Search results for "Two-photon physics"

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The two-photon physics program at BESIII

2017

Abstract One of the main aspects of the two-photon physics program of the BESIII Collaboration is the determination of electromagnetic transition form factors (TFF). Precision measurements of TFF are needed as input to the calculations of the contribution of hadronic light-by-light scattering to the anomalous magnetic moment of the muon a μ . Data acquired with the BESIII detector allow for the determination of TFF of light pseudoscalar mesons at momentum transfers below 2 GeV2, the region of highest relevance for a μ . The measurements of the TFF of π 0 , η and η ′ mesons, as well as pion pairs, are presented, and the potential for a first double-tagged measurement of the pion transition f…

PhysicsNuclear and High Energy PhysicsParticle physicsMuonMesonAnomalous magnetic dipole moment010308 nuclear & particles physicsNuclear TheoryHadronForm factor (quantum field theory)01 natural sciencesPseudoscalar mesonNuclear physicsPion0103 physical sciencesTwo-photon physicsHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsNuclear and Particle Physics Proceedings

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