Search for the lepton number violating decay $\eta \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+c.c.$ via $J/\psi \to \varphi \eta$

Abstract

Based on a sample of $(10.087\pm 0.044)\times 10^{9}J/\psi$ events collected by the BESIII detector at the BEPCII collider, we perform the first search for the lepton number violating decay $\eta \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+\text{c.c.}$ No signal is found, and an upper limit on the branching fraction of $\eta \to {\pi }^{+}{\pi }^{+}{e}^{-}{e}^{-}+c.c.$ is set to be $4.6\times 10^{-6}$ at the 90\% confidence level.

arXiv comment9 pages, 2 figures

References in corpus (23)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• Future Physics Programme of BESIII
• Study of ${\chi }_{cJ}$ radiative decays into a vector meson
• TopoAna: A generic tool for the event type analysis of inclusive Monte-Carlo samples in high energy physics experiments
• Search for Majorana neutrinos in $B^{-}\to {\pi }^{+}{\mu }^{-}{\mu }^{-}$ decays
• Number of $J/\psi$ events at BESIII
• Bounds on heavy Majorana neutrinos in type-I seesaw and implications for collider searches
• Search for heavy Majorana neutrinos in same-sign dilepton channels in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for heavy Majorana or Dirac neutrinos and right-handed $W$ gauge bosons in final states with two charged leptons and two jets at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for Lepton-Flavor-Violating and Lepton-Number-Violating tau to lhh' Decay Modes
• Inclusive Search for New Physics with Like-Sign Dilepton Events in ppbar Collisions at sqrt{s} = 1.96 TeV
• Search for the lepton number violating decays $B^{+}\to {\pi }^{-}{\mu }^{+}{\mu }^{+}$ and $B^{+}\to K^{-}{\mu }^{+}{\mu }^{+}$
• Searches for lepton number violating $K^{+}$ decays
• Searches for Lepton Number Violation and Resonances in $K^{\pm }\to \pi \mu \mu$ Decays
• Search for lepton number and flavour violation in $K^{+}$ and ${\pi }^0$ decays
• See-saw Mechanisms for Dirac and Majorana Neutrino Masses
• Search for Rare and Forbidden Decays D^+ --> h^pm e^mp e^+
• Search for Rare and Forbidden 3-body Di-muon Decays of the Charmed Mesons D+ and Ds+
• Searches for lepton number violating $K^{+}\to {\pi }^{-}({\pi }^0)e^{+}{e}^{+}$ decays
• Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+
• Searching for ${}^{76}$Ge neutrinoless double beta decay with the CDEX-1B experiment