SU(2)${}_R$ and its Axion in Cosmology: A common Origin for Inflation, Cold Sterile Neutrinos, and Baryogenesis

Abstract

We introduce an axion-inflation model embedded in the Left-Right symmetric extension of the SM in which $W_R$ is coupled to the axion. This model merges three milestones of modern cosmology, i.e., inflation, cold dark matter, and baryon asymmetry. Thus, it can naturally explain the observed coincidences among cosmological parameters, i.e., ${\eta }_B\approx P_{\zeta }$ and ${\Omega }_{DM}\simeq 5{\Omega }_B$. The source of asymmetry is spontaneous CP violation in the physics of inflation, and the lightest right-handed neutrino is the cold dark matter candidate with mass $m_{N_1}\sim 1GeV$. The introduced mechanism does not rely on the largeness of the unconstrained CP-violating phases in the neutrino sector nor fine-tuned masses for the heaviest right-handed neutrinos. It has two unknown fundamental scales, i.e. scale of inflation ${\Lambda }_{\inf }=\sqrt{H{M}_{Pl}}$ and left-right symmetry breaking ${\Lambda }_F$. Sufficient matter asymmetry demands ${\Lambda }_{\inf }\approx {\Lambda }_F$. The baryon asymmetry and dark matter today are remnants of a pure quantum effect (chiral anomaly) in inflation, which, thanks to flavor effects, are memorized by cosmic evolution.

arXiv comment5+5 pages, 7 Figures

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Cited by in corpus (14)

• New physics from the polarised light of the cosmic microwave background
• Lattice Simulations of Axion-U(1) Inflation
• Lattice simulations of Abelian gauge fields coupled to axions during Inflation
• New constraints on axion-gauge field dynamics during inflation from $Planck$ and BICEP/Keck data sets
• The non-linear dynamics of axion inflation: a detailed lattice study
• Lattice Simulations of Inflation
• Kick it like DESI: PNGB quintessence with a dynamically generated initial velocity
• Gravitational waves from spectator Gauge-flation
• The Inflated Chern-Simons Number in Spectator Chromo-Natural Inflation
• On Sphaleron Heating in the Presence of Fermions
• $\mu$-Hybrid Inflation and Metastable Cosmic Strings in $\mathbf{SU}(3{)}_{\mathbf{c}}\times \mathbf{SU}(2{)}_{\mathbf{L}}\times \mathbf{SU}(2{)}_{\mathbf{R}}\times \mathbf{U}(1{)}_{\mathbf{B}-\mathbf{L}}$
• Production and backreaction of massive fermions during axion inflation with non-Abelian gauge fields
• Axion anomalies
• The Stochastic Schwinger Effect