An interacting conformal chiral 2-form electrodynamics in six dimensions

TL;DR

This paper explores a novel conformal chiral 2-form electrodynamics in six dimensions derived from M5-brane physics, highlighting its gauge invariance, null fluid stress tensor, and connections to tensionless branes and AdS/CFT.

Contribution

It introduces a new interacting conformal 2-form theory with gauge invariance and no adjustable coupling, derived from strong-field M5-brane limits, and discusses its Lorentz invariance realization.

Findings

The theory has gauge-invariant self-interactions.

The stress tensor describes a null fluid.

Lorentz invariance can be realized via brane interpretations.

Abstract

The strong-field limit for the 2-form potential on an M5-brane yields a conformal chiral 2-form electrodynamics in six dimensions, with gauge-invariant self-interactions but no adjustable coupling constant; the stress tensor is that of a null fluid. Lorentz invariance can be made manifest via an interpretation as a tensionless `space-filling M5-brane', or as a truncation of the infra-red dynamics of an M5-brane in AdS7 x S4.