Lattice calculation of the semileptonic form factor at the end point forD→K*

Abstract
The axial form factor at q2=qmax2 (end point) for D→K* is reported: A1(qmax2)=1.23±0.16±0.31. Our lattice study of A1(qmax2) as a function of quark masses suggests an approximate onset of heavy-quark symmetry even for fairly light quark masses.