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arXiv · 2508.07416

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

Yuefeng Di·Ligong Bian·Rong-Gen Cai
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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 $g'B_Y^{ex}/m_W^2\gtrsim3.63$; 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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Yuefeng Di, Ligong Bian, Rong-Gen Cai. 2025-08-10. Impact of Primordial Magnetic Fields on the First-Order Electroweak Phase Transition. https://arxiv.org/abs/2508.07416

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