论文标题
在$^{15} \ Mathrm {n} $上辐射质子捕获在有效字段理论中
Radiative proton capture on $^{15}\mathrm{N}$ within effective field theory
论文作者
论文摘要
$^{15} \ Mathrm {n} $ nucleus，即，$^{15} \ Mathrm {n}（p，γ）^{16} \ Mathrm {O} $在Stellar odorwork nectortion fielword foreward foreward foreward foreward，热核$^{15} \ mathrm {n}（p，γ）^{16} \ Mathrm {O} $反应将类型-I与碳氮氧气周期的类型II周期联系起来，并影响Univere元素的丰度。为了在有效的田间理论形式主义中调查这种反应，我们首先构建了一种适合该反应的有效的拉格朗日语，该反应在低碳中。由于$^{16} \ mathrm {o} $ nucleus的中间激发态在此反应中起着至关重要的作用，因此我们将这些共鸣包括在形式主义中。计算了相应的辐射捕获幅度和横截面，这导致了天体物理$ S $。在有效拉格朗日中引入的低能常数是通过将理论结果拟合到观察到的$ s $因子的$ 130〜 \ mathrm {kev} <e_p <2500〜 \ mathrm {kev} $的范围内，使用三个不同的实验数据集。考虑到最近的数据集，我们获得了$ s（0）= 29.8 \ mbox { - } 34.1〜 \ Mathrm {kev \ b} $，这与文献中$ r $ -matrix方法的估计值非常共识。发现Gamow Energy的$ S $的值大于$ s（0）$值$ 10 \％$。
The astrophysical $S$ factor for the radiative proton capture process on the $^{15}\mathrm{N}$ nucleus, i.e., $^{15}\mathrm{N}(p, γ)^{16}\mathrm{O}$, at stellar energies are studied within the framework of the cluster effective field theory. The thermonuclear $^{15}\mathrm{N}(p, γ)^{16}\mathrm{O}$ reaction links the type-I to type-II cycles of the carbon-nitrogen-oxygen cycle and affects the abundances of elements in the univere. For investigating this reaction in the effective field theory formalism, we first construct an effective Lagrangian that is appropriate for this reaction at low-energies. Since the intermediate excited states of the $^{16}\mathrm{O}$ nucleus have a crucial role in this reaction, we include these resonances in the formalism. The corresponding radiative capture amplitudes and cross section are calculated, which lead to the astrophysical $S$ factor. The low energy constants introduced in the effective Lagrangian are determined by fitting the theoretical results to the observed $S$ factors in the range of $130~\mathrm{keV} < E_p < 2500~\mathrm{keV}$ using three different experimental data sets. Considering the recent data sets, we obtain $S(0) = 29.8\mbox{-}34.1~\mathrm{keV\ b}$, which is in a good agreement with the estimates from $R$-matrix approaches in the literature. The values of $S$ at the Gamow energy are found to be larger than $S(0)$ values by about $10\%$.
