Erlangen 2026 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Structure and Dynamics of Nuclei VI

HK 22.1: Group Report

Wednesday, March 18, 2026, 13:45–14:15, AM 00.021

Momentum-dependent electroweak currents in deformed nuclei — •Rui Han¹, Betânia Backes², Jacek Dobaczewski^2,3, Weiguang Jiang⁴, Markus Kortelainen^5,6, Gabriel Martínez-Pinedo^1,7,8, and Herlik Wibowo² — ¹GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — ²Department of Physics, University of York, York, United Kingdom — ³Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland — ⁴Institut für Kernphysik and PRISMA+ Cluster of Excellence, Johannes Gutenberg-Universität, Mainz, Germany — ⁵Department of Physics, University of Jyväskylä, Jyväskylä, Finland — ⁶Helsinki Institute of Physics, University of Helsinki, Helsinki, Finland — ⁷Institut für Kernphysik (Theoriezentrum), Fachbereich Physik, Technische Universität Darmstadt, Darmstadt, Germany — ⁸Helmholtz Forschungsakademie Hessen für FAIR, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany

For weak processes such as neutrino-nucleus scattering and muon capture, the momentum transfer can be large enough that long-wavelength approximations break down, and chiral EFT two-body currents may contribute significantly. A framework is presented to evaluate momentum-dependent one- and two-body electroweak currents in deformed open-shell nuclei within nuclear DFT. Magnetic dipole moments serve as a benchmark for validating the consistent implementation of chiral two-body currents, and current progress toward a unified finite-q treatment for weak processes is outlined.

Keywords: electroweak current; deformed nuclei; density functional theory