Gießen 2024 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 75: Invited Talks IV
HK 75.1: Hauptvortrag
Freitag, 15. März 2024, 11:00–11:30, HBR 14: HS 1
Precision theory for charge radii of light nuclei — •Arseniy Filin1, Vadim Baru1, Evgeny Epelbaum1, Christopher Körber1, Hermann Krebs1, Daniel Möller1, Andreas Nogga2, and Patrick Reinert1 — 1Institut für Theoretische Physik II, Ruhr-Universität Bochum, Bochum, Germany — 2IAS-4, IKP-3, JHCP, and CASA Forschungszentrum Jülich, Juilich, Germany
Charge radii of light nuclei characterize the distribution of electric charge inside the corresponding nuclei and are a perfect tool to test modern high-precision nuclear forces. Experimentally, these radii can be extracted from electron scattering and the laser spectroscopy of normal and muonic atoms with the sub-percent level of accuracy. Theoretical description with a similar accuracy level requires a very good understanding of two- and three-body forces, two-body electromagnetic currents, and various relativistic effects. We present a high-accuracy calculation of the nuclear structure for A=2,3,4 nuclei using the latest two- and three-nucleon forces and charge density operators derived up through the fifth order in the chiral effective field theory. We predict the structure radii of the deuteron, the alpha-particle and the isoscalar combination of 3H and 3He and perform a comprehensive analysis of various sources of uncertainties. Using the predicted values of the 2H and 4He structure radii combined with the spectroscopic measurements of the deuteron-proton charge radius difference and 4He charge radius we extract the neutron and proton charge radii.
Keywords: Charge radii; Chiral effective field theory