dimensional regularization


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dimensional regularization

[di′men·chən·əl ‚reg·yəl·ər·ə′zā·shən]
(quantum mechanics)
A method of extracting a finite piece from an infinite result in quantum field theory based on analytically continuing a typically divergent integral in its number of space-time dimensions.
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The areas they cover here are quantum mechanics (revisited) angular momentum, scattering theory, Lagrangian field theory, symmetries, quantum electrodynamics, higher-order processes, path integrals, the multi-pole analysis of the radiation field, irreducible representations of SU(n), Lorentz transformation in quantum field theory, and dimensional regularization.
Their tool, known as dimensional regularization and first described in 1971, also applies to similar theories that describe other forces.