Higher-spins on Taub-NUT and higher-spin Taub-NUT

TL;DR

This paper develops higher-spin extensions of self-dual Yang-Mills and gravity, constructs solutions on Taub-NUT backgrounds, and explores their algebraic structure, advancing understanding of higher-spin theories in gravitational instanton backgrounds.

Contribution

It introduces higher-spin solutions on Taub-NUT backgrounds and identifies a non-associative algebra governing their perturbation theory.

Findings

Higher-spin fields propagate on gravitational instantons.

Exact solutions of HS-SDYM on Taub-NUT are constructed.

A non-associative algebra governs higher-spin perturbations.

Abstract

We consider higher-spin extensions of self-dual Yang-Mills (HS-SDYM) and self-dual Gravity (HS-SDGR), which are also truncations of chiral higher-spin gravity. Higher-spin fields can consistently propagate on gravitational instantons and we construct solutions to the higher-spin equations on the Taub-NUT background. We show that these solutions remain exact solutions of HS-SDYM. For HS-SDGR the perturbation theory converges for any given spin to give a higher-spin generalization of Taub-NUT and we identify a commutative non-associative algebra that governs the structure of the perturbation theory.