DPF99 - Light Hadron Spectrum and Heavy-light Decay Constants from the MILC Collaboration

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Author: MILC Collaboration: C. Bernard, T. DeGrand, C. DeTar, Steven Gottlieb, Urs M. Heller, J. E. Hetrick, N. Ishizuka, C. McNeile, K. Rummukainen, R. Sugar, D. Toussaint, M.~Wingate

Title: Light Hadron Spectrum and Heavy-light Decay Constants from the MILC Collaboration

Abstract: The light hadron spectrum in the continuum limit with staggered quarkshas recently been computed in both the quenched approximation and withtwo flavors of dynamical quarks. Over a range of quark mass, a significantdifference between the quenched and dynamical theoriesis observed for the nucleon to vector meson mass ratio.Decay constants for the $B$ and $B_s$ mesons are crucial for the accuratedetermination of the CKM mixing matrix. We have calculated several decayconstants in the continuum limit within the quenched approximation.In addition, we have used two gauge couplings and a variety of dynamicalstaggered quark masses to address the effects of full QCD dynamics for thedecay constants.

Comments: 6 pages, RevTeX, epsf.sty, 4 figures, contribution to DPF99

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DPF99