The Kaon B-parameter from Two-Flavour Dynamical Domain Wall Fermions

TL;DR

This paper presents a calculation of the kaon B-parameter using two-flavor dynamical domain wall fermions, providing insights into kaon mixing parameters with improved lattice techniques.

Contribution

The study introduces a new calculation of the kaon B-parameter employing two-flavor dynamical domain wall fermions on multiple ensembles with detailed quark mass variations.

Findings

Consistent B-parameter results across ensembles

Effective control of systematic uncertainties

Enhanced understanding of kaon mixing parameters

Abstract

We report on the calculation of the kaon B-parameter using two dynamical flavours of domain wall fermions. Our analysis is based on three ensembles of configurations, each consisting of about 5,000 HMC trajectories, with a lattice spacing of approximately 1.7 GeV for 16^3x32 lattices; dynamical quark masses range from approximately the strange quark mass to half of that. Both degenerate and non-degenerate quark masses are used for the kaons.