In search of large signals at the cosmological collider
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DOI: 10.1007/jhep02(2020)044
Abstract: We look for oscillating signals in the primordial bispectrum from new physics heavy particles which are visibly large for next generation large scale structures (LSS) survey. We show that in ordinary inflation scenarios where a… read more here.
Keywords: signals cosmological; search large; physics; cosmological collider ... See more keywords
Continuous spectrum on cosmological collider
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/002
Abstract: We study the effects of a massive field with a continuous spectrum (continuum isocurvaton) on the inflationary bispectrum in the squeezed limit. As a concrete example, we extend the quasi-single field inflation model to include… read more here.
Keywords: bispectrum; continuum isocurvaton; spectrum cosmological; continuous spectrum ... See more keywords