The 39th International Symposium on Lattice Field Theory (Lattice 2022)

The continuum limit with various discretized fermion actions

9 Aug 2022, 18:10

20m

CP1-HSZ/0.010 (CP1-HSZ) - HS2 (CP1-HSZ)

Oral Presentation Hadron Spectroscopy and Interactions

Speaker

Dianjun Zhao (Institute of Theoretical Physics, Chinese Academy of Sciences)

Description

We present the leading order mixed-action effect ${\mathrm{\Delta }}_{\mathrm{m}\mathrm{i}\mathrm{x}}\equiv m_{\pi ,\mathrm{v}\mathrm{s}}^2-\frac{m_{\pi ,\mathrm{v}\mathrm{v}}^2+m_{\pi ,\mathrm{s}\mathrm{s}}^2}{2}$ using HISQ,
clover or overlap valence fermion actions on the gauge ensembles with kinds of
sea fermion actions among a widely used lattice spacing range $a\in [0.04,0.19]$~fm. The results suggest that ${\mathrm{\Delta }}_{\mathrm{m}\mathrm{i}\mathrm{x}}$ decreases on the forth order
of the lattice spacing on the gauge ensembles with the dynamical chiral sea
fermion, likes the Domain wall or HISQ fermion. When the clover sea fermion
action which has explicit chiral symmetry breaking is used in the ensemble, ${\mathrm{\Delta }}_{\mathrm{m}\mathrm{i}\mathrm{x}}$ can be much larger regardless of the valence fermion action
used.

Presentation materials

Lattice2022.pdf