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Observation of the Dalitz Decay $D_{s}^{*+} \to D_{s}^{+} e^{+} e^{-}$

Abstract:
Using 586 $\textrm{pb}^{-1}$ of $e^{+}e^{-}$ collision data acquired at $\sqrt{s}=4.170$ GeV with the CLEO-c detector at the Cornell Electron Storage Ring, we report the first observation of $D_{s}^{*+} \to D_{s}^{+} e^{+} e^{-}$ with a significance of $5.3 \sigma$. The ratio of branching fractions $\calB(D_{s}^{*+} \to D_{s}^{+} e^{+} e^{-}) / \calB(D_{s}^{*+} \to D_{s}^{+} \gamma)$ is measured to be $[ 0.72^{+0.15}_{-0.13} (\textrm{stat}) \pm 0.10 (\textrm{syst})]%$, which is consistent with theoretical expectations.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevD.86.072005

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Journal:
Physical Review D
Volume:
86
Issue:
7
Publication date:
2011-04-16
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
Source identifiers:
356615
Language:
English
Keywords:
Pubs id:
pubs:356615
UUID:
uuid:b68ea40e-9a76-486c-84b0-b2de65626ec6
Local pid:
pubs:356615
Deposit date:
2013-11-16

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