In physics, an effective field theory is a type of approximation, or effective theory, for an underlying physical theory, such as a quantum field theory or a statistical mechanics model. An effective field …

Mar 29, 2023 · We show explicitly how to use various effective field theories to study the phenomenology of theories beyond the Standard Model. We give a detailed description of the …

In this context, different types of effective field theories pertaining to various energy scales are considered and selected applications are devised. It also covers the formulation of effective field …

Apr 1, 2022 · An EFT efficiently describes phenomena on a specific energy scale by availing itself of a separation of scales and absorbing the physics at higher energies only into the parameters of lower …

There is a high energy scale M (and a short distance scale 1/𝑀) where an effective theory breaks down. We want to describe light particles (with masses 𝑚𝑖 ≪ 𝑀) and their interactions at low energies, i.e., with …

Low-energy effective quantum field theories – or effective field theories (EFTs), for short – are an important, widely used tool in particle physics and beyond. An effectivetheory, is a theory which only …

For two coupled systems with different energy scales m1 and m2 (m2 > m1) and described by a renormalizable theory, there is always a renormalization condition according to which the effects of …

Jul 25, 2025 · The standard model effective field theory (SMEFT) provides a robust framework for systematically extending the Standard Model (SM) to include higher-dimensional operators [1–3] . …

t the ratio of scales. It relies on the principle of scale separation outlined above: to describe physics at energy E we don’t need dynami s at energies M ≫ E. Instead the efect of high physics at the scale M …

Dec 29, 2024 · The behavior at a lower energy scale can be characterized by an Effective Field Theory (EFT) Definition: Effective Field Theory (EFT) is a field theory where the expansion in \frac …