Search for the decay Ds+→γe+νe

Citations Over TimeTop 10% of 2019 papers

Abstract

A search for the rare radiative leptonic decay ${D}_{s}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}{e}^{+}{\ensuremath{\nu}}_{e}$ is performed for the first time using electron-positron collision data corresponding to an integrated luminosity of $3.19\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. No evidence for the ${D}_{s}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}{e}^{+}{\ensuremath{\nu}}_{e}$ decay is seen, and an upper limit of $\mathcal{B}({D}_{s}^{+}\ensuremath{\rightarrow}\ensuremath{\gamma}{e}^{+}{\ensuremath{\nu}}_{e})<1.3\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}4}$ is set on the partial branching fraction at a 90% confidence level for radiative photon energies ${E}_{\ensuremath{\gamma}}^{*}>0.01\text{ }\text{ }\mathrm{GeV}$.

Related Papers

• → Measurement of the DAΦNE luminosity with the KLOE detector using large angle Bhabha scattering(2006)43 cited
• → Luminosity measurement with the MD-1 detector at VEPP-4(1988)22 cited
• → A luminosity monitor for the Mark II detector at the SLC(1992)1 cited
• → A Study of Small Angle Radiative Bhabha Scattering and Measurement of the Luminosity at SLD(2004)
• Measurement of Integrated Luminosity at ψ(2S) by Wide-Angle Bhabha Scattering(2000)