Non-Relativistic Closed String Theory

TL;DR

This paper introduces a non-relativistic, Galilean invariant closed string theory derived from conventional string theories, exploring its properties, perturbative behavior, and dualities in a non-gravitational, high-energy context.

Contribution

It constructs a novel non-relativistic string theory with a consistent perturbative framework and explores its dualities and high-energy behavior, extending string theory into a non-relativistic regime.

Findings

Finite first order worldsheet Hamiltonian derived.

String theory exhibits a Hagedorn transition.

Dualities analogous to M theory are established.

Abstract

We construct a Galilean invariant non-gravitational closed string theory whose excitations satisfy a non-relativistic dispersion relation. This theory can be obtained by taking a consistent low energy limit of any of the conventional string theories, including the heterotic string. We give a finite first order worldsheet Hamiltonian for this theory and show that this string theory has a sensible perturbative expansion, interesting high energy behavior of scattering amplitudes and a Hagedorn transition of the thermal ensemble. The strong coupling duals of the Galilean superstring theories are considered and are shown to be described by an eleven-dimensional Galilean invariant theory of light membrane fluctuations. A new class of Galilean invariant non-gravitational theories of light-brane excitations are obtained. We exhibit dual formulations of the strong coupling limits of these Galilean invariant theories and show that they exhibit many of the conventional dualities of M theory in a non-relativistic setting.