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arXiv 2201.01343hep-lat
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格点量子色动力学的超子谱

The hyperon spectrum from lattice QCD

Nolan Miller, Grant Bradley, M. A. Clark, Ben Hörz, Dean Howarth, Malcolm Lazarow, Henry Monge-Camacho, Amy Nicholson, Enrico Rinaldi, Pavlos Vranas, André Walker-Loud

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8 pages, 3 figures, presented at the 38th International Symposium on Lattice Field Theory (LATTICE2021)
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摘要：

超子衰变为结合实验测量从格点量子色动力学中提取$\vert V_{us} \vert$提供了一个很有前途的选择。目前，$\vert V_{us} \vert$是由K介子衰变宽度和相关形状因子的晶格计算确定的。在这篇论文中，我将介绍超子质谱的晶格决定的初步工作。我将另外总结未来的目标，其中我们将计算超子跃迁矩阵元素，这将提供一种访问$\vert V_{us} \vert$的替代方法。这项工作是基于SU（2）超子手征微扰理论的一个特定公式;确定这种有效场论收敛的程度有助于理解其预测能力的极限，特别是因为一些超子观测量在物理π质量附近很难计算（例如，超子到核子的形状因子），因此使用比物理π介子质量更重的质量，当与物理点的外推结合时，可能会产生更精确的结果。

英文摘要：

Hyperon decays present a promising alternative for extracting $\vert V_{us} \vert$ from lattice QCD combined with experimental measurements. Currently $\vert V_{us} \vert$ is determined from the kaon decay widths and a lattice calculation of the associated form factor. In this proceeding, I will present preliminary work on a lattice determination of the hyperon mass spectrum. I will additionally summarize future goals in which we will calculate the hyperon transition matrix elements, which will provide an alternative means for accessing $\vert V_{us} \vert$. This work is based on a particular formulation of SU(2) chiral perturbation theory for hyperons; determining the extent to which this effective field theory converges is instrumental in understanding the limits of its predictive power, especially since some hyperonic observables are difficult to calculate near the physical pion mass (e.g., hyperon-to-nucleon form factors), and thus the use of heavier than physical pion masses is likely to yield more precise results when combined with extrapolations to the physical point.}

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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