Nuclear electromagnetic currents from chiral EFT

ORAL

Abstract

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.

*This work was supported by the Helmoltz Association grants VH-NG-222, VH-VI-231, by the DFG SFB/TR 16 and Ohio University.

–

Authors

  • Stefan K\"olling

    • Forschungszentrum Juelich/ Ohio University

  • Evgeny Epelbaum

    • Ruhr-Universitaet Bochum

  • Hermann Krebs

    • Ruhr-Universitaet Bochum

  • Ulf-G. Mei{\ss}ner

    • HISKP Universitaet Bonn, IKP-3 Forschungszentrum Juelich, IAS-4 Forschungszentrum Juelich