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Search for the semileptonic decay <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mn>0</mml:mn><mml:mo stretchy="false">(</mml:mo><mml:mo>+</mml:mo><mml:mo stretchy="false">)</mml:mo></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msub><mml:mi>b</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>1235</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mrow><mml:mo>−</mml:mo><mml…
Using $2.93\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data collected at a center-of-mass energy $\sqrt{s}=3.773\text{ }\text{ }\mathrm{GeV}$ with the BESIII detector operating at the BEPCII collider, we search for the semileptonic ${D}^{0(+)}$ decays into a ${b}_{1}(1235{)}^{\ensuremath{-}(0)}$ axial-vector meson for the first time. No significant signal is observed for either charge combination. …