Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 23: Struktur und Dynamik von Kernen V

HK 23.4: Talk

Tuesday, March 22, 2011, 17:30–17:45, O-1

Chiral two- plus three-body interactions in the Importance Truncated NCSM — •Angelo Calci, Joachim Langhammer, Sven Binder, and Robert Roth — Institut für Kernphysik - Theoriezentrum, Technische Universität Darmstadt

So far, the chiral effective field theory provides the most consistent way to obtain an Hamiltonian with two- (NN) and three-body (3N) interactions from QCD. For the inclusion of these interactions in many-body calculations using an oscillator basis, e.g. the No-Core Shell Model (NSCM), one has to compute three-body matrix elements efficiently. The handling of three-body m-scheme matrix elements is a major bottleneck and limits the model-space size for many-body calculations. We present an improved scheme that allows to perform NCSM calculations for p-shell nuclei in model spaces up to N_max=12. We use the Importance Truncated NCSM with SRG-transformed chiral NN+3N interactions to discuss ground states and spectra throughout the p-shell, e.g. for ⁴He, ⁶Li, ¹⁰B, ¹²C, and ¹⁶O. This provides a rigorous benchmark for chiral Hamiltonians and the SRG transformation.

Supported by DFG (SFB 634), HIC for FAIR, and BMBF (NuSTAR.de).