# Non-Lorentzian M5-brane Theories from Holography

## TL;DR

This paper explores a novel holographic description of M5-brane theories involving a non-Lorentzian limit, leading to an $ ext{(2,0)}$ theory with enhanced supersymmetry derived from a timelike Hopf fibration in M-theory.

## Contribution

It introduces a new non-Lorentzian M5-brane theory from holography, constructed via a timelike Hopf fibration and RG flow, with an explicit fixed point exhibiting enhanced supersymmetry.

## Key findings

- Constructed a fixed point action with 24 supercharges.
- Derived the $ ext{(2,0)}$ theory from a null reduction.
- Connected the non-Lorentzian theory to flat space M5-branes.

## Abstract

M-theory on $AdS_7 \times S^4$ admits a description where the $AdS_7$ factor is constructed as a timelike Hopf fibration over a non-compact three dimensional complex projective space $\tilde{\mathbb{CP}}^3$. We consider the worldvolume theory for M5-branes at a fixed $\tilde{\mathbb{CP}}^3$ radius which, after reduction along the timelike fibre, is given by an $\Omega$-deformed Yang-Mills theory with eight supercharges. Taking the radius to infinity then induces a classical RG flow. We construct the fixed point action which has an enhanced 24 supercharges and which can be understood as the $(2,0)$ theory of M5-branes on flat space reduced along a compact null Killing direction.