Effects of chiral three-nucleon forces on 4He-nucleus scattering in a wide range of incident energies
Effects of chiral three-nucleon forces on 4He-nucleus scattering in a wide range of incident energies
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手性三核子力对宽入射能量范围内 4He 核散射的影响
DOI：
10.1093/ptep/pty001
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发表时间：
2018
影响因子：
3.5
通讯作者：
Kohno Michio
中科院分区：
文献类型：
--
作者：
Toyokawa Masakazu;Yahiro Masanobu;Matsumoto Takuma;Kohno Michio
一个重要的当前课题是澄清手性三核子力（3NFs）的性质，不仅在核物质，而且在有限大小的核之间的散射。特别是对于弹性散射，这项研究才刚刚开始，对于大范围的入射能量（），其性质尚不清楚。采用brueckner - harree - fock方法研究了正能量核物质中手性3NFs的基本性质，并采用矩阵折叠模型（弹体质量数为$30 \underset{\raise0.3em\hbox{$ MeV）分析了手性3NFs对靶spb、Ni和ca在30 \underset{\raise0.3em\hbox{$ MeV范围内的he弹性散射影响。在具有正能量的对称核物质中，手性3NFs使单粒子势的吸引力降低，而吸收性增强。该效应主要来自于Fujita-Miyazawa 2-交换3NF，并随着增加而略微增大。这些效应持续存在于he散射的光势中。对于he散射的微分截面，在$E_{\rm in}/A_{\rm P} \underset{\raise0.3em\hbox{$ MeV处，手性- 3nf效应较大，提高了理论结果与实测结果的一致性。特别是对于$E_{\rm in}/A_{\rm P} \underset{\raise0.3em\hbox{$ MeV，折叠模型可以很好地再现测量的微分截面。通过考虑两种情况，研究了核物质和he散射的截止依赖关系。即使在mev下，来自依赖的不确定性也小于手性- 3nf效应。
An important current subject is to clarify the properties of chiral three-nucleon forces (3NFs) not only in nuclear matter but also in scattering between finite-size nuclei. Particularly for elastic scattering, this study has just started and the properties are not understood for a wide range of incident energies (). We investigate basic properties of chiral 3NFs in nuclear matter with positive energies by using the Brueckner–Hartree–Fock method with chiral two-nucleon forces at NLO and 3NFs at NNLO, and analyze the effects of chiral 3NFs onHe elastic scattering from targetsPb,Ni, andCa over a wide range of $30 \underset{\raise0.3em\hbox{$ MeV by using the-matrix folding model, whereis the mass number of the projectile. In symmetric nuclear matter with positive energies, chiral 3NFs make the single-particle potential less attractive and more absorptive. The effects mainly come from the Fujita–Miyazawa 2-exchange 3NF and become slightly larger asincreases. These effects persist in the optical potentials ofHe scattering. As for the differential cross sections ofHe scattering, chiral-3NF effects are large for $E_{\rm in}/A_{\rm P} \underset{\raise0.3em\hbox{$ MeV and improve the agreement of the theoretical results with the measured ones. Particularly for $E_{\rm in}/A_{\rm P} \underset{\raise0.3em\hbox{$ MeV, the folding model reproduces measured differential cross sections pretty well. Cutoff () dependence is investigated for both nuclear matter andHe scattering by considering two cases ofandMeV. The uncertainty coming from the dependence is smaller than chiral-3NF effects even atMeV.