标题： 核晶格模拟与手征有效场理论 显示英文标题

标题： Nuclear Lattice Simulations with Chiral Effective Field Theory

摘要： 我们通过结合手征有效场论与非微扰格点方法来研究核物质和中子物质。 在我们的方法中，核子和介子被当作格点上的点粒子处理。 这使我们能够探测比格点QCD更大的体积、更低的温度和更高的核密度。 这些粒子的低能相互作用由手征有效理论支配，算符系数通过拟合零温下的少体散射数据确定。 对格点间距的任何依赖都可以通过重整化群来理解，并通过重整化算符系数来吸收。 这样，我们实现了没有自由参数的多体核现象的现实模拟，具有系统展开和与QCD清晰的理论联系。 我们给出了温度在20到40 MeV之间且密度低于两倍核物质密度的热中子物质的结果。 显示英文摘要

摘要： We study nuclear and neutron matter by combining chiral effective field theory with non-perturbative lattice methods. In our approach nucleons and pions are treated as point particles on a lattice. This allows us to probe larger volumes, lower temperatures, and greater nuclear densities than in lattice QCD. The low energy interactions of these particles are governed by chiral effective theory and operator coefficients are determined by fitting to zero temperature few-body scattering data. Any dependence on the lattice spacing can be understood from the renormalization group and absorbed by renormalizing operator coefficients. In this way we have a realistic simulation of many-body nuclear phenomena with no free parameters, a systematic expansion, and a clear theoretical connection to QCD. We present results for hot neutron matter at temperatures 20 to 40 MeV and densities below twice nuclear matter density.