Effective field theories and cosmological scattering equations

0562174 - FZÚ 2023 RIV US eng J - Journal Article
Armstrong, C. - Gomez, H. - Lipinski Jusinskas, Renann - Lipstein, A. - Mei, J.
Effective field theories and cosmological scattering equations.
Journal of High Energy Physics. Roč. 8, Aug. (2022), č. článku 54. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA ČR GJ19-06342Y
Institutional support: RVO:68378271
Keywords : scattering equations * effective field theories * de Sitter
OECD category: Particles and field physics
Impact factor: 5.4, year: 2022
Method of publishing: Open access

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.
Permanent Link: https://hdl.handle.net/11104/0334588