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Test of lepton universality and measurement of the form factors of \(D^0\to K^{*}(892)^-μ^+ν_μ\)

By Besiii Collaboration and others
We report a first study of the semileptonic decay \(D^0\rightarrow K^-\pi^0\mu^{+}\nu_{\mu}\) by analyzing an \(e^+e^-\) annihilation data sample of \(7.9~\mathrm{fb}^{-1}\) collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The absolute branching fraction of \(D^0\to K^-\pi^0\mu^{+}\nu_{\mu}\) is measured for the first time to be $(0.729 \pm 0.014_{\rm... Show more
March 16, 2024
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