$B\to K$ Transition Form Factor with Tensor Current within the $k_T$ Factorization Approach

Zeng, Dai-Min; Wu, Xing-Gang; Fang, Zhen-Yun

$B\to K$ Transition Form Factor with Tensor Current within the $k_T$ Factorization Approach

Authors

Zeng, Dai-Min

Wu, Xing-Gang

Fang, Zhen-Yun

Description

In the paper, we apply the $k_T$ factorization approach to deal with the $B\to K$ transition form factor with tensor current in the large recoil regions. Main uncertainties for the estimation are discussed and we obtain $F_T^{B\to K}(0)=0.25\pm0.01\pm0.02$, 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.
8 pages, 4 figures, references added