Fri·Oct 17, 2003Friday·October 17, 2003

1. 01*

   Results on improved KS dynamical configurations: spectrum, decay constants, etc

   Steven Gottlieb (Indiana University)🇺🇸

   The MILC Collaboration has been producing ensembles of lattice configurations with three dynamical flavors for the past few years. There are now results for three lattice spacings for a variety of light and strange quark masses, ranging down to $m_l=0.1m_s$, where $m_s$ is the dynamical strange quark mass and $m_l$ is the common mass of the $u$ and $d$ quarks. Recently, the Fermilab, HPQCD, MILC and UKQCD collaborations have presented a summary of results obtained using these lattices. Compared with quenched results, these new calculations show great improvement in agreement with experiment. This talk addresses the technical improvements that make these calculations possible and provides additional details of calculations not presented in the initial summary. We demonstrate that a wide range of hadronic observables can now be calculated to 2--3% accuracy.

   hep-latNucl.Phys.B Proc.Suppl.(2004)·26 citations
2. 02*

   Properties of charmonium in lattice QCD with 2+1 flavors of improved staggered sea quarks

   Massimo di Pierro🇺🇸 · Aida X. El-Khadra🇺🇸 · Steven Gottlieb🇺🇸 · Andreas S. Kronfeld🇺🇸 · Paul B. Mackenzie🇺🇸 · Damian P. Menscher🇺🇸 · Mehmet B. Oktay🇺🇸 · Masataka Okamoto🇯🇵 · James N. Simone🇺🇸

   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.

   hep-latNucl.Phys.B Proc.Suppl.(2004)·35 citations
3. 03*

   Recent Developments of Domain-wall/Overlap Fermions for Lattice QCD

   Ting-Wai Chiu🇹🇼

   I review the lattice formulations of vector-like gauge theories (e.g. QCD) with domain-wall/overlap fermions, and discuss how to optimize the chiral symmetry for any finite $N_s$ (sites in the fifth dimension). In this formulation, quark propagators in gauge background can be computed efficiently through the effective 4D lattice Dirac operator.

   hep-lathep-phhep-thNucl.Phys.B Proc.Suppl.(2004)·31 citations
4. 04*

   Higher-order perturbation theory for highly-improved actions

   Howard D. Trottier🇨🇦

   I review techniques and applications of higher-order perturbation theory for highly-improved lattice actions.

   hep-latNucl.Phys.B Proc.Suppl.(2004)·31 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.