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Journal of High Energy Physics

, 2018:22 | Cite as

Neutrino signatures in primordial non-gaussianities

  • Xingang Chen
  • Yi Wang
  • Zhong-Zhi Xianyu
Open Access
Regular Article - Theoretical Physics
  • 40 Downloads

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 inflation. Interestingly, we show that the slow-roll background of the inflaton 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.

Keywords

Cosmology of Theories beyond the SM Neutrino Physics 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  1. 1.Institute for Theory and ComputationHarvard-Smithsonian Center for AstrophysicsCambridgeU.S.A.
  2. 2.Department of PhysicsThe Hong Kong University of Science and TechnologyKowloonP.R. China
  3. 3.Jockey Club Institute for Advanced StudyThe Hong Kong University of Science and TechnologyKowloonP.R. China
  4. 4.Center of Mathematical Sciences and ApplicationsHarvard UniversityCambridgeU.S.A.
  5. 5.Department of PhysicsHarvard UniversityCambridgeU.S.A.

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