Partially massless fields during inflation
From MaRDI portal
Publication:1641816
DOI10.1007/JHEP04(2018)140zbMATH Open1390.83435arXiv1712.06624OpenAlexW2778661238WikidataQ129905980 ScholiaQ129905980MaRDI QIDQ1641816
Author name not available (Why is that?)
Publication date: 19 June 2018
Published in: (Search for Journal in Brave)
Abstract: The representation theory of de Sitter space allows for a category of partially massless particles which have no flat space analog, but could have existed during inflation. We study the couplings of these exotic particles to inflationary perturbations and determine the resulting signatures in cosmological correlators. When inflationary perturbations interact through the exchange of these fields, their correlation functions inherit scalings that cannot be mimicked by extra massive fields. We discuss in detail the squeezed limit of the tensor-scalar-scalar bispectrum, and show that certain partially massless fields can violate the tensor consistency relation of single-field inflation. We also consider the collapsed limit of the scalar trispectrum, and find that the exchange of partially massless fields enhances its magnitude, while giving no contribution to the scalar bispectrum. These characteristic signatures provide clean detection channels for partially massless fields during inflation.
Full work available at URL: https://arxiv.org/abs/1712.06624
No records found.
No records found.
This page was built for publication: Partially massless fields during inflation
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q1641816)
