Ab Initio Description of p-Shell Hypernuclei

0440127 - ÚJF 2015 RIV US eng J - Journal Article
Wirth, R. - Gazda, Daniel - Navratil, P. - Calci, A. - Langhammer, J. - Roth, R.
Ab Initio Description of p-Shell Hypernuclei.
Physical Review Letters. Roč. 113, č. 19 (2014), s. 192502. ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA ČR(CZ) GAP203/12/2126; GA MŠMT LG14038
Institutional support: RVO:61389005
Keywords : effective field theory * strangeness nuclear-physics * lambda-hypernuclei
Subject RIV: BE - Theoretical Physics
Impact factor: 7.512, year: 2014

We present the first ab initio calculations for p-shell single-Lambda hypernuclei. For the solution of the many-baryon problem, we develop two variants of the no-core shell model with explicit Lambda and Sigma(+); Sigma(0), Sigma(-) Shyperons including Lambda-Sigma conversion, optionally supplemented by a similarity renormalization group transformation to accelerate model-space convergence. In addition to state-of-the-art chiral two- and three-nucleon interactions, we use leading-order chiral hyperon-nucleon interactions and a recent meson-exchange hyperon-nucleon interaction. We validate the approach for s-shell hypernuclei and apply it to p-shell hypernuclei, in particular to Li-7(Lambda), Be-9(Lambda), and C-13(Lambda). We show that the chiral hyperon-nucleon interactions provide ground-state and excitation energies that generally agree with experiment within the cutoff dependence. At the same time we demonstrate that hypernuclear spectroscopy provides tight constraints on the hyperon-nucleon interactions.
Permanent Link: http://hdl.handle.net/11104/0243249