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- Title
Neutrino signatures in primordial non-gaussianities.
- Authors
Xingang Chen; Yi Wang; Zhong-Zhi Xianyu
- Abstract
We study the cosmological collider phenomenology of neutrinos in an effective field theory. The mass spectrum of neutrinos and their characteristic oscillatory signatures in the squeezed limit bispectrum are computed. Both dS-covariant and slow-roll corrections are considered, so is the scenario of electroweak symmetry breaking during ination. Interestingly, we show that the slow-roll background of the inaton provides a chemical potential for the neutrino production. The chemical potential greatly amplifies the oscillatory signal and makes the signal observably large for heavy neutrinos without the need of fine tuning.
- Subjects
NEUTRINOS; COLLIDERS (Nuclear physics); PHENOMENOLOGICAL theory (Physics); MASS spectrometry; SYMMETRY breaking; ELECTROWEAK interactions
- Publication
Journal of High Energy Physics, 2018, Vol 2018, Issue 9, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP09(2018)022