Measurement of the absolute branching fraction of $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$ via ${\bar{K}}^0\to {\pi }^0{\pi }^0$

Abstract

By analyzing 2.93 fb${}^{-1}$ data collected at the center-of-mass energy $\sqrt{s}=3.773$ GeV with the BESIII detector, we measure the absolute branching fraction of the semileptonic decay $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$ to be $\mathcal{B}(D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e)=(8.59\pm 0.14\pm 0.21)\%$ using ${\bar{K}}^0\to K_S^0\to {\pi }^0{\pi }^0$, where the first uncertainty is statistical and the second systematic. Our result is consistent with previous measurements within uncertainties.

8 pages, 4 figures

References in corpus (3)

• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Study of decay dynamics and $CP$ asymmetry in $D^{+}\to K_L^0{e}^{+}{\nu }_e$ decay
• Determination of $f_{+}^K(0)$ and Extraction of $|V_{cs}|$ from Semileptonic $D$ Decays

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