title: Unified description of ^{6}Li structure and deuterium-^{4}He dynamics with chiral two- and three-nucleon forces.
abstract: We provide a unified ab initio description of the ^{6}Li ground state and elastic scattering of deuterium (d) on ^{4}He (α) using two- and three-nucleon forces from chiral effective field theory. We analyze the influence of the three-nucleon force and reveal the role of continuum degrees of freedom in shaping the low-lying spectrum of ^{6}Li. The calculation reproduces the empirical binding energy of ^{6}Li, yielding an asymptotic D- to S-state ratio of the ^{6}Li wave function in the d+α configuration of -0.027, in agreement with a determination from ^{6}Li-^{4}He elastic scattering, but overestimates the excitation energy of the 3^{+} state by 350 keV. The bulk of the computed differential cross section is in good agreement with data. These results endorse the application of the present approach to the evaluation of the ^{2}H(α,γ)^{6}Li radiative capture, responsible for the big-bang nucleosynthesis of ^{6}Li.
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551, USA.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Hupin
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551, USA.
authors.forename: Sofia
authors.initials: S
authors.lastname: Quaglioni
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
authors.forename: Petr
authors.initials: P
authors.lastname: Navrátil