Asymmetry Parameter of the $K_{1} (1270, 1400)$ by Analyzing the $B\to K_{1}ν\barν$ Transition Form Factors within QCD
arXiv:0811.2692 · doi:10.1140/epjc/s10052-009-1001-7
Abstract
Separating the mixture of the $ K_{1}(1270)$ and $K_{1}(1400) $ states, the $B\to K_{1}(1270, 1400)ν\barν$ transition form factors are calculated in the three-point QCD sum rules approach. The longitudinal, transverse and total decay widths as well as the asymmetry parameter, characterizing the polarization of the axial $K_{1}(1270, 1400)$ and the branching ratio for these decays are evaluated.
25 pages, 3 figures, 3 tables