Study of $D_{s}^{+}$ →φ $e^{+}$ $ν_{e}$ and the absolute $D_{s}^{+}$ →φ $π^{+}$ branching fraction

Publisher Website

11 June 1990

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 64 (24) , 2885-2888
https://doi.org/10.1103/physrevlett.64.2885

Abstract

We have searched for the decay

D_{s}^{+}

→φ

e^{+}

ν_{e}

in data from the Fermilab charm photoproduction experiment E691. The resulting upper limit is B(

D_{s}^{+}

→φ

e^{+}

ν_{e}

)<0.45B(

D_{s}^{+}

→φ

π^{+}

). Since the branching fraction for

D_{s}^{+}

→φ

e^{+}

ν_{e}

can be calculated from the measured branching fraction B(

D^{+}

→K¯

{}^{* 0}

e^{+}

ν_{e}

) to be (1.7±0.3)%, this implies a 90%-confidence-level lower limit on B(

D_{s}^{+}

→φ

π^{+}

) of 3.4%.

Keywords

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