0000000000472133

AUTHOR

B. Zihlmann

showing 3 related works from this author

Precise measurements of the neutron magnetic form factor

1998

Abstract The neutron magnetic form factor Gmn has been determined via a measurement of the ratio of cross sections D(e,e′n) and D(e,e′p). The absolute detection efficiency of the neutron detector was measured with high accuracy using tagged neutrons produced from H(n,p)n elastic scattering by means of a high intensity neutron beam. This approach minimizes the model dependence and improves upon the weakest points of previous experiments. Data in the range q2=0.2–0.8 (GeV/c)2 with uncertainties of

Elastic scatteringPhysicsNuclear physicsNuclear and High Energy PhysicsRange (particle radiation)Astrophysics::High Energy Astrophysical PhenomenaMagnetic form factorNeutron detectionNeutronAtomic physicsNeutron radiationNuclear ExperimentIntensity (heat transfer)Physics Letters B
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Nuclear-mass dependence of azimuthal beam-helicity and beam-charge asymmetries in deeply virtual Compton scattering

2009

The nuclear-mass dependence of azimuthal cross section asymmetries with respect to charge and longitudinal polarization of the lepton beam is studiedfor hard exclusive electroproduction of real photons. The observed beam-charge and beam-helicity asymmetries are attributed to the interference between the Bethe-Heitler and deeply virtual Compton scattering processes. For various nuclei, the asymmetries are extracted for both coherent and incoherent-enriched regions, which involve different (combinations of) generalized parton distributions. For both regions, the asymmetries are compared to those for a free proton, and no nuclear-mass dependence is found.

Nuclear and High Energy PhysicsParticle physicsPhotonNuclear TheoryHERAFOS: Physical sciencesIMPACT PARAMETER SPACEPartonGENERALIZED PARTON DISTRIBUTIONS; IMPACT PARAMETER SPACE; SPIN; HERA01 natural sciences7. Clean energyHigh Energy Physics - ExperimentNuclear physicsHigh Energy Physics - Experiment (hep-ex)GENERALIZED PARTON DISTRIBUTIONS0103 physical sciencesddc:530Nuclear Experiment010306 general physicsPhysicsElastic scattering010308 nuclear & particles physicsScatteringCompton scatteringHERASPINPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNucleonBeam (structure)
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Measurement of azimuthal asymmetries associated with deeply virtual Compton scattering on a longitudinally polarized deuterium target

2010

Azimuthal asymmetries in exclusive electroproduction of a real photon from a longitudinally polarized deuterium target are measured with respect to target polarization alone and with respect to target polarization combined with beam helicity and/or beam charge. The asymmetries appear in the distribution of the real photons in the azimuthal angle $\phi$ around the virtual photon direction, relative to the lepton scattering plane. The asymmetries arise from the deeply virtual Compton scattering process and its interference with the Bethe-Heitler process. The results for the beam-charge and beam-helicity asymmetries from a tensor polarized deuterium target with vanishing vector polarization ar…

Nuclear and High Energy Physics/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energyEVOLUTION KERNELS010308 nuclear & particles physicsGENERALIZED PARTON DISTRIBUTIONS; IMPACT PARAMETER SPACE; ELECTRON STORAGE-RING; EVOLUTION KERNELS; HERA; SPIN; NUCLEON; QCDHERAIMPACT PARAMETER SPACEFOS: Physical sciencesQCD01 natural sciencesHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)ELECTRON STORAGE-RINGSPINGENERALIZED PARTON DISTRIBUTIONS0103 physical sciencesddc:530High Energy Physics::ExperimentSDG 7 - Affordable and Clean EnergyNUCLEON010306 general physics
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