论文标题
晶格QCD的超声频谱
The hyperon spectrum from lattice QCD
论文作者
论文摘要
超子衰减提供了一种有希望的替代方法，用于从晶状体QCD中提取$ \ vert v_ {us} \ vert $与实验测量相结合。当前，$ \ vert v_ {us} \ vert $是从kaon衰减宽度和关联外形尺寸的晶格计算确定的。在此程序中，我将介绍有关超子质谱的晶格确定的初步工作。我还将总结未来的目标，我们将计算超子过渡矩阵元素，这将为访问$ \ vert v_ {us} \ vert $提供另一种手段。这项工作基于SU（2）Hyperons的手性扰动理论的特定表述。确定这种有效的现场理论在多大程度上有助于理解其预测能力的极限，尤其是因为某些超声观察者很难在物理斜质质量附近计算（例如，超核形式的形式），因此，与物理胎质相比，当物理胎质量更重时，当与物理质量结合到物理质量时可能会产生更精确的结果。
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.}
