Field redefinitions in effective theories at higher orders
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Effective Field TheoriesBeyond Standard Model
Criado, J. C., & Perez-Victoria, M. (2019). Field redefinitions in effective theories at higher orders. Journal of High Energy Physics, 2019(3), 38.
SponsorshipOur work has been supported by the Spanish MINECO project FPA2016-78220-C3-1-P (Fondos FEDER) and the Junta de Andalucía grant FQM101. The work of J.C.C. has also been supported by the Spanish MECD grant FPU14.
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.