Matter-antimatter origin of cosmic magnetism

Steinmetz, Andrew; Yang, Cheng Tao; Rafelski, Johann

doi:10.1103/physrevd.108.123522

Phys. Rev. D

2023

DOI: 10.1103/physrevd.108.123522

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Matter-antimatter origin of cosmic magnetism

Andrew Steinmetz,

Cheng Tao Yang,

Johann Rafelski

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2024

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Cited by 3 publications

References 48 publications

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Fermi-Dirac Integrals in Degenerate Regimes: Novel Asymptotic Expansion

Birrell,

Formanek,

Steinmetz

et al. 2024

Int J Theor Phys

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Fermi-Dirac Integrals in Degenerate Regimes: Novel Asymptotic Expansion

Birrell,

Formanek,

Steinmetz

et al. 2024

Int J Theor Phys

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Spin-flavor oscillations of relic neutrinos in primordial magnetic field

Alok,

Chall,

Chundawat

et al. 2024

Phys. Rev. D

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The neutrino magnetic moment operator clasps a tiny but nonzero value within the standard model (SM) of particle physics and rather enhanced values in various new physics models. This generation of the magnetic moment (μν) is through quantum loop corrections which can exhibit spin-flavor oscillations in the presence of an external magnetic field. Also, several studies predict the existence of a primordial magnetic field (PMF) in the early Universe, extending back to the era of Big Bang nucleosynthesis (BBN) and before. The recent North American Nanohertz Observatory for Gravitational Waves measurement can be considered as a strong indication of the presence of these PMFs. In this work, we consider the effect of the PMF on the flux of relic neutrinos. For Dirac neutrinos, we show that half of the active relic neutrinos can become sterile due to spin-flavor oscillations well before becoming nonrelativistic owing to the expansion of the Universe and also before the timeline of the formation of galaxies and hence intergalactic fields, subject to the constraints on the combined value of μν and the cosmic magnetic field at the time of neutrino decoupling. For the upper limit of PMF allowed by the BBN, this can be true even if the experimental bounds on μν approach a few times its SM value. Published by the American Physical Society 2024

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Force-free electromagnetic configurations in FLRW geometry

Adhikari,

Menon,

Medvedev

2024

Phys. Rev. D

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Matter-antimatter origin of cosmic magnetism

Cited by 3 publications

References 48 publications

Fermi-Dirac Integrals in Degenerate Regimes: Novel Asymptotic Expansion

Fermi-Dirac Integrals in Degenerate Regimes: Novel Asymptotic Expansion

Spin-flavor oscillations of relic neutrinos in primordial magnetic field

Force-free electromagnetic configurations in FLRW geometry

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