Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1992-11-17
Nucl.Phys.Proc.Suppl. 30 (1993) 389-392
Physics
High Energy Physics
High Energy Physics - Lattice
at Lattice '92, 4 pages latex + 3 postscript figures, Edinburgh Preprint 92/518
Scientific paper
We present preliminary results for the spectrum and decay matrix elements for heavy-light and heavy-heavy mesons, obtained on the 64-node Meiko Computing Surface at the University of Edinburgh. Quark propagators are computed with an O(a)-improved fermion action on 24^3x48 lattices at beta = 6.2, using three values of the quark mass up to around the strange quark mass, and four values of the quark mass in the region of the charm quark mass. We compare results for the hyperfine splitting in charmonium with those obtained using the conventional Wilson fermion action and find that the splitting is 1.83(15) times larger with the improved action. Our measurements of f_B indicate non-scaling corrections of the order of 20% to the Heavy Quark Effective Theory expectation. A comparison is made with results obtained on 16^3x48 lattices at beta = 6.0.
David Richards presented by
UKQCD Collaboration
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