Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 24: Standard Model Physics II
T 24.8: Vortrag
Dienstag, 17. März 2026, 18:00–18:15, KH 00.014
Nonrelativistic reduction of relativistic effective field theories — •Tobias Asano1, Fabio Di Pumpo2, Enno Giese3, and Motoaki Bamba1,4 — 1Department of Physics, Graduate School of Engineering Science, Yokohama National University, Japan — 2Institut für Quantenphysik, Universität Ulm, Germany — 3Technische Universität Darmstadt, Institut für Angewandte Physik, Germany — 4Institute for Multidisciplinary Sciences, Yokohama National University, Japan
The applications of effective field theories (EFTs) range from Standard Model EFT to nonrelativistic (NR) EFTs like NR quantum chromodynamics. A symmetry-based construction of relativistic EFTs, like Standard Model EFT is straightforward. In contrast, Lorentz invariance is not trivial in NR EFTs, making a construction more complicated. While construction rules are well understood for, e.g., NR quantum chromodynamics, there is no simple extension when one includes more fields, such as gravity.
In this work, we present an approach starting from the construction of a relativistic EFT, conceptually close to Standard Model EFT, and perform an NR reduction, centered on an extended Foldy-Wouthuysen transformation, leading to NR quantum chromodynamics, for instance. Such a treatment is highly suited for theories where NR construction rules are not straightforward, such as an EFT on curved spacetime.
This work is supported by the Japan Society for the Promotion of Science (JSPS) (Grant Nos. JP25KJ1313, JP24K21526, JP25K00012, JP25K01691, JP25K01694, JPJSJRP20221202) and the Research Foundation for Opto-Science and Technology.
Keywords: Effective field theory; Nonrelativistic limit; Foldy-Wouthuysen transform