B_s and B_d mixing in full lattice QCD using NRQCD b quarks

TL;DR

This paper reports progress in calculating B_s and B_d meson mixing parameters using lattice QCD with NRQCD b quarks and asqtad light quarks, focusing on error reduction techniques.

Contribution

It introduces methods to reduce statistical and systematic errors in the ratio  = f_{B_s}_{B_d} _{B_s}/B_{B_d} using full lattice QCD simulations.

Findings

Progress in calculating mixing parameters with reduced errors.

Implementation of error reduction techniques in lattice QCD.

Analysis of effects of sea quarks on mixing ratios.

Abstract

We give a progress report on studies of B_s and B_d mixing with valence NRQCD b quarks and asqtad light quarks on the MILC configurations including the effect of 2+1 flavours of sea quarks. We explore methods for reducing statistical and systematic errors in the ratio \xi = f_{B_s}\sqrt{B_{B_s}}/f_{B_d}\sqrt{B_{B_d}}.