Remarks on the recently observed B decays into $f_X(1300)K$ and $J\mathrm{/}\psi K_X^{\ast }(1430)$

In light of the recent experimental results on decays $B^{+}\to f_X(1300)K^{+}$ and $B^{\pm (0)}\to J\mathrm{/}\psi K_X^{\ast \pm (0)}(1430)$ from Belle, we study the $B \to P(V) S$typedecays,$B^{\pm(0)} \to f_0(1370) K^{\pm(0)}$and$B^{\pm(0)} \to J/\psi K_0^{\pm(0)}(1430)$,incomparisonwiththe$B \to P(V) T$typedecays,$B^{\pm(0)} \to f_2(1270) K^{\pm(0)}$and$B^{\pm(0)} \to J/\psi K_2^{\pm(0)}(1430)$. We calculate the BRs for these decays by using the form factors obtained in the ISGW2 model [the improved version of the original Isgur-Scora-Grinstein-Wise (ISGW) model], as well as the ISGW model for comparison. The ratios of $\mathcal{B}(B\to P(V)S)\mathrm{/}\mathcal{B}(B\to P(V)T)$ are also presented.