Abstract
Properties of the B-meson light-cone wavefunction up to next-to-leading order Fock state expansion are studied by a comparative study of the B → π, K form factors within the kT factorization approach and the light-cone sum rule analysis. The form factors F+, 0,TB → π and F+,0,TB → K are carefully re-calculated up to O(1/mb2) within the kT factorization approach in the large recoil region. The QCD light-cone sum rule is applicable in the large and intermediate energy regions, and the QCD light-cone sum rule results of Ball and Zwicky [Phys. Rev. D 71 (2005) 014015] are adopted for such a comparative study. It is found that when the two phenomenological parameters λ̄ [0.50, 0.55] and δ ∊ [0.25, 0.30], the results of F+,0,TB → π(Q2) and F+,0,TB → K(Q2) from these two approaches are consistent with each other in the large recoil energy region.
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