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Inparticle physics, theelectroweak scale, also known as theFermi scale, is theenergy scale around 246GeV, a typicalenergy of processes described by theelectroweak theory. The particular number 246 GeV is taken to be thevacuum expectation value${\displaystyle v=(G_F\sqrt{2}{)}^{-1/2}}$ of theHiggs field (where${\displaystyle G_F}$ is theFermi coupling constant). In some cases the termelectroweak scale is used to refer to the temperature of electroweak symmetry breaking, 159.5±1.5 GeV^[1]. In other cases, the term is used more loosely to refer to energies in a broad range around 10² - 10³ GeV. This is within reach of theLarge Hadron Collider (LHC), which is designed for about 10⁴ GeV in proton–proton collisions.

Interactions may have been above this scale during theelectroweak epoch. In the unextendedStandard Model, the transition from theelectroweak epoch was not a first or a second orderphase transition but a continuous crossover, preventing anybaryogenesis.^[2] However many extensions to the standard model includingsupersymmetry and the inert double model have a first order electroweak phase transition (but still lack additionalCP violation).

• Hierarchy problem
• Grand unification scale (10¹⁶ GeV)
• Planck scale (10¹⁹ GeV)

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