| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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B-Meson Wavefunction by a Comparative Analysis of the B→π,K Transition Form Factors |
| ZENG Dai-Min, WU Xing-Gang, FANG Zhen-Yun |
| Department of Physics, Chongqing University, Chongqing 400044 |
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| Cite this article: |
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ZENG Dai-Min, WU Xing-Gang, FANG Zhen-Yun 2009 Chin. Phys. Lett. 26 021401 |
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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.
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| Keywords:
14.40.Aq
12.38.Bx
13.20.He
12.38.Aw
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Received: 10 October 2008
Published: 20 January 2009
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