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Improved measurement of the absolute branching fraction of \(D^{+}\rightarrow \bar{K}^0 \mu ^{+}\nu _{\mu }\)

By analyzing 2.93 fb\(^{-1}\) of data collected at \(\sqrt{s}=3.773\) GeV with the BESIII detector, we measure the absolute branching fraction \({\mathcal B}(D^{+}\rightarrow \bar{K}^0\mu ^{+}\nu _{\mu })=(8.72 \pm 0.07_\mathrm{stat.} \pm 0.18_\mathrm{sys.})\%\), which is consistent with previous measurements within uncertainties but with significantly improved precision...