= Effective field theory
{wiki=Effective_field_theory}
Effective field theory (EFT) is a framework in theoretical physics used to describe physical systems at specific energy scales while accounting for the effects of higher energy processes in a systematic way. The main idea behind EFT is that, at a given energy scale, we can ignore the details of physics that occurs at much higher energy scales, focusing instead on the degrees of freedom and interactions relevant to the low-energy behavior of the system.
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