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Bonn 2010 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Struktur und Dynamik von Kernen IV

HK 20.4: Talk

Tuesday, March 16, 2010, 15:00–15:15, HG VII

Nuclear electromagnetic currents from chiral EFT — •Stefan Kölling1,2, Evgeny Epelbaum1,2, Hermann Krebs2, and Ulf-G. Meißner1,21Forschungszentrum 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.

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