7Be(p,γ)8B S-factor from ab initio wave functions

There has been a significant progress in ab initio approaches to the structure of light nuclei. Starting from realistic two- and three-nucleon interactions the ab initio no-core shell model (NCSM) predicts low-lying levels in p-shell nuclei. It is a challenging task to extend ab initio methods to describe nuclear reactions. We present here a brief overview of the the first steps taken toward nuclear reaction applications. In particular, we discuss our calculation of the 7Be(p,γ)8B S-factor. We also present our first results of the 3He(α, γ)7Be S-factor and of the S-factor of the mirror reaction 3H(α, γ)7Li. The 7Be(p,γ)8B and 3He(α, γ)7Be reactions correspond to the most important uncertainties in solar model predictions of neutrino fluxes.