Speaker
Dianjun Zhao
(Institute of Theoretical Physics, Chinese Academy of Sciences)
Description
We present the leading order mixed-action effect $\Delta_{\rm mix}\equiv m_{\pi,{\rm vs}}^2-\frac{m_{\pi,{\rm vv}}^2+m_{\pi,{\rm ss}}^2}{2}$ 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 $\Delta_{\rm mix}$ 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, $\Delta_{\rm mix}$ can be much larger regardless of the valence fermion action
used.
Primary author
Dianjun Zhao
(Institute of Theoretical Physics, Chinese Academy of Sciences)
