Hyperon-nucleon interactions from quantum chromodynamics and the composition of dense nuclear matter.
Hyperon-nucleon interactions from quantum chromodynamics and the composition of dense nuclear matter.
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DOI：
10.1103/physrevlett.109.172001
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发表时间：
2012-04
影响因子：
8.6
通讯作者：
S. Beane;E. Chang;Saul D. Cohen;W. Detmold;W. Detmold;W. Detmold;Huey-Wen Lin;T. Luu;K. Orginos;K. Orginos;A. Parreño;M. Savage;A. Walker-Loud;A. Walker-Loud
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文献类型：
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作者：
S. Beane;E. Chang;Saul D. Cohen;W. Detmold;W. Detmold;W. Detmold;Huey-Wen Lin;T. Luu;K. Orginos;K. Orginos;A. Parreño;M. Savage;A. Walker-Loud;A. Walker-Loud
低能nΣ(-)相互作用在一定程度上决定了奇异夸克在致密物质中的作用，例如在天体物理环境中发现的物质。利用格子QCD技术对QCD路径积分进行了数值计算，得到了该系统的散射相移。我们的计算是在两个大的晶格体积和一个晶格间距的m(π)~389 MeV的介子质量下进行的，并用有效场论外推到了物理的介子质量。从晶格QCD确定的相互作用在不确定范围内与从超子-核子实验数据中提取的相互作用是一致的，并加强了依赖于模型的理论论点，即奇异夸克是致密核物质的关键成分。
The low-energy nΣ(-) 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(π)~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 lattice QCD are consistent with those extracted from hyperon-nucleon experimental data within uncertainties and strengthen model-dependent theoretical arguments that the strange quark is a crucial component of dense nuclear matter.