Mon·Oct 20, 2003Monday·October 20, 2003

1. 01*

   D_s spectrum and leptonic decays with Fermilab heavy quarks and improved staggered light quarks

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

   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.

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

   Propagating spinors on a tetrahedral spacetime lattice

   Brendan Z. Foster🇺🇸 · Ted Jacobson🇺🇸

   We derive a discrete path integral for massless fermions on a hypercubic spacetime lattice with null faces. The amplitude for a path with N steps and B bends is +/- (1/2)^N (i/sqrt{3})^B.

   ↳ hep-thgr-qchep-latmath-ph+22 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.