Direct baryogenesis in the broken phase

Abstract

We show a new mechanism for baryogenesis where the reheating temperature can be smaller than the electroweak scale. The baryon number symmetry is violated by a dimension nine operator which conserves a baryon parity. A high energy quark from the decay of a heavy particle, $e.g.$ inflaton, modulus or gravitino, undergoes flavor oscillation, and is thermalized due to the scatterings with the ambient thermal plasma. We point out that the baryon asymmetry of our universe can be generated due to the scatterings via the baryon number violating operator. Our scenario can be tested in neutron-antineutron oscillation experiments as well as other terrestrial experiments.

20pages, 4 figures, published version

References in corpus (12)

• Asymmetric Dark Matter
• Trans-Planckian Censorship and Inflationary Cosmology
• Post--Sphaleron Baryogenesis
• Misalignment & Co.: (Pseudo-)scalar and vector dark matter with curvature couplings
• Spectator Dark Matter
• QCD Axion on Hilltop by a Phase Shift of $\pi$
• Baryogenesis from Oscillations of Charmed or Beautiful Baryons
• ALP inflation and Big Bang on Earth
• Relaxing the Cosmological Moduli Problem by Low-scale Inflation
• Trans-Planckian censorship and single-field inflaton potential
• Throwing away antimatter via neutrino oscillations during the reheating era
• Primordial Lepton Oscillations and Baryogenesis

Cited by in corpus (10)

• Energy Spectrum of Thermalizing High Energy Decay Products in the Early Universe
• Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures
• Cascades of high-energy SM particles in the primordial thermal plasma
• Small cosmological constant from a peculiar inflaton potential
• High Energy Sphalerons for Baryogenesis at Low Temperatures
• Phenomenology of CP-even ALP
• Superheavy dark matter from the natural inflation in light of the highest-energy astroparticle events
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• Suppression of Higgs Mixing by Quantum Zeno Effect
• Baryogenesis via relativistic bubble walls