\begin{document}$\bar{B}^0\rightarrow [K^-\pi^+]_{S/V}[\pi^+\pi^-]_{V/S} \rightarrow K^-\pi^+\pi^-\pi^+$\end{document} when the \begin{document}$K^-\pi^+$\end{document} and \begin{document}$\pi^-\pi^+$\end{document} pair invariant masses are \begin{document}$0.35<m_{K^-\pi^+}<2.04 \; \mathrm{GeV}$\end{document} and \begin{document}$0<m_{\pi^-\pi^+}<1.06\; \mathrm{GeV}$\end{document}, with the pairs being dominated by the \begin{document}$\bar{K}^*_0(700)^0$\end{document}, \begin{document}$\bar{K}^*(892)^0$\end{document}, \begin{document}$\bar{K}^*(1410)^0$\end{document}, \begin{document}$\bar{K}^*_0(1430)$\end{document} and \begin{document}$\bar{K}^*(1680)^0$\end{document}, and \begin{document}$f_0(500)$\end{document}, \begin{document}$\rho^0(770)$\end{document}, \begin{document}$\omega(782)$\end{document} and \begin{document}$f_0(980)$\end{document} resonances, respectively. When dealing with the dynamical functions of these resonances, \begin{document}$f_0(500)$\end{document}, \begin{document}$\rho^0(770)$\end{document}, \begin{document}$f_0(980)$\end{document} and \begin{document}$\bar{K}^*_0(1430)$\end{document} are modeled with the Bugg model, Gounaris-Sakurai function, Flatté formalism and LASS lineshape, respectively, while the others are described by the relativistic Breit-Wigner function. Adopting the end point divergence parameters \begin{document}$\rho_A\in[0,0.5]$\end{document} and \begin{document}$\phi_A\in[0,2\pi]$\end{document}, our predicted results are \begin{document}$\mathcal{A_{CP}}(\bar{B}^0\rightarrow K^-\pi^+\pi^+\pi^-)\in[-0.365,0.447]$\end{document} and \begin{document}$\mathcal{B}(\bar{B}^0\rightarrow K^-\pi^+\pi^+\pi^-)\in $\end{document}\begin{document}$ [6.11,185.32]\times10^{-8}$\end{document}, based on the hypothetical \begin{document}$q\bar{q}$\end{document} structures for the scalar mesons in the QCD factorization approach. Meanwhile, we calculate the CP violating asymmetries and branching fractions of the two-body decays \begin{document}$\bar{B}^0\rightarrow SV(VS)$\end{document} and all the individual four-body decays \begin{document}$\bar{B}^0\rightarrow SV(VS) \rightarrow K^-\pi^+\pi^-\pi^+$\end{document}, respectively. Our theoretical results for the two-body decays \begin{document}$\bar{B}^0\rightarrow \bar{K}^*(892)^0$\end{document}\begin{document}$f_0(980)$\end{document}, \begin{document}$\bar{B}^0\rightarrow \bar{K}^*_0(1430)^0$\end{document}\begin{document}$\omega(782)$\end{document}, \begin{document}$\bar{B}^0\rightarrow \bar{K}^*(892)^0f_0(980)$\end{document}, \begin{document}$\bar{B}^0\rightarrow $\end{document}\begin{document}$ \bar{K}^*_0(1430)^0\rho$\end{document}, and \begin{document}$\bar{B}^0\rightarrow\bar{K}^*_0(1430)^0\omega$\end{document} are consistent with the available experimental data, with the remaining predictions await testing in future high precision experiments."> Phenomenological studies on <inline-formula><tex-math id="M1">\begin{document}${{\bar{B}^0\rightarrow [K^-\pi^+]_{S/V}[\pi^+\pi^-]_{V/S} \rightarrow K^-\pi^+\pi^+\pi^-}}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2021-0020_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="CPC-2021-0020_M1.png"/></alternatives></inline-formula> decay -
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