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Measurement of the ratio<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="script">B</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:msup><mml:mi>B</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo>*</mml:mo><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>/</mml:mo><mml:mi mathvariant="script">B</mml:mi><mml:mo…
We study the decays ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{*0}{\ensuremath{\pi}}^{\ensuremath{-}}$ and ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{*0}{K}^{\ensuremath{-}}$, where the ${D}^{*0}$ decays into ${D}^{0}{\ensuremath{\pi}}^{0}$, with the ${D}^{0}$ reconstructed in the $CP$-even ($CP+$) eigenstates ${K}^{\ensuremath{-}}{K}^{+}$ and ${\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ and in the (non-$CP$) channels ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, and ${K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$. Using a sample of about $123\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs, we measure the ratios of decay rates ${R}_{\mathrm{n}\mathrm{o}\mathrm{n}\ensuremath{-}CP}^{*}\ensuremath{\equiv}\frac{\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{\mathrm{n}\mathrm{o}\mathrm{n}\ensuremath{-}CP}^{*0}{K}^{\ensuremath{-}})}{\mathcal{B}({B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}_{\mathrm{n}\mathrm{o}\mathrm{n}\ensuremath{-}CP}^{*0}{\ensuremath{\pi}}^{\ensuremath{-}})}=0.0813\ifmmode\pm\else\textpm\fi{}0.0040{(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t})}_{\ensuremath{-}0.0031}^{+0.0042}(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t}),$ …