Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Structure and Dynamics of Nuclei VIII
HK 36.4: Vortrag
Mittwoch, 16. März 2016, 15:00–15:15, S1/01 A03
Two- and Three-Nucleon Chiral Interactions in Quantum Monte Carlo Calculations for Nuclear Physics — •Joel Lynn1, Ingo Tews2, Joseph Carlson3, Stefano Gandolfi3, Alexandros Gezerlis4, Kevin Schmidt5, and Achim Schwenk1,6 — 1Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 2Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195, USA — 3Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA — 4Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1, Canada — 5Department of Physics, Arizona State University, Tempe, Arizona 85287, USA — 6ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
I present our recent work on Green’s function Monte Carlo calculations of light nuclei using local two- and three-nucleon interactions derived from chiral effective field theory up to next-to-next-to-leading order (N2LO). I discuss the choice of observables we make to fit the two low-energy constants which enter in the three-nucleon sector at N2LO: the 4He binding energy and n–α elastic scattering P-wave phase shifts. I then show some results for light nuclei. I also show our results for the energy per neutron in pure neutron matter using the auxiliary-field diffusion Monte Carlo method and discuss regulator choices. Finally I discuss some exciting future projects which are now possible.