Hadronic coupling constants of $g_{\sigma\pi\pi}$ in lattice QCD
- Resource Type
- Working Paper
- Authors
- Wang, Lingyun; Fu, Ziwen; Chen, Hang
- Source
- Subject
- High Energy Physics - Lattice
- Language
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.
Comment: Submitted to Chinese Physics C