title: Ab initio description of p-shell hypernuclei.
abstract: We present the first ab initio calculations for p-shell single-Λ hypernuclei. For the solution of the many-baryon problem, we develop two variants of the no-core shell model with explicit Λ and Σ(+),Σ(0),Σ(-) hyperons including Λ-Σ 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 (Λ)(7)Li, (Λ)(9)Be, and (Λ)(13)C. 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.
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany.
authors.forename: Roland
authors.initials: R
authors.lastname: Wirth
authors.affiliation: ECT*, Villa Tambosi, 38123 Villazzano, Trento, Italy and Nuclear Physics Institute, 25068 Řež, Czech Republic.
authors.forename: Daniel
authors.initials: D
authors.lastname: Gazda
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
authors.forename: Petr
authors.initials: P
authors.lastname: Navrátil
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany.
authors.forename: Angelo
authors.initials: A
authors.lastname: Calci
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Langhammer
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 2, 64289 Darmstadt, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Roth