Brane Gravitational Interactions from 6D Supergravity

TL;DR

This paper analyzes how massive gravitons in a 6D supergravity brane world model influence 4D gravity, revealing that gravitational interactions can be independent of brane vacuum energy due to geometric and topological factors.

Contribution

It provides an analytical computation showing that graviton contributions to 4D gravity can be decoupled from brane vacuum energy in 6D supergravity models.

Findings

Massive graviton contributions can be independent of brane vacuum energy.

Geometrical and topological properties enable decoupling of gravity from vacuum energy.

Results support the idea of gravity-vacuum energy independence in such models.

Abstract

We investigate the massive graviton contributions to 4D gravity in a 6D brane world scenario, whose bulk field content can include that of 6D chiral gauged supergravity. We consider a general class of solutions having 3-branes, 4D Poincare symmetry and axisymmetry in the internal space. We show that these contributions, which we compute analytically, can be independent of the brane vacuum energy as a consequence of geometrical and topological properties of the above-mentioned codimension two brane world. These results support the idea that in such models the gravitational interactions may be decoupled from the brane vacuum energy.