Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Hadron Structure and Spectroscopy IV

HK 22.4: Vortrag

Dienstag, 27. Februar 2018, 17:30–17:45, HZO 50

Precise nucleon-nucleon potentials from chiral EFT — •Patrick Reinert, Evgeny Epelbaum, and Hermann Krebs — Institut für Theoretische Physik II, Ruhr-Universität Bochum, Germany

Ab initio calculations in few- and many-body systems require precise two-nucleon forces as input. We present new nucleon-nucleon (NN) potentials up to fifth order in chiral effective field theory, whose adjustable parameters have been fitted to the 2013 Granada database of experimental NN scattering data. We employ a new local regularization scheme for long-range forces in momentum space which does not distort the long-range behavior of the interaction and allows for a systematic extension to three-nucleon forces and currents. Furthermore, the contact interaction part of the potentials is studied and we discuss both the removal of redundant contact interaction terms at fourth order as well as the inclusion of sixth order contact interactions in F-Waves and their effects on the two-nucleon system.