36th Annual International Symposium on Lattice Field Theory

Jul 22 – 28, 2018
Kellogg Hotel and Conference Center
EST timezone

Kaon Matrix Elements from Coarse Lattices

Jul 26, 2018, 11:00 AM
20m
103 (Kellogg Hotel and Conference Center)

103

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Weak Decays and Matrix Elements

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)

 Slides