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Effective field theories and cosmological scattering equations

Armstrong, C.; Gomez, H.; Jusinskas, R. Lipinski; Lipstein, A.; Mei, J.

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H. Gomez

R. Lipinski Jusinskas


We propose worldsheet formulae for correlators 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 constructed from simple building blocks and we propose a generalised double copy which maps the NLSM correlator to the DBI and sGal correlators, including mass deformations and curvature corrections. Finally, we compute the soft limits of these correlators and find that they can also be written in terms of boundary conformal generators acting on contact diagrams.


Armstrong, C., Gomez, H., Jusinskas, R. L., Lipstein, A., & Mei, J. (2022). Effective field theories and cosmological scattering equations. Journal of High Energy Physics, 2022(8), Article 54.

Journal Article Type Article
Acceptance Date Jun 23, 2022
Online Publication Date Aug 3, 2022
Publication Date 2022
Deposit Date Aug 7, 2022
Publicly Available Date Aug 8, 2022
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2022
Issue 8
Article Number 54
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Published Journal Article (749 Kb)

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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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