The electroweak scale is the characteristic energy associated with electroweak symmetry breaking. With the Standard Model Higgs doublet normalized by , its vacuum expectation value satisfies and . Its smallness compared with possible ultraviolet scales motivates the hierarchy problem.
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The electroweak scale refers to the energy scale at which the electromagnetic and weak nuclear forces unify into a single force within the framework of the Standard Model of particle physics. This unification occurs at high energies, approximately around \( 10^2 \) to \( 10^3 \) GeV (giga-electronvolts).