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arXiv 2001.02937nucl-th
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Skyrme能量密度泛函中张量分量的分解

Breakdown of the tensor component in the Skyrme energy density functional

J. M. Dong, X. L. Shang

摘要:

张量力作为强核力的重要组成部分,在少体系统和中子星中产生了许多有趣的效应。在平均场近似下,它对核子-核子关联起作用,因此,在本工作中,它对标准Skyrme能量密度泛函不起作用.因此,目前广泛使用的Skyrme的原始张量相互作用是无效的。作为一种替代策略,我们引入了一种中心交互作用,即,$\bm{σ}_{1}\cdot \bm{σ}_{2}$项,以改善实验单粒子结构的描述,并解决其影响,我们建立了两个Skyrme相互作用IMP 1和IMP 2补充校准的电荷破坏相互作用。中心$\bm{σ}_{1}\cdot \bm{σ}_{2}$相互作用的结果是大大提高了锡同位素和$N=82$同位素的壳演化的描述。

英文摘要:

The tensor force, as an important component of strong nuclear force, generates a variety of intriguing effects ranging from few-body systems to neutron stars. It is responsible for the nucleon-nucleon correlation beyond mean-field approximation, and is accordingly proved to play no role in the standard Skyrme energy density functionals in the present work. Therefore, the Skyrme's original tensor interaction that is extensively-employed presently is invalid. As an alternative strategy, we introduced a central interaction, i.e., the $\bm{σ}_{1}\cdot \bm{σ}_{2}$ term, to improve the description of experimental single-particle structure, and to address its effect, we established two Skyrme interactions IMP1 and IMP2 complemented by the calibrated charge-violating interactions. The central $\bm{σ}_{1}\cdot \bm{σ}_{2}$ interaction turns out to substantially improve the description of shell evolution in Sn isotopes and $N=82$ isotones.

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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