Effective field theories (EFTs) are types of approximations that contain the appropriate degrees of freedom to describe physical phenomena occurring at a chosen length scale, while ignoring the substructure and the degrees of freedom at shorter distances or higher energies. The EFT method of approximation is widely used to analyze a myriad of phenomena in many different areas of high-energy physics, from the low-energy scales of atomic and nuclear physics to the high-energy scales of elementary particle physics. Dr. William Watson of OSTI’s staff provides an overview of EFTs and describes some of the latest DOE research endeavors utilizing the EFT concept in his latest white paper ‘Effective field theory: In the OSTI Collections’.
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Examples of EFTs Utilized in DOE Research