Impact of Primordial Magnetic Fields on the First-Order Electroweak Phase Transition

2025/08/10 by Di, Yuefeng, Bian, Ligong, Cai, Rong-Gen · 1 citation
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2508.07416

Abstract

We numerically study how the primordial magnetic field affects the first-order electroweak phase transition in the early Universe. We observe that: 1) the phase transition process would be slowed down by the magnetic field; 2) the phenomenon of vortex structure of the Higgs condensation appears when the homogenesis hypermagentic field g'B_Y^ex/m_W²\gtrsim3.63; and, 3) the helical hypermagnetic field can dramatically enhance the sphaleron rate and validate the generation of the baryon asymmetry through the chiral anomaly.

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• Chiral magnetic effect amplified baryogenesis at first-order phase transitions

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