Vector analyzing power [ital iT][sub 11] in the [pi][sup +][ital d][r arrow][ital pp] reaction in the energy region [ital T][sub [pi]]=350--450 MeV

The vector analyzing power [ital iT][sub 11] of the reaction [pi][ital d][r arrow][ital pp] was measured at [ital T][sub [pi]]=350, 400, and 450 MeV. The results obtained at [ital T][sub [pi]]=350 MeV are in agreement with earlier measurements of [ital iT][sub 11] at 325 MeV. With increasing energies our results show a marked increase in the vector analyzing power up to a value close to its theoretical limit at [ital T][sub [pi]]=450 MeV ([radical][ital s] =2.40 GeV). In this energy region broad structure has been found in earlier measurements of [ital d][sigma]/[ital d][Omega] and [ital A][sub [ital y]0].