Neutrino Signatures in Primordial Non-Gaussianities

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.

31 pages, JHEP accepted version

References in corpus (15)

• Primordial Non-Gaussianities from Inflation Models
• Non-Gaussianity as a Particle Detector
• Heavy-Lifting of Gauge Theories By Cosmic Inflation
• On the Inflationary Perturbations of Massive Higher-Spin Fields
• Galaxy Bispectrum from Massive Spinning Particles
• Models of the Primordial Standard Clock
• Standard Clock in Primordial Density Perturbations and Cosmic Microwave Background
• Phenomenology of fermion production during axion inflation
• Imprints of Spinning Particles on Primordial Cosmological Perturbations
• Strongly Coupled Quasi-Single Field Inflation
• Searching for Standard Clocks in the Primordial Universe
• Quantum Standard Clocks in the Primordial Trispectrum
• Warm Quasi-Single Field Inflation
• Heavy Particle Signatures in Cosmological Correlation Functions with Tensor Modes
• A Direct Probe of the Evolutionary History of the Primordial Universe

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