Twisted supergravity and untwisted super-bigravity

TL;DR

This paper develops new 5-dimensional supergravity models with branes, incorporating boundary condition twists and mass terms, resulting in models with unbroken N=1 supersymmetry suitable for realistic physics scenarios.

Contribution

It introduces novel brane/bulk supergravity models with boundary condition twists and brane mass terms, including a super-bigravity model with unbroken N=1 supersymmetry.

Findings

Constructed models with unbroken N=1 supersymmetry.

Developed a super-bigravity model with static vacuum.

Extended previous supersymmetrization analyses.

Abstract

We have extended previous analysis of the bulk/brane supersymmetrizations involving non-zero brane mass terms of bulk fermions (gravitini) and twisting of boundary conditions. We have constructed new brane/bulk models that may be relevant for realistic model building. In particular, we have built a model with the Randall-Sundrum bosonic sector, orthogonal projection operators on the branes in the fermionic sector, and an unbroken N=1 supersymmetry. We have also constructed 5d super-bigravity with static vacuum and unbroken N=1 supersymmetry, which may be viewed as a deconstruction of 5d supergravity.