Spin Correlation Coefficients in pp-->pnpi+ from 325 to 400 MeV
Swapan K. Saha, W.W. Daehnick, R.W. Flammang, J.T. Balewski, H.O. Meyer, R.E. Pollock, B.v. Przewoski, T. Rinckel, P. Thorngren-Engblom, B. Lorentz, F. Rathmann, B. Schwartz, T. Wise, P.V. Pancella
Abstract
The spin correlation coefficient combinations Axx + Ayy, Axx - Ayy and the analyzing powers Ay(theta) were measured for pp-->pnpi+ at beam energies of 325, 350, 375 and 400 MeV. A polarized internal atomic hydrogen target and a stored, polarized proton beam were used. These polarization observables are sensitive to contributions of higher partial waves. A comparison with recent theoretical calculations is provided.