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arXiv · 2505.09984

Sphalerogenesis

Masanori Tanaka
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Abstract

We propose a mechanism called sphalerogenesis to explain the baryon asymmetry of the universe (BAU). The BAU is explained by a CP-violating decay of the electroweak sphaleron. We introduce a dimension-six operator constructed from weak gauge fields: $Q_{\widetilde{W}} \sim \Lambda^{-2} \epsilon_{ijk} \widetilde{W}_{\mu \nu}^{i} W^{j \nu \rho} W_{\rho}^{k\mu}$. We find that the BAU can be explained if $\Lambda \simeq 38\,{\rm TeV}$. This scenario can be tested by electron electric dipole moment measurements in the near future.

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Masanori Tanaka. 2025-05-15. Sphalerogenesis. https://arxiv.org/abs/2505.09984

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