The 33rd International Symposium on Lattice Field Theory (Lattice 2015)

Computing the long-distance contributions to $\epsilon_K$

17 Jul 2015, 15:00

20m

406 (Kobe International Conference Center)

Talk Weak Decays and Matrix Elements Weak Decays and Matrix Elements

Speaker

Prof. Norman Christ (Columbia University)

Description

We will discuss the theoretical framework and initial results for the lattice QCD calculation of the long-distance contributions to $\epsilon_K$, the measure of indirect CP violation in $K_L$ decay. A proof-of-principle calculation has been carried out on a $24^3\times 64$ lattice volume with an inverse lattice spacing of 1.73 GeV and pion mass of 329 MeV. A complete calculation will be described which shows how the logarithmically divergent lattice contribution can be combined with continuum perturbation theory to obtain a physical result.

Presentation materials

Slides

NChrist.pdf