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arXiv 1702.08337hep-lat
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格点量子色动力学中$g_{σππ}$的强子耦合常数

Hadronic coupling constants of $g_{σππ}$ in lattice QCD

Lingyun Wang, Ziwen Fu, Hang Chen

摘要:

我们仅用相应的三点函数研究了强子衰变$σ\toππ$的耦合常数$g_{σππ}$,并采用具有良好信噪比的移动壁源技术计算了该三点函数.模拟是在$40^3\times96$ MILC规范位形上进行的,该规范位形具有“Asqtad”改进的交错动力学海夸克的$N_f=2+1$味道,格间距为$a \approx 0.09$ fm。我们对这个给定的MILC精细格点规范系综$g_{σππ}=2.71(42)$ GeV的估计值。

英文摘要:

We investigate the coupling constant $g_{σππ}$ for the hadronic decay $σ\toππ$ only using the relevant three-point function, which is evaluated by the moving-wall source technique with a pretty good noise-to-signal ratio. This simulation is carried out on a $40^3\times96$ MILC gauge configuration with $N_f=2+1$ flavor of the "Asqtad" improved staggered dynamical sea quarks at the lattice spacing $a \approx 0.09$ fm. Our estimated value for this given MILC fine lattice gauge ensemble $g_{σππ}=2.71(42)$ GeV.

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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