Measurement of the H3(π+,3He)π0 differential cross section at Tπ=142 MeV

Measurements of the differential cross section for the pion-induced isobaric analog transition in the [ital A]=3 system are presented. This measurement, in which low energy recoiling nuclei were detected, is the first at forward pion angles and incident energies where the spin flip ([Delta][ital S]=1) contribution to the differential cross section is predicted to have its strongest influence. Although the data are not sufficiently accurate to support a definitive conclusion, they agree best with a calculation that includes this contribution.