A simply modified single pole scenario for B→K* form factors

We revisit the form factors of B→K* by using the heavy quark limit and large energy limit, assuming that the form factors have single pole forms near the zero recoil. The deviation from the single pole model is taken into account by adding a term proportional to (υ·υ'-1)2. On the other hand, we require the form factors to obey the large recoil symmetry relationships when υ·υ' becomes very large. A self-consistent set of B→K* form factors is found. this set of form factors is checked to be consistent with the experimental data about B→K*ll modes. (authors)