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Search for the decay D_s^+rightarrow γ e^+ν_e
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arxiv 1902.03351 v2 pith:KZ6WGPDV submitted 2019-02-09 hep-ex
Search for the decay D_s^+rightarrow γ e^+ν_e
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A search for the rare radiative leptonic decay $D_s^+\to\gamma e^+\nu_e$ is performed for the first time using electron-positron collision data corresponding to an integrated luminosity of 3.19 fb$^{-1}$, collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. No evidence for the $D_s^+\to\gamma e^+\nu_e$ decay is seen and an upper limit of $\mathcal B(D_s^+\to\gamma e^+\nu_e)<1.3\times 10^{-4}$ is set on the partial branching fraction at a 90\% confidence level for radiative photon energies $E_{\gamma}^*>0.01$~GeV.
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Review of experimental studies of charmed meson decays at BESIII
hep-ex 2026-04 unverdicted novelty 3.0
A review of BESIII charmed meson decay studies presents the most precise averages for |V_cs|, |V_cd|, D and D_s decay constants, and several hadronic form factors from combined experimental results.
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