Frankfurt 2014 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 25: Struktur und Dynamik von Kernen
HK 25.4: Talk
Tuesday, March 18, 2014, 17:45–18:00, HZ 5
Four-Body Forces in Ab Initio Nuclear Structure — •Stefan Schulz, Angelo Calci, and Robert Roth — Institut für Kernphysik, Technische Universität Darmstadt
Nucleon-nucleon (NN) and three-nucleon (3N) interactions derived from chiral effective field theory, transformed using the similarity renormalization group (SRG), have been successful in the ab initio description of nuclear-structure. Previous investigations have shown strong indications for sizable effects originating by SRG-induced four-nucleon (4N) contributions.
To obtain reliable results, the 4N contributions can either be suppressed or included in nuclear-structure calculations. We present an efficient scheme to take induced as well as initial 4N forces into account by performing the SRG transformation in four-body space and extending the importance-truncated no-core shell model (IT-NCSM) for their explicit inclusion. We investigate the effect of induced forces beyond the three-body level in ab intio nuclear-structure calculations and present results for p-shell nuclei up to 16O.
* Supported by DFG (SFB 634), HIC for FAIR, and BMBF (06DA7047I)