Bonn 2010 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 20: Struktur und Dynamik von Kernen IV
HK 20.4: Vortrag
Dienstag, 16. März 2010, 15:00–15:15, HG VII
Nuclear electromagnetic currents from chiral EFT — •Stefan Kölling1,2, Evgeny Epelbaum1,2, Hermann Krebs2, and Ulf-G. Meißner1,2 — 1Forschungszentrum Jülich, Institut für Kernphysik (IKP-3) und Jülich Center for Hadron Physics, Jülich, Deutschland — 2Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) und Bethe Center for Theoretical Physics, Bonn, Deutschland
Using the method of unitary transformation in combination with chiral effective field theory we derive the pion exchange contributions to the two-nucleon electromagnetic current. A formal definition of the current operator in this scheme and the power counting is presented. We discuss the implications of additional unitary transformations that have to be present to ensure the renormalizability of the one-pion exchange current. Further, we give explicit and compact results for the current in coordinate-space.