Measurement of the tensor analyzing power T20 for incoherent π− photoproduction on a deuteron above the first resonance region

Le résumé fourni par la source

New measurements of the T 20 component of tensor analyzing power in the reaction γ d → p p π − for photon energies 400 − 700 MeV are presented. The experiment was carried out on an internal tensor-polarized gas deuterium target of the VEPP-3 electron storage ring in 2023 with the use of tagged quasi-real photons and two-proton coincidence. For determination of T 20 , the asymmetry caused by a change of the sign of the tensor polarization of the deuteron target was measured. The new data are compared with the results of theoretical calculations based on the quasi-free approximation including πN and NN rescattering effects.

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