Electroweak scale

In particle physics, the electroweak scale, also known as the Fermi scale, is the energy scale around 246 GeV, a typical energy of processes described by the electroweak theory. The particular number 246 GeV is taken to be the vacuum expectation value v = ( G F 2 ) − 1 / 2 {displaystyle v=(G_{F}{sqrt {2}})^{-1/2}} of the Higgs field (where G F {displaystyle G_{F}} is the Fermi coupling constant). In some cases the term electroweak scale is used more loosely to refer to energies in a broad range around 100-1000 GeV. In particle physics, the electroweak scale, also known as the Fermi scale, is the energy scale around 246 GeV, a typical energy of processes described by the electroweak theory. The particular number 246 GeV is taken to be the vacuum expectation value v = ( G F 2 ) − 1 / 2 {displaystyle v=(G_{F}{sqrt {2}})^{-1/2}} of the Higgs field (where G F {displaystyle G_{F}} is the Fermi coupling constant). In some cases the term electroweak scale is used more loosely to refer to energies in a broad range around 100-1000 GeV. Interactions may have been above this scale during the electroweak epoch. In the unextended Standard Model, the transition from the electroweak epoch was not a first or a second order phase transition but a continuous crossover, preventing any baryogenesis. However many extensions to the standard model including supersymmetry and the inert double model have a first order electroweak phase transition (but still lack additional CP violation).