6533b82cfe1ef96bd128fe73
RESEARCH PRODUCT
Double Polarization Observables in η Electroproduction
Harald Merkelsubject
Nuclear physicsPhysicsNuclear and High Energy PhysicsParticle physicsAmplitudeMeson productionPolarization observablesObservableRelative phaseNuclear ExperimentMultipole expansionResonance (particle physics)Interpretation (model theory)description
Abstract A new measurement of beam-recoil double-polarization observables in η electroproduction at the A1 collaboration at MAMI is presented. The energy region of the S 11 ( 1525 ) resonance was covered at a four-momentum transfer of Q 2 = 0.1 GeV 2 / c 2 . It turned out, that the usual interpretation of the reaction mechanism via S 11 and D 13 resonance fails to explain the relative phase between the corresponding multipole amplitudes tested by this experiment, while the new data are still in good agreement with previous measurements.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-08-01 | Nuclear Physics A |