6533b835fe1ef96bd129ebaa
RESEARCH PRODUCT
Transverse Beam Spin Asymmetries at Backward Angles in Elastic Electron-Proton and Quasielastic Electron-Deuteron Scattering
Marc VanderhaeghenJ. RocheM. K. JonesJay BeneschJ. HansknechtA. LungJ. W. MartinH. BreuerW. F. VulcanChristophe FurgetS. F. PateH. MkrtchyanG. FloresMichael GerickeR. SuleimanR. SuleimanDarko AndroićS. KoxG. GuillardT. SevaM. StutzmanS. A. PageJ. SchaubL. LeeDouglas H BeckFatiha BenmokhtarFatiha BenmokhtarM. MuetherV. PapavassiliouS. WellsC. L. CapuanoT. HornR. D. MckeownW. D. RamsayW. T. H. Van OersP. BostedS. A. WoodE. VoutierD. T. SpaydeJ. S. RealM. PoelkerG. B. FranklinC. A. DavisD. GaskellB. PasquiniP. M. KingB. P. QuinnL. BimbotS. E. WilliamsonNeven SimicevicY. C. ChaoWolfgang KorschJ. BirchallJuliette MammeiP. G. RoosJ. GramesC. EllisM. VersteegenS. K. PhillipsJ. ArvieuxA. MicherdzinskaD. S. ArmstrongG. R. SmithM. MihovilovičE. J. BeiseV. TadevosyanA. CoppensMichael PittS. L. BaileyJunyu LiuP. Pillotsubject
Nuclear TheoryNuclear TheoryGeneral Physics and Astronomyaxial-vector currentFOS: Physical sciencesInelastic scatteringMott scattering[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]strange quark01 natural sciencesNuclear physicsNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)parity-violating asymmetries; axial-vector current; strange quark; charge and magnetic nucleon form factors0103 physical sciencesNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear ExperimentElastic scatteringPhysicsQuasielastic scattering010308 nuclear & particles physicsScatteringcharge and magnetic nucleon form factorsparity-violating asymmetriesSmall-angle neutron scatteringNATURAL SCIENCES. Physics.PRIRODNE ZNANOSTI. Fizika.High Energy Physics - PhenomenologyQuasielastic neutron scatteringPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentScattering theoryAtomic physicsdescription
We have measured the beam-normal single-spin asymmetries in elastic scattering of transversely polarized electrons from the proton, and performed the first measurement in quasi-elastic scattering on the deuteron, at backward angles (lab scattering angle of 108 degrees) for Q2 = 0.22 GeV^2/c^2 and 0.63 GeV^2/c^2 at beam energies of 362 MeV and 687 MeV, respectively. The asymmetry arises due to the imaginary part of the interference of the two-photon exchange amplitude with that of single photon exchange. Results for the proton are consistent with a model calculation which includes inelastic intermediate hadronic (piN) states. An estimate of the beam-normal single-spin asymmetry for the scattering from the neutron is made using a quasi-static deuterium approximation, and is also in agreement with theory.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-03-18 |