Measurement of mass and width of the excited charmed meson states<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>D</mml:mi><mml:mn>1</mml:mn><mml:mn>0</mml:mn></mml:msubsup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>D</mml:mi><mml:mn>2</mml:mn><mml:mrow><mml:mo>*</mml:mo><mml:mn>0</mml:mn></mml:mrow></mml:msubsup></mml:math>at CDF

We report on precision measurements of the masses and widths of the narrow, orbitally excited states ${D}_{1}^{0}$ and ${D}_{2}^{*0}$ using the CDF II detector at the Fermilab Tevatron. Both states (collectively called ${D}^{**}$) are reconstructed in the decay channel ${D}^{**}\ensuremath{\rightarrow}{D}^{*+}{\ensuremath{\pi}}^{\ensuremath{-}}$. The ${D}_{2}^{*0}$ is also reconstructed in the ${D}^{**}\ensuremath{\rightarrow}{D}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ channel. Using a data set with an integrated luminosity of $210\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$, the measured masses and widths for the ${D}_{1}^{0}$ are $2421.7\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}0.6\text{ }\mathrm{MeV}/{c}^{2}$ and $20.0\ifmmode\pm\else\textpm\fi{}1.7\ifmmode\pm\else\textpm\fi{}1.3\text{ }\mathrm{MeV}/{c}^{2}$ respectively, while for the ${D}_{2}^{*0}$ they are $2463.3\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.8\text{ }\mathrm{MeV}/{c}^{2}$ and $49.2\ifmmode\pm\else\textpm\fi{}2.3\ifmmode\pm\else\textpm\fi{}1.2\text{ }\mathrm{MeV}/{c}^{2}$. These values are currently the single best measurements available.

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