B_s and B_d mixing in full lattice QCD using NRQCD b quarks
arXiv:0710.0646
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 ξ= f_{B_s}\sqrt{B_{B_s}}/f_{B_d}\sqrt{B_{B_d}}.
7 pages, talk at The XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg,