paper

Field redefinitions in effective theories at higher orders

arXiv:1811.09413 · doi:10.1007/JHEP03(2019)038

Abstract

The invariance of physical observables under redefinitions of the quantum fields is a well-known and important property of quantum field theory. We study perturbative field redefinitions in effective theories, paying special attention to higher-order effects and their impact on matching to an ultraviolet theory at the classical and quantum levels.

42 pages, 5 figures, matches the published version

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