A lattice estimate of the gD* D pi coupling
A. Abada, D. Becirevic, Ph. Boucaud, G. Herdoiza, J. P. Leroy, A. Le Yaouanc, O. Pene, J. Rodriguez-Quintero
Abstract
We present the results of the first direct determination of the gD* D pi coupling using lattice QCD. From our simulations in the quenched approximation, we obtain gD* D pi = 18.8 +/- 2.3+1.1-2.0 and hat(g) = 0.67 +/- 0.08+0.04-0.06. It is in agreement with a recent experimental result from CLEO.
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