389 research outputs found
B -> pi l nu at three lattice spacings
The increasing accuracy of experimental results for the exclusive,
semileptonic decay B -> pi l nu requires a similarly accurate calculation of
the hadronic matrix elements, to determine |Vub|. We present preliminary
results for the form factors of the B to light meson decay mode. Using results
from three lattices in the range 5.7 <= beta <= 6.1 we study the dependence on
the lattice spacing.Comment: LATTICE98(heavyqk), LaTeX, 3 pages, 4 postscript figures, uses
espcrc2.st
Wave functions and their use in spectroscopy and phenomenology
We describe the calculation of Coulomb gauge wave functions for light quark
systems, and their use as interpolating fields for excited state spectroscopy.Comment: 4 pages latex with lat92 macro plus 4 postscript figs, COLO-HEP-29
Charmed hadron physics in quenched anisotropic lattice QCD
We investigate the anisotropic lattice with improved quark action as a
candidate of framework in which we can treat both the heavy and light quark
region in the same manner and systematically reduce the systematic
uncertainties. To examine applicability of anisotropic lattice, we calculate
the charmed meson spectrum and decay constants in quenched approximation. We
find consistent result with most advanced results on isotropic lattices.Comment: 3 pages, 1 figure, contribution to Fifth KEK Topical Conference -
Frontiers in Flavor Physics -, Tsukuba, Japan, November 20-22, 200
Heavy-light meson in anisotropic lattice QCD
We examine whether the improved quark action on anisotropic lattices
can be used as a framework for the heavy quark, which enables precision
computation of matrix elements of heavy-light mesons. To this end, it is
crucial to verify that a mass independent and nonperturbative tuning of the
parameters is possible. As a first step, we observe the dispersion relation of
heavy-light mesons on a quenched lattice using the action which is
nonperturbatively tuned only for the leading terms. On a lattice with the
spatial cutoff 1.6 GeV and the anisotropy , the
relativity relation holds within 2% accuracy in the quark mass region with the bare anisotropy parameter tuned for the massless quark.
We also apply the action to a calculation of heavy-light decay constants in the
charm quark mass region.Comment: Lattice2002(heavyquark), 3 pages, 2 figure
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