Speaker
Prof.
Robert Mawhinney
(Columbia University)
Description
The RBC and UKQCD Collaborations have generated a number
of coarse ensembles with 2+1 flavors of Mobius Domain Wall Fermions
(MDWF) and physical quark masses using the Iwasaki plus Dislocation
Suppressing Determinant Ratio (DSDR) action. Previous work has
shown small $O(a^2)$ scaling violations for pseudoscalar decay
constants, various masses and Wilson flow scales. In this talk,
we present results for $B_K$ and $\Delta I = 2$ $K \to \pi \pi$
matrix elements on these lattices and compare these to continuum limit
results obtained for 2+1 flavor lattices with the Iwasaki gauge
action. The scaling of these matrix elements will help to determine
the utility of measuring $\Delta I = 0$ $K \to \pi \pi$ matrix
elements on lattices as coarse as $1/a = 1$ GeV.
Primary author
Prof.
Robert Mawhinney
(Columbia University)
Co-author
Jiqun Tu
(Columbia)