Narrow Results

The results of the analysis of the new experimental astrophysical S factors $S_{24}^{\mathrm{\text{exp}}}(E)$ [D. Trezzi et al., Astropart. Phys. 89, 57 (2017)] and those measured earlier [R. G. Robertson et al., Phys. Rev. Lett. 47, 1867 (1981)] for the nuclear-astrophysical $d{(\alpha ,\gamma )}^6\mathrm{\text{Li}}$ reaction directly measured at extremely low energies $E$, which is derived within the modified two-body potential method, are presented. New estimates and their uncertainties have been obtained for values of the asymptotic normalization coefficient for $\alpha +d\to {}^6\mathrm{\text{Li}}$ and for the direct astrophysical $S$ factors at Big Bang energies.