Lepton asymmetries and primordial hypermagnetic helicity evolution
Cosmology and Nongalactic Astrophysics
2015-06-05 v1 High Energy Physics - Phenomenology
Abstract
The hypermagnetic helicity density at the electroweak phase transition (EWPT) exceeds many orders of magnitude the galactic magnetic helicity density. Together with previous magnetic helicity evolution calculations after the EWPT and hypermagnetic helicity conversion to the magnetic one at the EWPT, the present calculation completes the description of the evolution of this important topological feature of cosmological magnetic fields. It suggests that if the magnetic field seeding the galactic dynamo has a primordial origin, it should be substantially helical. This should be taken into account in scenarios of galactic magnetic field evolution with a cosmological seed.
Cite
@article{arxiv.1205.3607,
title = {Lepton asymmetries and primordial hypermagnetic helicity evolution},
author = {V. B. Semikoz and D. Sokoloff and J. W. F. Valle},
journal= {arXiv preprint arXiv:1205.3607},
year = {2015}
}
Comments
LaTeX, 12 pages, 3 figures, jcappub.sty, to be published in JCAP