0000000000368543

AUTHOR

Uwe Schneekloth

showing 2 related works from this author

Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering Determined by the OLYMPUS Experiment

2017

The OLYMPUS collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, $R_{2\gamma}$, a direct measure of the contribution of hard two-photon exchange to the elastic cross section. In the OLYMPUS measurement, 2.01~GeV electron and positron beams were directed through a hydrogen gas target internal to the DORIS storage ring at DESY. A toroidal magnetic spectrometer instrumented with drift chambers and time-of-flight scintillators detected elastically scattered leptons in coincidence with recoiling protons over a scattering angle range of $\approx 20\degree$ to $80\degree$. The relative luminosity between the two beam species was mo…

ratioPhysics::Instrumentation and DetectorsHadronFOS: Physical sciencesSocio-culturaleGeneral Physics and AstronomyElectron01 natural sciencestransfersNuclear physicsEconomica0103 physical sciencesddc:550electromagnetic form factorsNuclear Experiment (nucl-ex)010306 general physicselectromagnetic form factors transfers ratioNuclear ExperimentPhysicsLuminosity (scattering theory)010308 nuclear & particles physicsScatteringGenerator (category theory)Form factor (quantum field theory)BremsstrahlungHigh Energy Physics::ExperimentLeptonPhysical Review Letters
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Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment

2020

Physical review letters 126(16), 162501 (1-6) (2021). doi:10.1103/PhysRevLett.126.162501

ProtonPhysics::Instrumentation and Detectorselectromagnetic [calorimeter]elastic scatteringGeneral Physics and AstronomyElectronmomentum transfer dependence01 natural sciencesEconomicaelectromagnetic form factorsDESY LabNuclear Experiment (nucl-ex)Nuclear ExperimentNuclear ExperimentPhysicsElastic scatteringLuminosity (scattering theory)Form factor (quantum field theory)elastic scattering [cross section]recoil [p]beam [positron]target [hydrogen]electromagnetic [form factor]electron-proton scatteringSocio-culturaleFOS: Physical sciences530electron p: scatteringNuclear physicsCross section (physics)PE2_2PE2_10103 physical sciencesform factor [p]p: recoilddc:530cross section: elastic scattering010306 general physicsPE2_3hydrogen: targetNuclear Physicspositron p: scatteringAmbientalepositron-proton scatteringDESYscattering [electron p]form factor: electromagneticscattering [positron p]positron: beamcalorimeter: electromagneticp: form factorPhysics::Accelerator PhysicsHigh Energy Physics::Experimentspectrometerexperimental resultsLeptonPhysical Review Letters
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