Affiliation: | 1 Department of Physics, University of Toronto, Toronto, Canada MSS 1A7 2 TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., Canada V6T2A3 3 Simon Fraser University, Burnaby, B.C., Canada V5A 1S6 |
Abstract: | The complete set of Wolfenstein parameters, the polarization, the asymmetry of scattering and the unpolarized double-differential cross section are presented for inclusive quasielastic proton scattering from 12C at a central momentum transfer of q = 1.9 fm−1 and incident energies of 290 and 420 MeV. The spin observables D0, Dx, Dy and Dz as well as the longitudinal-to-transverse ratio of spin-flip probabilities are extracted from the data. Across the quasielastic continuum, the experimental data is compared to the variations expected from a single-scattering Fermi-gas approximation using the free NN amplitudes. Medium effects are evident in the pronounced quenching of the polarization parameter relative to the free value. |