Speaker
Description
The radiative proton capture reaction of $^{15}\mathrm{N}(p, \gamma)^{16}\mathrm{O}$ is one of the thermonuclear reactions in the carbon-nitrogen-oxygen (CNO) cycle. This process provides a link between the type-I (CN) cycle and type-II (NO) cycle so that the $^{16}\mathrm{O}$ nucleus can be produced and the further types of the cycle start. We investigated the $^{15}\mathrm{N}(p, \gamma)^{16}\mathrm{O}$ reaction in the effective field theoretical approach. The effective Lagrangian which is appropriate for this reaction in a stellar environment is introduced, and the capture amplitude and the corresponding S factor are calculated. In this work, we included two resonances due to the excited states of $^{16}\mathrm{O}$ as di-field propagators. By fitting our theoretical result to the empirical data of the S factor we determined the model parameters such as the low-energy constants and the S factor values of $S(0)=29.8-34.1~\mathrm{keV\ b}$ from the recent data sets are estimated. These results are compared to the estimations from several approaches such as the R-matrix and the potential models.
