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I'm approaching the study of EFT but i'm facing some problems. While in QFT usually we want renormalizable theories, in EFT we don't want this costraint anymore and this opens up space for a lot more terms in the Lagrangian.

My problem is that when we want to calculate amplitudes, if we want to go beyond the leading order, we have to deal with loops that, as usually, diverge and we have to renormalize adding counterterms. So, what's the point if we still have to renormalize? Why are they called non-renormalizable if we still renormalize the theory?

Thanks for the help,

Luca

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# A Quantum Field Theory vs Effective Field Theory

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