A lattice estimate of the g_{D^* D pi} coupling

A. Abada; A. Le Yaouanc; D. Becirevic; G. Herdoiza; J.P. Leroy; J. Rodriguez-Quintero; O. Pene; Ph. Boucaud

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arxiv hep-lat/0209092 v1 pith:SQ55DDB4 submitted 2002-09-09 hep-lat hep-ph

A lattice estimate of the g_(D^* D pi) coupling

A. Abada , D. Becirevic , Ph. Boucaud , G. Herdoiza , J.P. Leroy , A. Le Yaouanc , O. Pene , J. Rodriguez-Quintero This is my paper

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keywords couplinglatticeagreementapproximationcleodeterminationdirectestimate

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We present the results of the first direct determination of the g_{D^* D pi} coupling using lattice QCD. From our simulations in the quenched approximation, we obtain g_{D^* 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.

A lattice estimate of the g_(D^* D pi) coupling

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