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Search for the decay D^+_(s)toω e^+ν

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arxiv 1105.2720 v1 pith:HSTSQQAB submitted 2011-05-13 hep-ex

Search for the decay $D^+_{s}\to\omega e^+\nu$

classification hep-ex
keywords omegadecaysearchbranchingcenter-of-masscollectedcollisionconfidence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 $\omega$-$\phi$ 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.

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