Phys. Rev. D 66, 074504 (2002) [10 pages]First lattice QCD estimate of the gD*Dπ couplingReceived 25 June 2002; published 17 October 2002 We present the results of the first lattice QCD study of the strong coupling gD*Dπ. From our simulations in the quenched approximation, we obtain gD*Dπ=18.8±2.3-2.0+1.1 and gc=0.67±0.08-0.06+0.04. Whereas previous theoretical studies gave different predictions, our result favors a large value for gc. It agrees very well with the recent experimental value by CLEO. ĝ varies very little with the heavy mass and we find in the infinite mass limit g∞=0.69(18). © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.66.074504
DOI:
10.1103/PhysRevD.66.074504
PACS:
12.38.Gc, 13.75.Lb
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