Double-copy towards supergravity inflation with α-attractor models

Journal of High Energy Physics

Regular Article - Theoretical Physics

Nicolas H. Pavao¹  John Joseph M. Carrasco¹  Matthew Lewandowski² 

[1] Department of Physics and Astronomy, Northwestern University, 60208, Evanston, Illinois, USA;Department of Physics and Astronomy, Northwestern University, 60208, Evanston, Illinois, USA;Institut fur Theoretische Physik, ETH Zurich, 8093, Zurich, Switzerland;

关键词: Scattering Amplitudes;    Cosmological models;    Effective Field Theories;    Supergravity Models;   

DOI  :  10.1007/JHEP02(2023)015

 received in 2022-11-26, accepted in 2023-01-10,  发布年份 2023

来源: Springer

【 摘 要 】

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(F3) 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.

【 授权许可】

Unknown   
© The Author(s) 2023