Massive Gravity on a Non-extremal Brane

TL;DR

This paper explores massive gravity in a non-extremal brane setup, revealing a quasi-localized graviton mode with Lorentz invariance breaking, and suggests a duality relation between different brane backgrounds persists beyond extremality.

Contribution

It demonstrates the existence of a quasi-localized massive graviton in non-extremal brane backgrounds and provides evidence for duality relations beyond extremality.

Findings

Presence of a quasi-localized massive graviton mode.

Lorentz invariance is slightly broken, affecting graviton leakage.

Similar graviton dynamics in D5 and M5/M5-brane backgrounds.

Abstract

We consider a brane world scenario which arises as the near-horizon region of a non-extremal D5-brane. There is a quasi-localized massive graviton mode, as well as harmonic modes of higher mass which are bound to the brane to a lesser degree. Lorentz invariance is slightly broken, which may have observable effects due to the leakage of the metastable graviton states into the bulk. Unlike a brane world arising from an extremal D5-brane, there is no mass gap. We also find that a brane world arising from a non-extremal M5/M5-brane intersection has the same graviton dynamics as that of a non-extremal D5-brane. This is evidence that a previously conjectured duality relation between the dual quantum field theories of each p-brane background may hold away from extremality.