Ab Initio Description of p-Shell Hypernuclei

0440127 - ÚJF 2015 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GAP203/12/2126; GA MŠMT LG14038
Institucionální podpora: RVO:61389005
Klíčová slova: effective field theory * strangeness nuclear-physics * lambda-hypernuclei
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 7.512, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0243249