摘要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 FB→π+,0,T and FB→K+,0,T 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 in Ref.[12] are adopted for such a comparative study. It is found that when the two phenomenological parameters Λ∈ [0.50,0.55]$ and δ∈[0.25,0.30]$, the results of FB→π+,0,T(Q2) and FB→K+,0,T(Q2) from these two approaches are consistent with each other in the large recoil energy region.
Abstract：Properties of the B-meson light-cone wavefunction up to next-to-leading order Fock state expansion are studied by a comparative study of the B→π,K form factors within the kT factorization approach and the light-cone sum rule analysis. The form factors FB→π+,0,T and FB→K+,0,T are carefully re-calculated up to O(1/mb2) within the kT factorization approach in the large recoil region. The QCD light-cone sum rule is applicable in the large and intermediate energy regions, and the QCD light-cone sum rule results in Ref.[12] are adopted for such a comparative study. It is found that when the two phenomenological parameters Λ∈ [0.50,0.55]$ and δ∈[0.25,0.30]$, the results of FB→π+,0,T(Q2) and FB→K+,0,T(Q2) from these two approaches are consistent with each other in the large recoil energy region.
(General properties of QCD (dynamics, confinement, etc.))
引用本文:
ZENG Dai-Min;WU Xing-Gang;FANG Zhen-Yun. B-Meson Wavefunction by a Comparative Analysis of the B→π,K Transition Form Factors[J]. 中国物理快报, 2009, 26(2): 21401-021401.
ZENG Dai-Min, WU Xing-Gang, FANG Zhen-Yun. B-Meson Wavefunction by a Comparative Analysis of the B→π,K Transition Form Factors. Chin. Phys. Lett., 2009, 26(2): 21401-021401.
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2009, Vol. 26 
