortex null congruences, singular rings, and stringy structures, with implications for experimental tests.

Contribution

It introduces a unified analysis of spinning particles using Kerr-Newman, super-Kerr-Newman, and Kerr-Sen solutions, revealing novel stringy and fermionic features.

Findings

Identification of vortex null congruence and singular ring in Kerr spinning particles

Prediction of heterotic string boundary on the Kerr disk

Existence of fermionic traveling waves near singularities

Abstract

The structure of spinning particle suggested by the rotating Kerr-Newman (black hole) solution, super-Kerr-Newman solution and the Kerr-Sen solution to low energy string theory is considered. Main peculiarities of the Kerr spinning particle are discussed: a vortex of twisting principal null congruence, singular ring and the Kerr source representing a rotating relativistic disk of the Compton size. A few stringy structures can be found in the real and complex Kerr geometry. Low-energy string theory predicts the existence of a heterotic string placed on the sharp boundary of this disk. The obtained recently supergeneralization of the Kerr-Newman solution suggests the existence of extra axial singular line and fermionic traveling waves concentrating near these singularities. We discuss briefly a possibility of experimental test of these predictions.