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arXiv 2409.03074nucl-th
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基于非定域晕有效场论势的$^{6}$He三体模型

Three-body model of $^{6}$He with non-local halo effective field theory potentials

E. C. Pinilla, W. Leidemann, G. Orlandini, P. Descouvemont

AI总结:

本文在坐标表象中基于团簇有效场论导出的非定域两体势建立三体模型,结合超球坐标与Lagrange-mesh技术计算$^6$He基态能量等性质,并引入三体相互作用消除截断参数依赖。

摘要:

我们在坐标表象中,利用基于团簇有效场论(EFT)导出的两体势的三体模型研究了$^6$He Borromean核。这些势最初在动量空间中发展,并经傅里叶变换提供位形空间中的非定域势。我们结合超球坐标与Lagrange-mesh技术计算了$^6$He的基态能量、均方根半径和E1强度分布。我们还引入了三体相互作用,以消除基态能量对两体势截断参数的依赖。如预期,E1强度分布表现出低能共振,但它受三体EFT相互作用选择的强烈影响。

英文摘要:

We study the $^6$He Borromean nucleus in coordinate representation within a three-body model with two-body potentials derived from cluster effective field theory (EFT). These potentials are originally developed in momentum space and Fourier transformed to provide non-local potentials in configuration space. We use hyperspherical coordinates in combination with the Lagrange-mesh technique to compute the ground state energy, root mean square radius and the E1 strength distribution of $^6$He. We also introduce a three-body interaction to eliminate dependencies on the cutoff parameter of the two-body potentials on the ground state energy. The E1 strength distribution exhibits a low lying resonance as expected. However it is strongly influenced by the choice of the three-body EFT interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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