Angular distributions for the differential cross section and three deuteron analyzing powers ${\mathit{iT}}_{11}$, ${\mathit{T}}_{20}$, and ${\mathit{T}}_{22}$ of the reaction d→p${\to }^3$He${\mathrm{\pi }}^0$ have been measured over the whole angular domain at 20 energies close to threshold (0.03<${\mathit{T}}_{\mathrm{\pi }}^{\mathrm{c}.\mathrm{m}.\mathrm{}}$<10.2 MeV). The differential cross section and tensor analyzing power ${\mathit{T}}_{20}$ both show strong variation in energy and angle due to interference between S- and P-wave pion production, whereas ${\mathit{iT}}_{11}$ and ${\mathit{T}}_{22}$ remain consistent with zero over the whole experimental range. All the data at different energies and angles fall on universal curves when plotted as functions of the single variable ${\mathit{p}}_{\mathrm{\pi }}$cosΘ, evaluated in the c.m. The broad features of the results are in line with theoretical expectations. © 1996 The American Physical Society.

• Received 17 May 1996

DOI:https://doi.org/10.1103/PhysRevC.54.1732