Is the baryon asymmetry of the Universe related to galactic magnetic fields?

2009/05/20 by V. B. Semikoz, D. D. Sokoloff, J. W. F. Valle · 2 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #astro-ph.CO #hep-ph

paper · pdf · doi:10.1103/physrevd.80.083510

published as Phys.Rev.D80:083510,2009 · latex file, 4 pages, 1 figure

arxiv created 2009/05/20 · openalex publication_date 2009/10/08 · arxiv updated 2010/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

A tiny hypermagnetic field generated before the electroweak phase transition (EWPT) associated to the generation of elementary particle masses can polarize the early Universe hot plasma at huge redshifts z\ensuremath\gtrsim10¹⁵. The anomalous violation of the right-handed electron current characteristic of the EWPT converts the lepton asymmetry into a baryon asymmetry. Under reasonable approximations, the magnetic field strength inferred by requiring such ``leptogenic'' origin for the observed baryon asymmetry of the Universe matches the large-scale cosmological magnetic field strengths estimated from current astronomical observations.

Citations

• Large-Scale Magnetic Field Generation byαEffect Driven by Collective Neutrino-Plasma Interaction
• On anomalous electroweak baryon-number non-conservation in the early universe

Cited by

• Lepton asymmetry growth in the symmetric phase of an electroweak plasma with hypermagnetic fields versus its washing out by sphalerons
• Chern-Simons anomaly as polarization effect