Pinned Branes and New Non Lorentz Invariant Theories

TL;DR

This paper introduces a mechanism to localize branes using fluxes in specific geometries, leading to new gravity-decoupled theories that break Lorentz invariance and extend known string theory frameworks.

Contribution

It proposes a novel flux-based localization method for branes, resulting in new non-Lorentz-invariant theories with potential applications in high-energy physics.

Findings

Existence of a new 5+1D Lorentz-breaking theory.

Prediction of a new gravity-decoupled theory similar to little-string theory.

Demonstration of brane pinning via fluxes in Taub-NUT space.

Abstract

We describe a mechanism for localising branes in ambient space. When a 3-form flux is turned on in a Taub-NUT space, an M5-brane gets an effective potential that pins it to the center of the space. A similar effect occurs for M2-branes and D-branes with appropriate fluxes. In carefully chosen limits of the external parameters, this leads to new theories that are decoupled from gravity and appear to break Lorentz invariance. For example, we predict the existence of a new 5+1D theory that breaks Lorentz invariance at high-energy and has a low-energy description of N tensor multiplets with (1,0) supersymmetry. We also predict a new type of theory that, similarly to the little-string theory decouples from gravity by a dynamical (rather than kinematical) argument.