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Ds 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

hep-latarXiv:hep-lat/0310045

Abstract

We present preliminary results for the Ds 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'' a2 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 Ds system.

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