6533b86efe1ef96bd12cc82b
RESEARCH PRODUCT
New Measurements of the Beam Normal Spin Asymmetries at Large Backward Angles with Hydrogen and Deuterium Targets
E. SchillingR. KunneC. WeinrichJ. DiefenbachR. FrascariaF. E. MaasD. Von HarrachU. MüllerHarald MerkelS. KowalskiS. BaunackM. C. Mora EspíR. KotheJongmin LeeS. OngJ. ArvieuxD. Balaguer RíosE. M. KabußY. ImaiB. GläserJ. Van De WieleM. MorletKurt AulenbacherM. A. El-yakoubiL. CapozzaY. Proksubject
Born approximationelectronProtonGeneral Physics and AstronomyElectronelectron nucleonInelastic scattering[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesResonance (particle physics)Nuclear physicsstatistical analysis0103 physical sciencesexcited stateBorn approximation010306 general physicsNuclear ExperimentSpin-½hydrogen: targetPhysicsQuasielastic scatteringexchange: two-photon010308 nuclear & particles physicsnucleoninelastic scatteringangular dependenceresonanceHigh Energy Physics::Experimentdeuteron: targetAtomic physicsNucleonspin: asymmetryexperimental resultsphoton: virtualdescription
International audience; New measurements of the beam normal single spin asymmetry in the electron elastic and quasielastic scattering on the proton and deuteron, respectively, at large backward angles and at ⟨Q2⟩=0.22 (GeV/c)2 and ⟨Q2⟩=0.35 ( GeV/c)2 are reported. The experimentally observed asymmetries are compared with the theoretical calculation of Pasquini and Vanderhaeghen [Phys. Rev. C 70, 045206 (2004).PRVCAN0556-281310.1103/PhysRevC.70.045206]. The agreement of the measurements with the theoretical calculations shows a dominance of the inelastic intermediate excited states of the nucleon, πN and the Δ resonance. The measurements explore a new, important parameter region of the exchanged virtual photon virtualities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-01 |