Measurements of the Ratios ${\cal B}(D_s^+\to η\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$ and ${\cal B}(D_s^+\to η'\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$

Details Measurements of the Ratios ${\cal B}(D_s^+\to η\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$ and ${\cal B}(D_s^+\to η'\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$ Measurements of the Ratios ${\cal B}(D_s^+\to η\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$ and ${\cal B}(D_s^+\to η'\ell^+ν)/{\cal B}(D_s^+\to φ\ell^+ν)$

1995-08-04

arxiv.org/abs/hep-ex/9508009v1

Phys.Rev.Lett.75:3804-3808,1995

Physics

High Energy Physics

High Energy Physics - Experiment

11 page uuencoded postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevLett.75.3804

Using the CLEO~II detector we measure ${\cal B}(D_s^+\to \eta e^+\nu)/{\cal B}(D_s^+\to \phi e^+\nu) =1.24\pm0.12\pm0.15$, ${\cal B}(D_s^+\to \eta' e^+\nu)/{\cal B}(D_s^+\to \phi e^+\nu) =0.43\pm0.11\pm0.07$ and ${\cal B}(D_s^+\to \eta' e^+\nu)/{\cal B}(D_s^+\to \eta e^+\nu) =0.35\pm0.09\pm0.07$. We find the vector to pseudoscalar ratio, ${\cal B}(D_s^+\to \phi e^+\nu)/{\cal B}(D_s^+\to (\eta+\eta') e^+\nu) =0.60\pm0.06\pm0.06$, which is similar to the ratio found in non strange $D$ decays.

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