A solid, polarized HD target has been developed for the measurement of double-polarization observables in the Δ resonance region. We report here the inaugural data obtained with this target. This new polarized target technology, combined with the high quality LEGS photon beam and the large acceptance spectrometer, SASY, provides a unique facility for studying the spin structure of the nucleon below 500 MeV. Pion production data collected on a longitudinally polarized target with six γ-ray polarization states provides the first simultaneous measurement of as well as the Σ, G and E asymmetries. With the future addition of magnetic analysis to SASY, a complete set of pion production observables on the proton and the deuteron (neutron) will be obtained.
THE FIRST PION PHOTOPRODUCTION RESULTS FROM POLARIZED HD AT LEGS
BELLINI, Vincenzo;
2002-01-01
Abstract
A solid, polarized HD target has been developed for the measurement of double-polarization observables in the Δ resonance region. We report here the inaugural data obtained with this target. This new polarized target technology, combined with the high quality LEGS photon beam and the large acceptance spectrometer, SASY, provides a unique facility for studying the spin structure of the nucleon below 500 MeV. Pion production data collected on a longitudinally polarized target with six γ-ray polarization states provides the first simultaneous measurement of as well as the Σ, G and E asymmetries. With the future addition of magnetic analysis to SASY, a complete set of pion production observables on the proton and the deuteron (neutron) will be obtained.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
