A New Class of Four-Dimensional N=1 Supergravity with Non-minimal Derivative Couplings

TL;DR

This paper introduces a novel four-dimensional N=1 supergravity model that couples scalar kinetic terms to the Einstein tensor without causing problematic higher-derivative effects, using off-shell multiplets.

Contribution

It develops a new supergravity framework with non-minimal derivative couplings, expanding the class of consistent supergravity theories.

Findings

Coupling of scalar kinetic term to Einstein tensor achieved.

No harmful higher-derivative terms introduced.

Uses off-shell chiral and linear multiplets effectively.

Abstract

In the N=1 four-dimensional new-minimal supergravity framework, we supersymmetrise the coupling of the scalar kinetic term to the Einstein tensor. This coupling, although introduces a non-minimal derivative interaction of curvature to matter, it does not introduce harmful higher-derivatives. For this construction, we employ off-shell chiral and real linear multiplets. Physical scalars are accommodated in the chiral multiplet whereas curvature resides in a linear one.