Journal Article

Double-copy towards supergravity inflation with α-attractor models

Pavao, Nicolas H., Carrasco, John Joseph M., Lewandowski, Matthew

2023

Overview

A bstract Key to the simplicity of supergravity α -attractor models of inflation are Volkov-Akulov fermions, often in the form of nilpotent superfields. Here we explore the possibility of using the double-copy to construct theories of Dirac-Born-Infeld-Volkov-Akulov (DBIVA) coupled to supergravity. A color-dual bootstrap admits scattering amplitudes involving pions and vectors through five-point tree-level order by order in mass-dimension, but requires the introduction of a Tr( F 3 ) operator. Gauge theories with this operator were recently found to require a tower of higher-derivative operators to be compatible with the duality between color and kinematics. Adjoint-type double-copy construction at its most conservative seems to require the UV completion of DBIVA + pure Poincaré supergravity scattering amplitudes to a family of theories involving DBIVA-like particles coupled to Weyl-Einstein supergravity. We also point out an alternative solution to color-dual gauged pions that allows adjoint double-copy without a tower of higher derivative corrections but at the cost of exchange symmetry between scalars.

• Publisher: Springer Berlin Heidelberg,Springer Nature B.V,Springer Nature,SpringerOpen
• Subject: Amplitudes / Classical and Quantum Gravitation / Color / Construction / Cosmological models / Effective Field Theories / Elementary Particles / Fermions / Gauge theory / Gravity / High energy physics / Kinematics / Operators (mathematics) / Physics / Physics and Astronomy / Pions / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Regular Article - Theoretical Physics / Relativity Theory / Scalars / Scattering / Scattering Amplitudes / Spacetime / String Theory / Supergravity / Supergravity Models / Symmetry