Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 31: Struktur und Dynamik von Kernen

HK 31.3: Vortrag

Mittwoch, 19. März 2014, 17:30–17:45, HZ 4

Ab initio description of p-shell hypernuclei — •Roland Wirth, Angelo Calci, Joachim Langhammer, and Robert Roth — Institut für Kernphysik, Technische Universität Darmstadt

Tremendous progress is being made on the experimental study of hypernuclei, especially on the spectroscopy of p-shell hypernuclei. Their theoretical description, however, is limited to phenomenological models or to very light (i.e. s-shell) systems. We present ab initio calculations of p-shell hypernuclei using chiral Hamiltonians including leading-order (LO) hyperon–nucleon as well as two- and three-nucleon interactions at N³LO and N²LO, respectively. To improve convergence with respect to model space size, the Hamiltonians are evolved using a Similarity Renormalization Group (SRG) transformation. The many-body calculations are carried out in the framework of the importance-truncated no-core shell model.

We present the first ab initio results for the spectroscopy of _Λ⁷Li, _Λ⁹Be and _Λ¹³C obtained using chiral and phenomenological hyperon–nucleon interactions. We also discuss the role of SRG-induced hyperon–nucleon–nucleon (YNN) terms which hint at the impact of chiral YNN interactions.

* Supported by DFG (SFB 634), HIC for FAIR and BMBF (06DA7047I)