Perturbative unitarity in quasi-single field inflation
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2021)018
Abstract: Abstract We study implications of perturbative unitarity for quasi-single field inflation with the inflaton and one massive scalar. Analyzing high energy scattering, we show that non-Gaussianities with |fNL| ≳ 1 cannot be realized without turning… read more here.
Keywords: perturbative unitarity; quasi single; field inflation; single field ... See more keywords
Cutkosky rules and perturbative unitarity in Euclidean nonlocal quantum field theories
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.104043
Abstract: We prove the unitarity of the Euclidean nonlocal scalar field theory to all perturbative orders in the loop expansion. The amplitudes in the Euclidean space are calculated assuming that all the particles have purely imaginary… read more here.
Keywords: field; rules perturbative; perturbative unitarity; euclidean nonlocal ... See more keywords