Search results for "e-e Experiments"

showing 3 items of 3 documents

Search for the rare semi-leptonic decay J/ψ → D−e+ ν e + c.c.

2021

Abstract Using 10.1 × 109J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy $$ \sqrt{s} $$ s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction ℬ(J/ψ → D−e+νe + c. c.) < 7.1 × 10−8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.

Nuclear and High Energy PhysicsParticle physicse+-e− ExperimentsQC770-798Electron+01 natural scienceslaw.inventionNOPositronlawNuclear and particle physics. Atomic energy. Radioactivity0103 physical sciences010306 general physicsColliderPhysics-e010308 nuclear & particles physicsBranching fractionHeavy Quarkonium−e +-e − Experimentse; +; -e; −; Experimentsee-e ExperimentsHigh Energy Physics::ExperimentWeak DecaysExperimentsOrder of magnitudeJournal of High Energy Physics
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Observation of e + e − → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

2021

Journal of high energy physics 2021(10), 177 (2021). doi:10.1007/JHEP10(2021)177

ExoticsNuclear and High Energy Physicsmeasured [channel cross section]e+-e− ExperimentsQuarkoniumannihilation [electron positron]QC770-798electron positron: annihilationetaParticle and resonance productionMeasure (mathematics)530Standard deviationNONuclear physicsSubatomär fysikCross section (physics)e+-e��� Experimentsenergy dependence: measured [cross section]Astronomi astrofysik och kosmologiNuclear and particle physics. Atomic energy. RadioactivitySubatomic PhysicsAstronomy Astrophysics and Cosmologyddc:530e+-e− Experiments Exotics Particle and resonance production Quarkoniumpsi(3685)PhysicsBESe(+)-e(-) ExperimentsDetectorstatistical [error]electron positron --> eta psi(3685)e +-e − Experimentselectron positron: colliding beamsBeijing Stor4.236-4.600 GeV-cmsCollisionerror: statisticalYield (chemistry)e-e Experimentselectron positron --> eta psi(3685)colliding beams [electron positron]High Energy Physics::ExperimentCenter of masscross section: energy dependence: measuredchannel cross section: measuredStorage ringexperimental results
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Amplitude analysis and branching-fraction measurement of D-s(+) -> K-S(0)pi(+)pi(0)

2022

Journal of high energy physics 2021(6), 181 (2021). doi:10.1007/JHEP06(2021)181

Nuclear and High Energy PhysicsAnalytical chemistrye+-e− Experiments+53001 natural sciencesBranching fraction; Charm physics; e; +; -e; −; ExperimentsNOSubatomär fysikSubatomic Physics0103 physical sciencesPiddc:530010306 general physicsCharm physicsPhysics-e010308 nuclear & particles physicsBranching fractione(+)-e(-) Experiments−Branching fraction Charm physics e+-e− ExperimentseAmplitudee-e ExperimentsBranching fractionExperiments
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