In the paper, we apply the kT factorization approach to deal with the B→K transition form factor with tensor current in the large recoil regions. Main uncertainties for the estimation are discussed and we obtain FTB→K(0)=0.25±0.01±0.02, where the first error is caused by the uncertainties from the pionic wave functions and the second is from that of the B-meson wave functions. This result is consistent with the light-cone sum rule results obtained in the literature.
@article{arxiv.0801.0626,
title = {$B\to K$ Transition Form Factor with Tensor Current within the $k_T$ Factorization Approach},
author = {Dai-Min Zeng and Xing-Gang Wu and Zhen-Yun Fang},
journal= {arXiv preprint arXiv:0801.0626},
year = {2008}
}