Warped brane world supergravity, flipping, and the Scherk-Schwarz mechanism

TL;DR

This paper explores the connection between the Scherk-Schwarz mechanism and flipped brane-world supergravity models in five dimensions, analyzing how supersymmetry breaking terms relate to the effective four-dimensional cosmological constant.

Contribution

It clarifies the relationship between Scherk-Schwarz supersymmetry breaking and flipped supergravity models, including the form of supersymmetry-violating terms in various supergravity setups.

Findings

Scherk-Schwarz terms are linked to the 4D cosmological constant scale.

Mass terms from Scherk-Schwarz redefinition are of order inverse radius.

Effective 4D masses are governed by the scale rac{rac{rac{rac{ar{\

Abstract

We demonstrate the relation between the Scherk-Schwarz mechanism and flipped gauged brane-bulk supergravities in five dimensions. We discuss the form of supersymmetry violating Scherk-Schwarz terms in pure supergravity and in supergravity coupled to matter. Although the Lagrangian mass terms that arise as the result of the Scherk-Schwarz redefinition of fields are naturally of the order of the inverse radius of the orbifold, the effective 4d physical mass terms are rather set by the scale \sqrt{|\bar{\Lambda}|}, where \bar{\Lambda} is the 4d cosmlogical constant.