Measurement of the asymmetry parameter A in π-p elastic and charge-exchange scattering at pion energies T/sub π/ = 98, 238, 292, and 310 MeV

The asymmetry parameter A in π-p elastic scattering at incident pion laboratory kinetic energies T/sub π/ of 98, 238, and 292 MeV and in π-p charge-exchange scattering π-p→π0n at T/sub π/ = 238, 292, and 310 MeV have been measured over a wide range of scattering angles (typically from about 600 to 1300 c.m.) with a polarized proton target. The data have been used in an energy-independent phase-shift analysis to improve the precision of the pion-nucleon phase shifts, to set new limits on violation of isospin conservation in the pion-nucleon S wave, and to confirm significant charge dependence in the P/sub 3/2/ wave