Effective Field Theories and Cosmological Scattering Equations
Abstract
We propose worldsheet formulae for wavefunction coefficients of the massive non-linear sigma model (NLSM), scalar Dirac-Born-Infeld (DBI), and special Galileon (sGal) theories in de Sitter momentum space in terms of the recently proposed cosmological scattering equations constructed from conformal generators in the future boundary. The four-point integrands are assembled from simple building blocks and we identify a double copy prescription mapping the NLSM wavefunction coefficient to the DBI and sGal wavefunction coefficients, including mass deformations and curvature corrections. Finally, we compute the soft limits of these wavefunction coefficients and find that they can be written in terms of boundary conformal generators acting on contact diagrams.
Keywords
Cite
@article{arxiv.2204.08931,
title = {Effective Field Theories and Cosmological Scattering Equations},
author = {Connor Armstrong and Humberto Gomez and Renann Lipinski Jusinskas and Arthur Lipstein and Jiajie Mei},
journal= {arXiv preprint arXiv:2204.08931},
year = {2022}
}
Comments
v2. minor changes, published in JHEP