Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Structure and Dynamics of Nuclei VIII
HK 36.6: Talk
Wednesday, March 16, 2016, 15:30–15:45, S1/01 A03
Quantum Monte Carlo calculations of two neutrons in finite volume with chiral effective field theory interactions⋆ — •Philipp Klos1,2, Martin Hoferichter3, Joel Lynn1,2, Ingo Tews1,3, Stefano Gandolfi4, Hans-Werner Hammer1,2, and Achim Schwenk1,2 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Institute for Nuclear Theory, University of Washington, Seattle — 4Theoretical Division, Los Alamos National Laboratory
Few nucleon systems provide a unique testing ground for nuclear forces. We present auxiliary-field diffusion Monte Carlo simulations of the two-neutron system in finite volume with chiral effective field theory potentials. Both ground-state and excited-state energies in the S-wave channel are compared to results from the Lüscher formula, which provides exact solutions based on scattering data. Future calculations of few-body systems will help to constrain many-body forces, which are crucial for the description of nuclei and nuclear matter, and allow for comparisons with lattice QCD calculations that have approached the physical parameter space in the last years.
⋆This work was supported in part by the ERC Grant No. 307986 STRONGINT, the BMBF under contract 05P15RDFN1, the Helmholtz Association under contract HA216/EMMI and the DOE (Grant No. DE-FG02-00ER41132).