By measuring the process of electron scattering on protons in which there is a small parity-violating contribution we have determined a new precision limit on the strange vector form factors of the proton
COBISS.SI-ID: 2414180
The results show a nonzero induced polarization above the resonance region. The polarization transfer components vary rapidly with the photon energy and pi0 scattering angle in the CMS. This indicates that hadron helicity conservation does not hold and that the perturbative QCD limit is still not reached in the energy regime of this experiment.
COBISS.SI-ID: 2432100
We report on the first measurement of the bBeam-target double-spin asymmetry on a transversely polarized target in the valence quark region (Bjorken x between 0.16 and 0.35). The results indicate a positive azimuthal asymmetry for pi- and one that is consistent with zero for pi+.
COBISS.SI-ID: 2399588
We have investigated the applicability of LaBr detectors for high-countrate gamma spectroscopy by placing them in a setup with radioactive sources in order to study the dependence of the energy resolution and photo peak efficiency on the count rate.
COBISS.SI-ID: 25897511
The key result of the final analysis is a systematic increase in the results for R, improving the consistency of the polarization transfer data in the high Q2 region. This increase is the result of an improved selection of elastic events which largely removes the systematic effects.
COBISS.SI-ID: 2419812