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HK: Fachverband Physik der Hadronen und Kerne
HK 15: Structure and Dynamics of Nuclei I
HK 15.5: Vortrag
Dienstag, 31. August 2021, 18:00–18:15, H4
Precision calculation of deuteron form factors in chiral effective field theory — Arseniy A. Filin1, •Daniel Möller1, Vadim Baru1,2,3, Evgeny Epelbaum1, Hermann Krebs1, and Patrick Reinert1 — 1Ruhr-Universität Bochum, Fakultät für Physik und Astronomie, Institut für Theoretische Physik II, D-44780 Bochum, Germany — 2Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218 Moscow, Russia — 3P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991, Leninskiy Prospect 53, Moscow, Russia
We employ the precise two-nucleon potentials worked out to fifth order in chiral effective field theory to perform high-accuracy calculations of the deuteron form factors. The corresponding electromagnetic charge and current operators are derived and regularized consistently with the potentials. The single-nucleon contributions to these operators are expressed in terms of the proton and neutron form factors, for which up-to-date empirical parametrizations are employed. The short-range two-nucleon operators contain undetermined parameters which are fixed from the deuteron static moments and/or the world data of deuteron form factors, allowing for different kinds of predictions. A comprehensive error analysis is carried out, including a Bayesian analysis of the uncertainty stemming from the truncation of the chiral expansion.
Supported by DFG (CRC 110)