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: $Q_{\tilde{W}}\sim {\mathrm{\Lambda }}^{-2}{\epsilon }_{ijk}{\tilde{W}}_{\mu \nu }^i{W}^{j\nu \rho }{W}_{\rho }^{k\mu }$. We find that the BAU can be explained if $\mathrm{\Lambda }\simeq 38\mathrm{TeV}$. This scenario can be tested by electron electric dipole moment measurements in the near future.

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• Baryogenesis & leptogenesis
• Classical solutions in field theory
• Effective field theory
• Higgs bosons
• W & Z bosons