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arXiv 1402.0965nucl-th
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具有相容两体和三体手征微扰相互作用的核物质状态方程

The nuclear matter equation of state with consistent two- and three-body perturbative chiral interactions

L. Coraggio, J. W. Holt, N. Itaco, R. Machleidt, L. E. Marcucci, F. Sammarruca

摘要:

本文从手征N3 LO(next-to-next-to-next-to-leading order)二体势和N2 LO三体力出发,计算了无限对称核物质的每粒子能量.拟合了不受两体观测约束的手征三核子力的低能常数,再现了triton结合能和3 H-3 He的Gamow-Teller跃迁矩阵元.这样,核物质的饱和性质在一个无参数的方法再现。状态方程计算到三阶多体微扰理论,特别强调的作用,三阶粒子-空穴图。这些结果的截止尺度和调节器功能的依赖性进行了研究。我们发现,包括三个核子力与应用的两个核子相互作用一致,导致减少依赖的调节器的选择,只有较低的值的截止。

英文摘要:

We compute the energy per particle of infinite symmetric nuclear matter from chiral N3LO (next-to-next-to-next-to-leading order) two-body potentials plus N2LO three-body forces. The low-energy constants of the chiral three-nucleon force that cannot be constrained by two-body observables are fitted to reproduce the triton binding energy and the 3H-3He Gamow-Teller transition matrix element. In this way, the saturation properties of nuclear matter are reproduced in a parameter-free approach. The equation of state is computed up to third order in many-body perturbation theory, with special emphasis on the role of the third-order particle-hole diagram. The dependence of these results on the cutoff scale and regulator function is studied. We find that the inclusion of three-nucleon forces consistent with the applied two-nucleon interaction leads to a reduced dependence on the choice of the regulator only for lower values of the cutoff.

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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