In
particle physics, the electroweak interaction is the unified description of two of the four
fundamental interactions of nature:
electromagnetism and the
weak interaction. Although these two forces appear very different at everyday low energies, the theory models them as two different aspects of the same force. Above the unification energy, on the order of 102
GeV, they would merge into a single electroweak force. Thus if it is hot enough (approximately 1015
K, a temperature reached early in the
Big Bang) then the electromagnetic force and weak force will merge into a combined electroweak force.
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The combined force of electromagnetism and weak nuclear force. The unification of these two forces is described by the Glashow-Weinberg-Salom theory. It states that at sufficiently high energy the forces of
electromagnetism and the weak nuclear force act in exactly the same way. The theory has been verified as true in large particle accelerators It is the first step in unifying all the forces of nature, the next step combines the strong nuclear force. This is known as a grand unified theory. The unification of gravity requires a quantum theory of gravity first.
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