Speaker
Description
The $d(\alpha,\gamma ){^6\textrm{Li}}$ reaction that produces ${^6\textrm{Li}}$ was the primitive reaction in the standard BBN framework. As a consequence of the importance of the reaction, we study the radiative capture process of deuteron on alpha through the cluster Effective Field Theory. In detail, we outline the calculation of the amplitude and S-factor of the capture process leading to the formation of ${^6\textrm{Li}} $. The contribution of two-body currents is also studied. In order to evaluate the accuracy of the approach, we compare the S-factor of the dominant transitions (E1, E2) of the reaction up to next-to-leading order with the results of the model-dependent theoretical calculations and experimental data. The consistency of the results shows the strength of the EFT to describe the few-body systems in low-energy regimes.
