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Recently, the standard model predictions for the $B$-meson hadronic decays,$\bar{B}^0 \to D^{(\ast)+}K^-$ and $\bar{B}^0_s \to D^{(\ast)+}_s \pi^-$, havebeen updated based on the QCD factorization approach. This improvement shedslight on a novel puzzle in the $B$-meson hadronic decays: there are mild butuniversal tensions between data and the predicted branching ratios. Assumingthe higher-order QCD corrections are not huge enough to solve the tension, weexamine several new physics interpretations of this puzzle. We find that thetension can be partially explained by a left-handed $W^\prime$ model, which canbe compatible with other flavor observables and collider bounds.

Implications for new physics from a novel puzzle in $\bar{B}_{(s)}^0 \to D^{(\ast)+}_{(s)} \lbrace \pi^-, K^- \rbrace$ decays