Probing eμ flavor-violating ALP at Belle II
Motoi Endo, Syuhei Iguro, Teppei Kitahara
Abstract
A bstract Recently, it was pointed out that the electron and muon g − 2 discrepancies can be explained simultaneously by a single flavor-violating axion-like particle (ALP). We show that the parameter regions favored by the muon g − 2 are already excluded by the muonium-antimuonium oscillation bound. In contrast, those for the electron g − 2 can be consistent with this bound when the ALP is heavier than 1 . 5 GeV. We propose to search for a signature of the same-sign and same-flavor lepton pairs and the forward-backward muon asymmetry to test the model at the Belle II experiment.
Topics & Concepts
PhysicsMuonParticle physicsLeptonAsymmetryNuclear physicsElectronOscillation (cell signaling)Particle decayElectron–positron annihilationStandard Model (mathematical formulation)Signature (topology)Physics beyond the Standard ModelElementary particleProtonSupersymmetryCP violationParticle physics theoretical and experimental studiesComputational Physics and Python ApplicationsParticle Detector Development and Performance