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arXiv 1302.2987hep-lat
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格点量子色动力学中核子本征态的结构和流动

Structure and Flow of the Nucleon Eigenstates in Lattice QCD

M. Selim Mahbub, Waseem Kamleh, Derek B. Leinweber, Peter J. Moran, Anthony G. Williams

摘要:

本文在全QCD中用2+1味PACS-CS规范位形确定了核子的激发能本征态$s=c{1}{2}$,$I={1}{2}$,$N^{\pm}$。相关矩阵法的使用和建立使用标准的核子插值器,采用涂抹在费米子源和汇。我们开发和展示了一种新的技术,允许获得的本征向量被用来跟踪传播的能量状态的内在性质从一个夸克质量到下一个。这种方法是特别有用的更大的维度的相关矩阵,更多的近简并的能量状态可以出现在频谱中。

英文摘要:

A determination of the excited energy eigenstates of the nucleon, $s=c{1}{2}$, $I={1}{2}$, $N^{\pm}$, is presented in full QCD using 2+1 flavor PACS-CS gauge configurations. The correlation-matrix method is used and is built using standard nucleon interpolators employing smearings at the fermion sources and sinks. We develop and demonstrate a new technique that allows the eigenvectors obtained to be utilized to track the propagation of the intrinsic nature of energy-states from one quark mass to the next. This approach is particularly useful for larger dimension correlation matrices where more near-degenerate energy-states can appear in the spectrum.

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