Hadronic coupling constants of $g_{\sigma\pi\pi}$ in lattice QCD

Lingyun Wang; Ziwen Fu; Hang Chen

Hadronic coupling constants of $g_{\sigma\pi\pi}$ in lattice QCD

High Energy Physics - Lattice 2017-02-28 v1

Authors: Lingyun Wang , Ziwen Fu , Hang Chen

Abstract

We investigate the coupling constant $g_{\sigma\pi\pi}$ for the hadronic decay $\sigma\to\pi\pi$ 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 $g_{\sigma\pi\pi}=2.71(42)$ GeV.

Keywords

lattice QCD hadronic coupling constant sigma meson decay three-point function moving-wall source MILC gauge configuration staggered quarks

Cite

@article{arxiv.1702.08337,
  title  = {Hadronic coupling constants of $g_{\sigma\pi\pi}$ in lattice QCD},
  author = {Lingyun Wang and Ziwen Fu and Hang Chen},
  journal= {arXiv preprint arXiv:1702.08337},
  year   = {2017}
}

Comments

Submitted to Chinese Physics C

Hadronic coupling constants of $g_{\sigma\pi\pi}$ in lattice QCD

Abstract

Keywords

Cite

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