Primordial magnetic field from chiral plasma instability with sourcing

Abstract

In an electron-positron plasma, an imbalance in the number of right- and left-chiral particles can lead to the growth of a helical magnetic field through a phenomenon called the chiral plasma instability (CPI). In the early universe, scattering reactions that violate chirality come into thermal equilibrium when the plasma cools below a temperature of approximately $80\mathrm{TeV}$. Since these reactions tend to relax any pre-existing chiral asymmetry to zero as the system approaches equilibrium, the standard lore is that primordial magnetogenesis via the CPI is not viable below $80\mathrm{TeV}$. In this work, we propose that the presence of a source for chirality can allow the CPI to operate even below $80\mathrm{TeV}$, we explore the implications of this scenario, and we derive predictions for the resultant magnetic field helicity using a combination of analytical methods and direct numerical simulation.

11 + 2 pages, 7 figures, 2 tables

References in corpus (18)

• The Chiral Magnetic Effect
• Baryogenesis from Decaying Magnetic Helicity
• Evolution of hydromagnetic turbulence from the electroweak phase transition
• Evolution of the Baryon Asymmetry through the Electroweak Crossover in the Presence of a Helical Magnetic Field
• A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and Fermi/LAT observations
• The turbulent chiral-magnetic cascade in the early universe
• The Role of the Electron Mass in Damping Chiral Magnetic Instability in Supernova and Neutron Stars
• Long-range magnetic fields in the ground state of the Standard Model plasma
• Chiral effects in astrophysics and cosmology
• Consistency of Planck, ACT and SPT constraints on magnetically assisted recombination and forecasts for future experiments
• Relic gravitational waves from the chiral magnetic effect
• Modified recombination and the Hubble tension
• Chiral magnetohydrodynamics with zero total chirality
• Hints of Primordial Magnetic Fields at Recombination and Implications for the Hubble Tension
• Chiral anomaly and dynamos from inhomogeneous chemical potential fluctuations
• Relic Gravitational Waves from the Chiral Plasma Instability in the Standard Cosmological Model
• Experimental review on the chiral magnetic effect in relativistic heavy ion collisions
• Efficiency of dynamos from an autonomous generation of chiral asymmetry