First lattice QCD estimate of the g_{D^* D pi} coupling
  We present the results of the first lattice QCD study of the strong coupling g_{D^* D pi}. From our simulations in the quenched approximation, we obtain g_{D^* D pi} = 18.8 +/- 2.3^{+1.1}_{-2.0} and hat(g)_c = 0.67 +/- 0.08^{+0.04}_{-0.06}. Whereas previous theoretical studies gave different predictions, our result favours a large value for hat(g)_c. It agrees very well with the recent experimental value by CLEO. hat(g) varies very little with the heavy mass and we find in the infinite mass limit hat(g)_infinity = 0.69(18). 
A. Abada, D. Becirevic, Ph. Boucaud, G. Herdoiza, J.P. Leroy, A. Le   Yaouanc, O. Pene, J. Rodr\'iguez-Quintero