We present an update of results from the HPQCD collaboration on charm physics using the Highly Improved Staggered Quark action. This includes a precise de termination ofmc using moments of current-current correlators combined with high-order c ontinuum QCD perturbation theory. We also include an update on the determination of αs rom lattice QCD, preliminary results on the determination ofmb and a summary plot of the status of the gold-plated meson spec trum. There is an appendix on tackling systematic errors in fitting using the Bayesian approach.

We present an update of results from the HPQCD collaboration on charm physics using the Highly Improved Staggered Quark action. This includes a precise determination of m c using moments of current-current correlators combined with high-order continuum QCD perturbation theory. We also include an update on the determination of a s from lattice QCD, preliminary results on the determination of m b and a summary plot of the status of the gold-plated meson spectrum. There is an appendix on tackling systematic errors in fitting using the Bayesian approach.

We present an update of results from the HPQCD collaboration on charm physics using the Highly Improved Staggered Quark action. This includes a precise determination of m_c using moments of current-current correlators combined with high-order continuum QCD perturbation theory. We also include an update on the determination of alpha_s from lattice QCD, preliminary results on the determination of m_b and a summary plot of the status of the gold-plated meson spectrum. There is an appendix on tackling systematic errors in fitting using the Bayesian approach.

Emel Dalgic ab, Kit Wongc, Christine Daviesc, Eduardo Follanad,Alistair Harte,Ron Horgan f , Peter Lepageg, Quentin Mason f , Junko Shigemitsud, Howard Trottiera and Jackson Wub aSimon Fraser University, Burnaby BC, Canada V5A 1S6 bTRIUMF, Vancouver BC, Canada V6T 2A3 cUniversity of Glasgow, Glasgow, UK G12 8QQ dThe Ohio State University, Columbus OH, USA 43210 eUniversity of Edinburgh, Edinburgh, UK EH9 3JZ f University of Cambridge, Cambridge, UK CB3 0HE gCornell University, Ithaca NY, USA 14853

We determine hadronic matrix elements relevant for the mass and width differences, Delta M-s and Delta Gamma(s), in the B-s(0)-(B) over bar (0)(s) meson system using fully unquenched lattice QCD. We employ the MILC Collaboration gauge configurations that include u, d, and s sea quarks using the improved staggered quark (AsqTad) action and a highly improved gluon action. We implement the valence s quark also with the AsqTad action and use nonrelativistic QCD for the valence b quark. For the nonperturbative QCD input into the standard model expression for Delta M-s we find f(Bs)root(B) over bar (Bs)=0.281(21) GeV. Results for four-fermion operator matrix elements entering standard model formulas for Delta Gamma(s) are also presented.

s meson system using fully unquenched lattice QCD. We employ the MILC collaboration gauge configurations that include u, d and s sea quarks using the improved staggered quark (AsqTad) action and a highly improved gluon action. We implement the valence s quark also with the AsqTad action and use NonRelativistic QCD for the valence b quark. For the nonperturbative QCD input into the Standard Model expression forMs we find fBs p ˆ BBs = 0.281(21)GeV. Results for four- fermion operator matrix elements entering Standard Model formulas fors are also presented.