166 research outputs found
Charmonium spectrum from quenched QCD on anisotropic lattices
Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 2843, 2002.3.25Includes bibliographical reference
D_s spectrum and leptonic decays with Fermilab heavy quarks and improved staggered light quarks
We present preliminary results for the D_s meson spectrum and decay constants
in unquenched lattice QCD. Simulations are carried out with 2+1 dynamical
quarks using gauge configurations generated by the MILC collaboration. We use
the ``asqtad'' a^2 improved staggered action for the light quarks, and the
clover heavy quark action with the Fermilab interpretation. We compare our
spectrum results with the newly discovered 0+ and 1+ states in the D_s system.Comment: 3pp. Presented at 21st International Symposium on Lattice Field
Theory (LATTICE 2003), Tsukuba, Ibaraki, Japan, 15-19 Jul 200
Properties of charmonium in lattice QCD with 2+1 flavors of improved staggered sea quarks
We use the dynamical gluon configurations provided by the MILC collaboration
in a study of the charmonium spectrum and psi leptonic width. We examine sea
quark effects on mass splitting and on the leptonic decay matrix element for
light masses as low as m_s/5, while keeping the strange quark mass fixed and
the lattice spacing nearly constant.Comment: Lattice2003(heavy
Semileptonic decays of mesons in unquenched lattice QCD
We present our preliminary results for semileptonic form factors of
mesons in unquenched lattice QCD. Simulations are carried out with
dynamical quarks using gauge configurations generated by the MILC
collaboration. For the valence quarks, we adopt an improved staggered light
quark action and the clover heavy quark action. Our results for and
form factors at are in agreement with the experimental
values.Comment: Lattice2003(heavy), 3 page
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