M. B. Oktay

B- and D-meson decay constants from three-flavor lattice QCD

We calculate the leptonic decay constants ofB (s) andD (s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light meson correlation functions on the MILC asqtad-improved staggered gauge congurations which include the eects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ms=10) and at three lattice spacings (a 0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory and higher-order terms are expected to be small. We obtain f B+ = 196:9(8:9) MeV, fBs = 242:0(9:5) MeV, f D+ = 218:9(11:3) MeV, fDs = 260:1(10:8) MeV, and the SU(3) avor-breaking ratios fBs =fB = 1:229(26) and fDs =fD = 1:188(25), where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.

Charmonium at high temperature in two-flavor QCD

We compute charmonium spectral functions in 2-flavor QCD on anisotropic lattices using the maximum entropy method. Our results suggest that the S-waves (

What happens to the Upsilon and ηb in the quark-gluon plasma? Bottomonium spectral functions from lattice QCD

J/\ensuremath{\psi}

Refining new-physics searches in B→Dτν with lattice QCD.

and

Scaling studies of QCD with the dynamical highly improved staggered quark action

{\ensuremath{\eta}}_{c}

Bottomonium above Deconfinement in Lattice Nonrelativistic QCD

) survive up to temperatures close to

S wave bottomonium states moving in a quark-gluon plasma from lattice NRQCD

2{T}_{c}

Erratum: B s→D s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ +μ -)

, while the P-waves (

Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ

{\ensuremath{\chi}}_{c0}

Visualization of semileptonic form factors from lattice QCD

and