Search results for "3.1 GeV-cms"

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Search for the Lepton Flavor Violation Process J/ψ→eμ at BESIII

2013

We search for the lepton-flavor-violating decay of the $J/\psi$ into an electron and a muon using $(225.3\pm2.8)\times 10^{6}$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider. Four candidate events are found in the signal region, consistent with background expectations. An upper limit on the branching fraction of $\mathcal{B}(J/\psi \to e\mu)< 1.5 \times 10^{-7}$ (90% C.L.) is obtained.

J/psi(3100)Nuclear and High Energy PhysicsParticle physicsflavor: violation [lepton]Electron–positron annihilationElectronannihilation [electron positron]High Energy Physics - ExperimentNuclear physicsJ/psi(3100) --> muon electronR-parityddc:530FlavorE ConversionPhysicsMuonBESBranching fractionbackgroundNumberR-ParitySupersymmetryDecayBeijing StorNucleiConstraintsHigh Energy Physics::ExperimentSupersymmetrybranching ratioleptonic decay [J/psi(3100)]TauLimit3.1 GeV-cmsLeptonexperimental results
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