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arXiv 2102.02860nucl-th
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Halo EFT计算双中子${}^{6}\textrm{He}$晕核电荷形状因子：两体共振P波相互作用

Halo EFT calculation of charge form factor for two-neutron ${}^{6}\textrm{He}$ halo nucleus: two-body resonant P-wave interaction

S. Jesri, M. Moeini Arani, S. Bayegan

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摘要：

本文对$^{6}\textrm{He}$晕核进行了新的研究，建立了低能晕有效场论，计算了具有共振P波相互作用的${}^{6}\textrm{He}$系统的电荷形状因子。引入P波拉格朗日量，计算了${}^{6}\textrm{He}$晕核的电荷形状因子。在本研究中，${}^{6}\textrm{He}$核相对于${}^{4}\textrm{He}$核的均方电荷半径和${}^{6}\textrm{He}$核的均方根（r.m.s）电荷半径分别被估计为$\langle r_{E}^{2}\rangle=1.408\; \textrm{fm}^{2}$和$\langle r_{E}^{2}\rangle_{{}^{6}He}^{\frac{1}{2}}=2.058 \;\textrm{fm}$。我们的结果与其他可用的理论和实验数据进行了比较。

英文摘要：

We take a new look at $^{6}\textrm{He}$ halo nucleus and set up a halo effective field theory at low energies to calculate the charge form factor of ${}^{6}\textrm{He}$ system with resonant P-wave interaction. P-wave Lagrangian has been introduced and the charge form factor of ${}^{6}\textrm{He}$ halo nucleus has been obtained at Leading-Order. In this study, the mean-square charge radius of ${}^{6}\textrm{He}$ nucleus relative to ${}^{4}\textrm{He}$ core and the root-mean-square (r.m.s) charge radius of ${}^{6}\textrm{He}$ nucleus have been estimated as $\langle r_{E}^{2}\rangle=1.408\; \textrm{fm}^{2}$ and $\langle r_{E}^{2}\rangle_{{}^{6}He}^{\frac{1}{2}}=2.058 \;\textrm{fm}$, respectively. We have compared our results with the other available theoretical and experimental data.

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