标题： 量子色动力学中的超子-核子相互作用与密集核物质的组成 显示英文标题

标题： Hyperon-Nucleon Interactions and the Composition of Dense Nuclear Matter from Quantum Chromodynamics

摘要： 低能中子与Sigma^-相互作用在一定程度上决定了奇异夸克在密集物质中的作用，例如存在于天体物理环境中的物质。 此系统的散射相移是通过使用格点QCD技术对QCD路径积分进行数值计算得到的。 我们的计算是在两个较大的晶格体积和一个晶格间距下，以pion质量m_pi约为389 MeV进行的，并利用有效场论外推到物理pion质量。 从QCD确定的相互作用与从超子-核子实验数据提取的相互作用在不确定性范围内一致，并加强了理论论据，即奇异夸克是密集核物质的关键组成部分。 显示英文摘要

摘要： The low-energy neutron-Sigma^- interactions determine, in part, the role of the strange quark in dense matter, such as that found in astrophysical environments. The scattering phase shifts for this system are obtained from a numerical evaluation of the QCD path integral using the technique of Lattice QCD. Our calculations, performed at a pion mass of m_pi ~ 389 MeV in two large lattice volumes, and at one lattice spacing, are extrapolated to the physical pion mass using effective field theory. The interactions determined from QCD are consistent with those extracted from hyperon-nucleon experimental data within uncertainties, and strengthen theoretical arguments that the strange quark is a crucial component of dense nuclear matter.