S. Aoki et al., HEAVY-QUARK MASS DEPENDENCE OF SEMILEPTONIC FORM-FACTORS FOR B-DECAY, Nuclear physics. B, Proceedings supplement, 63, 1998, pp. 380-382
We present our study of the dependence of the heavy-to-light semilepto
nic B decay form factors on the heavy-light meson mass M-PS. Simulatio
ns are made over a range of the heavy quark mass covering both the cha
rm and bottom quarks using the O(a)-improved clover action at beta = 5
.9 on a 16(3) x 40 and 24(3) x 64 lattice. We find that a weak depende
nce of form factors on M-PS observed in previous studies in the region
of charm quark persists up to the region of b quark. The soft pion re
lation f(0)(q(max)(2)) = f(B)/f(pi) is examined and found to be largel
y violated.