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Comment on "How (not) to renormalize integral equations with singular potentials in effective field theory"
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⚛️ nucl-th
hep-ph
keywords
inconsistenciespotentialrenormalizationsingularamplitudecommentconclusioncritically
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I critically discuss two of the potential inconsistencies pointed out in the recent manuscript by Epelbaum, Gasparyan, Gegelia and Meissner, published in Eur. Phys.J. A54, 186 (2018). The potential inconsistencies are: (i) a possible mismatch between the $\hbar$ expansion of the scattering amplitude and renormalization, (ii) an impossibility of "non-perturbative renormalization" to deal with repulsive singular interactions. The conclusion is that these inconsistencies do not happen.
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Cited by 1 Pith paper
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Auxiliary counterterms and their role in effective field theory
Auxiliary counterterms provide exact cutoff independence in EFTs but encode no new physics and aid renormalization consistency and convergence.
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