We study the exclusive decays of B→K(*) ℓ+ℓ - by results in perturbative QCD with the heavy quark effective theory and lattice calculations. We obtain the form factors for the B→K(*) transitions in the whole allowed region. Our predictions for the branching ratios of B→K ℓ+ℓ-; B→K(*) e+e-and B→K* μ+μ- are 0.53±0.05-0.07 +0.10, 1.68±0.17-0.09+0.14 and 1.34±0.13-0.06+0.11 × 10-6, where the errors are from the quark mixing elements and hadronic effects, respectively. We also find that our definitions of the T-odd observable and the up-down asymmetry of the K meson in B→K* ℓ+ℓ - → K πℓ+ℓ- can be used to probe new physics.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)