QED scattering amplitudes in a chiral medium with constant μ5 and b0 exhibit resonant behavior in multiple processes, with computed rates for 1→2 processes determining widths of fermion and photon states.
Self-consistent evolution of magnetic fields and chiral asymmetry in the early Universe
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abstract
We show that the evolution of magnetic fields in a primordial plasma, filled with Standard Model particles, at temperatures T > 10 MeV is strongly affected by the quantum chiral anomaly -- an effect that has been neglected previously. Although reactions equilibrating left and right-chiral electrons are in deep thermal equilibrium for T < 80 TeV, an asymmetry between these particle develops in the presence of strong magnetic fields. This results in magnetic helicity transfer from shorter to longer scales. This also leads to an effective generation of lepton asymmetry that may survive in the plasma down to temperatures T ~ 10 MeV, which may strongly affect many processes in the early Universe. Although we report our results for the Standard Model, they are likely to play an important role also in its extensions.
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Generic Maxwell fields are obtained as the sum of two pull-backs from independent matter spaces, recovering the F wedge F invariant as mutual helicity between the two sectors.
Chiral magnetic effect generates magnetar-strength dipoles independently of initial net helicity via localized structures on decade timescales.
During chiral plasma instability, excess energy from chiral asymmetry heats the plasma with δT ~ μ5²/T instead of fully building the helical magnetic field.
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Electromagnetism from two matter spaces: mutual helicity and the nondegenerate completion
Generic Maxwell fields are obtained as the sum of two pull-backs from independent matter spaces, recovering the F wedge F invariant as mutual helicity between the two sectors.