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In the two-quark model supposition for $K_0^{*}(1430)$, the branching ratiosand the direct CP-violating asymmetries for decays $\bar B_s^0\toK^{*0}_0(1430)\pi^0, K^{*+}_0(1430)\pi^-$ are studied by employing theperturbative QCD factorization approach. We find that although these two decaysare both tree-dominated, the ratio of their penguin to tree contributions arevery different: there is only a few percent for the decay $\bar B_s^0\toK^{*+}_0(1430)\pi^-$, while about 37% in scenario I, even 51% in scenario IIfor the decay $\bar B_s^0\to K^{*0}_0(1430)\pi^0$. It results that these twodecays have very different values in the branching ratios and the direct CPasymmetries. The branching ratio of the decay $\bar B_s^0\toK^{*+}_0(1430)\pi^-$ is at the order of $10^{-5}$, and its direct CP asymmetryis about (20-30)%. While for the decay $\bar B_s^0\to K^{*0}_0(1430)\pi^0$, itsdirect CP-violating asymmetry is very large and about 90%, but it is difficultto measure it, because the branching ratio for this channel is small and only$10^{-7}$ order.

Branching Ratio and CP Asymmetry of B_s \to K^*_0(1430)\pi Decays in the PQCD Approach