Lynn J E, Tews I, Carlson J, Gandolfi S, Gezerlis A, Schmidt K E, Schwenk A
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
Phys Rev Lett. 2016 Feb 12;116(6):062501. doi: 10.1103/PhysRevLett.116.062501. Epub 2016 Feb 9.
We present quantum Monte Carlo calculations of light nuclei, neutron-α scattering, and neutron matter using local two- and three-nucleon (3N) interactions derived from chiral effective field theory up to next-to-next-to-leading order (N(2)LO). The two undetermined 3N low-energy couplings are fit to the (4)He binding energy and, for the first time, to the spin-orbit splitting in the neutron-α P-wave phase shifts. Furthermore, we investigate different choices of local 3N-operator structures and find that chiral interactions at N(2)LO are able to simultaneously reproduce the properties of A=3,4,5 systems and of neutron matter, in contrast to commonly used phenomenological 3N interactions.
我们展示了使用从手征有效场论推导至次领头阶（N(2)LO）的局域两体和三体（3N）相互作用，对轻核、中子-α散射和中子物质进行的量子蒙特卡罗计算。两个未确定的3N低能耦合被拟合到（4）He的结合能，并且首次拟合到中子-α P波相移中的自旋轨道分裂。此外，我们研究了局域3N算符结构的不同选择，发现与常用的唯象3N相互作用相反，N(2)LO的手征相互作用能够同时再现A = 3、4、5系统以及中子物质的性质。
