Search for the ${\eta }^{\prime }\to e^{+}{e}^{-}$ decay with the SND detector

Abstract

A search for the process $e^{+}{e}^{-}\to {\eta }^{\prime }$ has been performed with the SND detector at the VEPP-2000 $e^{+}{e}^{-}$ collider. The data were accumulated at the center-of-mass energy of $957.78\pm 0.06$ MeV with an integrated luminosity of about 2.9 pb${}^{-1}$. For reconstruction of the ${\eta }^{\prime }$ meson five decay chains have been used: ${\eta }^{\prime }\to \eta {\pi }^{+}{\pi }^{-}$ followed by the $\eta$ decays to $\gamma \gamma$ and $3{\pi }^0$, and ${\eta }^{\prime }\to \eta {\pi }^0{\pi }^0$ followed by the $\eta$ decays to ${\pi }^{+}{\pi }^{-}{\pi }^0$, $\gamma \gamma$, and $3{\pi }^0$. As a result, the upper limit has been set on the ${\eta }^{\prime }$ electronic width: ${\Gamma }_{{\eta }^{\prime }\to e^{+}{e}^{-}}<0.0020$ eV at the 90\% confidence level.

arXiv comment12 pages, 6 figures

References in corpus (14)

• Big-Bang Nucleosynthesis
• Study of the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^0$ in the energy region $\sqrt[]{s}$ below 0.98 GeV
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• Rare decay π^0 \to e^+e^- as a Test of Standard Model
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• Reanalysis of the $e^{+}{e}^{-}\to \eta \gamma$ reaction cross section
• Search for the process $e^{+}{e}^{-}\to {\eta }^{\prime }(958)$ with the CMD-3 detector
• Study of the Process e+ e- --> pi0 pi0 gamma in c.m. Energy Range 600--970 MeV at CMD-2
• Rare decay ${\pi }^0\to e^{+}{e}^{-}$ constraints on the light CP-odd Higgs in NMSSM

Cited by in corpus (12)

• The anomalous magnetic moment of the muon in the Standard Model
• Pseudoscalar-pole contribution to the $(g_{\mu }-2)$: a rational approach
• Precision tests of fundamental physics with $\eta$ and ${\eta }^{\prime }$ mesons
• Study of the process $e^{+}{e}^{-}\to K_S^0{K}_L^0$ in the center-of-mass energy range 1004--1060 MeV with the CMD-3 detector at the VEPP-2000 $e^{+}{e}^{-}$ collider
• What can we learn about light-meson interactions at electron-positron colliders?
• Study of the process $e^{+}{e}^{-}\to \omega \eta {\pi }^0$ in the energy range $\sqrt{s}<2$ GeV with the SND detector
• Search for direct production of the $f_1(1285)$ resonance in $e^{+}{e}^{-}$ collisions
• $f_1(1285)\to e^{+}{e}^{-}$ decay and direct $f_1$ production in $e^{+}{e}^{-}$ collisions
• First Observation of the Direct Production of the ${\chi }_{c1}$ in $e^{+}{e}^{-}$ Annihilation
• On a search for the $\eta \to e^{+}{e}^{-}$ decay at the VEPP-2000 $e^{+}{e}^{-}$ collider
• Geometric calibration of the SND detector electromagnetic calorimeter
• Pseudoscalar decays into lepton pairs from rational approximants