Probing Leptogenesis with the Cosmological Collider

Abstract

Leptogenesis is generally challenging to directly test due to the very high energy scales involved. In this work we propose a new probe for leptogenesis with cosmological collider physics. With the example of a cosmological Higgs collider, we demonstrate that during inflation leptogenesis models can produce detectable primordial non-Gaussianity with distinctive oscillatory patterns that encode information about the lepton-number violating couplings, the Majorana right-hand neutrino masses, and the CP phases, which are essential to leptogenesis.

arXiv commentJournal version, 6 pages + 3 pages of supplemental material

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Cited by in corpus (24)

• Boostless Cosmological Collider Bootstrap
• Cosmological Bootstrap in Slow Motion
• Bootstrapping Multi-Field Inflation: non-Gaussianities from light scalars revisited
• Phase Information in Cosmological Collider Signals
• Helical Inflation Correlators: Partial Mellin-Barnes and Bootstrap Equations
• Bootstrapping One-Loop Inflation Correlators with the Spectral Decomposition
• Closed-Form Formulae for Inflation Correlators
• Classical Cosmological Collider Physics and Primordial Features
• Parity-Odd and Even Trispectrum from Axion Inflation
• NANOGrav signal from axion inflation
• Searching for Cosmological Collider in the Planck CMB Data
• Gravitational Wave Probes of Massive Gauge Bosons at the Cosmological Collider
• Continuous Spectrum on Cosmological Collider
• An Effective Cosmological Collider
• Analytic Formulae for Inflationary Correlators with Dynamical Mass
• The Massive Flat Space Limit of Cosmological Correlators
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Primordial non-Gaussianity as a probe of seesaw and leptogenesis
• The cosmological collider in $R^2$ inflation
• Scalar Triplet Leptogenesis with a CP violating phase
• Genesis of baryon and dark matter asymmetries through ultraviolet scattering freeze-in
• Amplifying the Cosmological Collider with Ghost Spectators
• Searching for Unparticles with the Cosmic Microwave Background
• Non-relativistic Cosmological Collider Signals