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Estimate of the primordial magnetic field helicity

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arxiv astro-ph/0101261 v3 pith:WHXAZLVN submitted 2001-01-16 astro-ph hep-ph

classification astro-phhep-ph
keywords fieldhelicitymagneticprimordialchangesdensitynumberargued
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Electroweak baryogenesis proceeds via changes in the non-Abelian Chern-Simons number. It is argued that these changes generate a primordial magnetic field with left-handed helicity. The helicity density of the primordial magnetic field today is then estimated to be given by $\sim 10^2 n_b$ where $n_b\sim 10^{-6}$ /cm$^3$ is the present cosmological baryon number density. With certain assumptions about the inverse cascade we find that the field strength at recombination is $\sim 10^{-13}$ G on a comoving coherence scale $\sim 0.1$ pc.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Primordial Magnetogenesis and Gravitational Waves from ALP-assisted Phase Transition

    hep-ph 2026-04 unverdicted novelty 5.0 of 10

    ALP-assisted first-order phase transitions can explain observed intergalactic magnetic fields and produce detectable gravitational waves, linking cosmology with particle physics searches.

  2. Primordial black holes and magnetic fields in conformal neutrino mass models

    hep-ph 2025-05 unverdicted novelty 5.0 of 10

    Conformal U(1)' seesaw models produce PBHs contributing to dark matter and helical magnetic fields at seesaw scales of 10^4-10^11 GeV, with observable GW, microlensing, and Hawking signals at LISA, Roman, and future g...

  3. Forward cascade of large-scale primordial magnetic fields during structure formation

    astro-ph.CO 2025-08 conditional novelty 4.0 of 10

    A flux-conservation advection equation reproduces the qualitative forward cascade of primordial magnetic field spectra during structure formation.

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