Roland Meier

Polarization transfer observables in πd elastic scattering

Polarization transfer measurements in π+ elastic scattering have been performed at two incident pion energies, one below and one at the Δ(3, 3)-resonance. Using a vector polarized deuteron target four polarization transfer observables are determined. The results are compared to predictions from Faddeev calculations.

Measurement of the vector analyzing power iT 11 in π + − 6 Li→ scattering

The vector analyzing power {ital iT}{sub 11} was measured for {pi}{sup +}-{sup 6}{rvec L}i elastic and inelastic scattering (3{sup +}, 2.19 MeV) at 100, 134, 164, and 219 MeV, in an angular range between 40{degree} and 125{degree} using a vector polarized {sup 6}LiD target. Sizable spin effects were observed over most of the angular range. The data were compared with a number of theoretical predictions based on different scattering models and nuclear structure input. None of the calculations is able to reproduce the data set; however, it appears that the vector analyzing power {ital iT}{sub 11} is mostly sensitive to the nuclear wave function chosen. The angular distribution of {ital iT}{sub 11} in {pi}{sup +}-{sup 6}Li elastic and inelastic scattering is discussed in terms of nuclear form factors and elementary {pi}{ital N} amplitudes.