TY  - JOUR
AU  - Semikoz, V. B.
AU  - Sokoloff, D. D.
AU  - Valle, J. W. F.
PY  - 2012
DA  - 2012//
TI  - Lepton asymmetries and primordial hypermagnetic helicity evolution
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 008
EP  - 12pp
VL  - 06
IS  - 6
PB  - Iop Publishing Ltd
KW  - Magnetohydrodynamics
KW  - galactic magnetic fields
KW  - cosmic magnetic fields theory
KW  - particle physics – cosmology connection
AB  - 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.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1205.3607
UR  - https://doi.org/10.1088/1475-7516/2012/06/008
DO  - 10.1088/1475-7516/2012/06/008
LA  - English
N1  - WOS:000306003500008
ID  - Semikoz_etal2012
ER  -