Vector analyzing power ${\mathit{iT}}_{11}$ in the ${\mathrm{\pi }}^{+}$d→pp reaction in the energy region ${\mathit{T}}_{\mathrm{\pi }}$=350–450 MeV

The vector analyzing power ${\mathit{iT}}_{11}$ of the reaction πd→pp was measured at ${\mathit{T}}_{\mathrm{\pi }}$=350, 400, and 450 MeV. The results obtained at ${\mathit{T}}_{\mathrm{\pi }}$=350 MeV are in agreement with earlier measurements of ${\mathit{iT}}_{11}$ 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 ${\mathit{T}}_{\mathrm{\pi }}$=450 MeV (√s =2.40 GeV). In this energy region broad structure has been found in earlier measurements of dσ/dΩ and ${\mathit{A}}_{\mathit{y}0}$.