K0∗(1430) twist-2 distribution amplitude and Bs,Ds→K0∗(1430) transition form factors.

Based on the scenario that the K 0 ∗ (1430) is viewed as the ground state of s q ¯ or q s ¯ , we study the K 0 ∗ (1430) leading-twist distribution amplitude (DA) ϕ 2 ; K 0 ∗ (x , μ) with the QCD sum rules in the framework of background field theory. A more reasonable sum rule formula for ξ -moments ⟨ ξ n ⟩ 2 ; K 0 ∗ is suggested, which eliminates the influence brought by the fact that the sum rule of ⟨ ξ p 0 ⟩ 3 ; K 0 ∗ cannot be normalized in whole Borel region. More accurate values of the first ten ξ -moments, ⟨ ξ n ⟩ 2 ; K 0 ∗ (n = 1 , 2 , ... , 10) , are evaluated. A new light-cone harmonic oscillator (LCHO) model for K 0 ∗ (1430) leading-twist DA is established for the first times. By fitting the resulted values of ⟨ ξ n ⟩ 2 ; K 0 ∗ (n = 1 , 2 , ... , 10) via the least squares method, the behavior of K 0 ∗ (1430) leading-twist DA described with LCHO model is determined. Further, by adopting the light-cone QCD sum rules, we calculate the B s , D s → K 0 ∗ (1430) transition form factors and branching fractions of the semileptonic decays B s , D s → K 0 ∗ (1430) ℓ ν ℓ . The corresponding numerical results can be used to extract the Cabibbo-Kobayashi-Maskawa matrix elements by combining the relative experimental data in the future. [ABSTRACT FROM AUTHOR]