Measurement of tensor analyzing powers of the incoherent pion photoproduction on a deuteron

Abstract Three components of the tensor analyzing power of the exclusive π − meson photoproduction on a deuteron, γ d → p p π − , are measured simultaneously for the photon energy range ( 300 – 900 ) MeV , detecting a pair of protons in the energy range ( 50 – 200 ) MeV . The experiment made use of an internal tensor-polarized deuterium gas target of the VEPP-3 electron storage ring and the two-proton coincidence recording method. The results obtained are compared with theoretical predictions within the framework of the diagrammatic approach.