Search for the decay $D_s^{+}\to \omega e^{+}\nu$

Abstract

We present the first search for the decay $D_s^{+}\to \omega e^{+}\nu$ to test the four-quark content of the $D_s^{+}$ and the $\omega$-$\varphi$ mixing model for this decay. We use 586 ${\mathrm{pb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of 4170 MeV. We find no evidence of a signal, and set an upper limit on the branching fraction of $\mathcal{B}(D_s^{+}\to \omega e^{+}\nu )<$0.20% at the 90% confidence level.

18 pages, 9 figures

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• Branching fractions and polarizations of $D\to V(\omega ,\rho ,K^{\ast })\ell {\nu }_{\ell }$ within QCD LCSR