### Sofia Quaglioni

Lawrence Livermore National Laboratory
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An ab initio approach to light-nuclei scattering and reactions

The exact treatment of nuclei starting from the constituent nucleons and the
fundamental interactions among them has been a long-standing goal in nuclear physics.
In particular, nuclear scattering and reactions require the solution of the many-body
quantum-mechanical problem in the continuum, and thus represent an extraordinary theoretical
as well as computational challenge for ab initio (i.e., first principle) approaches. Due
to the advent of new theoretical techniques and exceptional improvements in computational
capabilities, ab initio calculations are now beginning to address nuclear reactions among
light nuclei. Yet, the field is still in its infancy, and we have a great deal more to
learn in order to understand light-ion fusion reactions, but also light exotic nuclei, for
which most low-lying states are unbound, so that a rigorous analysis requires scattering
conditions. I will present one of such new techniques, an ab initio many-body approach, which
derives from the combination of the ab initio no-core shell model with the resonating-group
method, and I will review recent results for neutron and proton scattering on s- and light
p-shell nuclei using realistic nucleon-nucleon potentials. In conclusion, I will outline
the progress toward the treatment of deuterium-nucleus scattering and transfer reactions.

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