41 research outputs found
Finite Temperature Lattice QCD with Clover Fermions
We report on our simulation of finite temperature lattice QCD with two
flavors of Symanzik-improved fermions and
Symanzik-improved glue. Our thermodynamic simulations were performed on an lattice, and we have performed complementary zero temperature
simulations on an lattice. We compare our results to those from
simulations with two flavors of Wilson fermions and discuss the improvement
resulting from use of the improved action.Comment: 3 pages, 4 figures, Talk presented at Lattice 9
Exotic hybrid mesons with light quarks
Hybrid mesons, made from a quark, an antiquark and gluons, can have quantum
numbers inaccessible to conventional quark-antiquark states. Confirmation of
such states would give information on the role of "dynamical" color in low
energy QCD. We present preliminary results for hybrid meson masses using light
Wilson valence quarks.Comment: 4 pages, 4 figures, Talk presented at LATTICE96(spectrum
Heavy-light decay constants---MILC results with the Wilson action
We present the current status of our ongoing calculations of pseudoscalar
meson decay constants for mesons that contain one light and one heavy quark
(f_B, f_{B_s}, f_D, f_{D_s}). We are currently generating new gauge
configurations that include dynamical quarks and calculating the decay
constants. In addition, we have several new results for the static
approximation. Those results, as well as several refinements to the analysis,
are new since Lattice '96. Our current (still preliminary) value for f_B is 156
+- 11 +- 30 +- 14 MeV, where the first error is from statistical and fitting
errors, the second error is an estimate of other systematic errors within the
quenched approximation and the third error is an estimate of the quenching
error. For the ratio f_{B_s}/f_B, we get 1.11 +- 0.02 +- 0.03 +- 0.07.Comment: 8 pages, 9 figures, LaTeX, uses espcrs2, epsf, Invited talk presented
by S. Gottlieb at Lattice QCD on Parallel Computers, University of Tsukuba,
March, 1997, to appear in the proceeding
Light hadron spectrum---MILC results with the Kogut-Susskind and Wilson actions
We present the current status of our ongoing calculations of the light hadron
spectrum with both Kogut-Susskind (KS) and Wilson quarks in the valence or
quenched approximation. We discuss KS quarks first and find that the chiral
extrapolation is potentially the biggest source of systematic error. For the
Wilson case, we focus on finite volume and source size effects at 6/g^2=5.7. We
find no evidence to support the claim that there is a finite volume effect
between N_s=16 and 24 of approximately 5%.Comment: 11 pages, 11 figures, LaTeX, uses espcrs2, epsf, Invited talk
presented by S. Gottlieb at Lattice QCD on Parallel Computers, University of
Tsukuba, March, 1997, to appear in the proceeding
Scaling tests of the improved Kogut-Susskind quark action
Improved lattice actions for Kogut-Susskind quarks have been shown to improve
rotational symmetry and flavor symmetry. In this work we find improved scaling
behavior of the rho and nucleon masses expressed in units of a length scale
obtained from the static quark potential, and better behavior of the Dirac
operator in instanton backgrounds.Comment: 4 pages, 4 figures, Revte
Quenched hadron spectroscopy with improved staggered quark action
We investigate light hadron spectroscopy with an improved quenched staggered
quark action. We compare the results obtained with an improved gauge plus an
improved quark action, an improved gauge plus standard quark action, and the
standard gauge plus standard quark action. Most of the improvement in the
spectroscopy results is due to the improved gauge sector. However, the improved
quark action substantially reduces violations of Lorentz invariance, as
evidenced by the meson dispersion relations.Comment: New references adde
Recommended from our members
Oregon's bounty of horticultural crops & landscapes
Oregon has a rich history in the production of fruits, berries, vegetables, and ornamental crops; the state’s national and international reputation for delivering high-quality products is well-established and well-deserved. In the past, agriculture and forestry were the foundation of Oregon’s economy. Although other activities now are equal in size to these land-based enterprises, agriculture continues to make a significant contribution to Oregon’s economic well-being. Oregon agriculture has not been immune to the impacts of economic globalization. Production, processing, marketing technologies, and the American palate are changing rapidly. More than ever before, producers, processors, and marketers link their success in agriculture
to creativity and entrepreneurism.Published December 2009. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalogKeywords: horticultural crops, landscapes, agricultural estimates, Orego
Australian Quarries, Wollongong
Deposit Z638 consists of photographic proofs arranged in 75 albums illustrating all types of company activities, personnel, social and sporting events, refineries and factories, Mount Newman opening, bulk sugar terminals, aerial views of mills and refine
Australian Quarries, Wollongong
Deposit Z638 consists of photographic proofs arranged in 75 albums illustrating all types of company activities, personnel, social and sporting events, refineries and factories, Mount Newman opening, bulk sugar terminals, aerial views of mills and refine