Tensor analyzing power component T20 of the γd→→π0d process in the photon energy range from 200 to 400 MeV

• Main Authors: H. Al-Ghamdi, E.S. Almogait, E.M. Darwish, S. Abdel-Khalek
• Format: Article
• Language: English
• Published: Elsevier 2020-09-01
• Series: Results in Physics
• Subjects: Meson production; Photoproduction reactions; Polarization phenomena in reactions; Spin observables; Polarized targets
• Online Access: http://www.sciencedirect.com/science/article/pii/S2211379720317058

The tensor analyzing power component, T20, of the γd→→π0d process in the photon energy range from 200 to 400 MeV is investigated. This work is motivated by the most recent and unique measurements from the VEPP-3 electron storage ring at the Budker Institute of Nuclear Physics in Novosibirsk, Russia. We point out a special sensitivity of T20 to the elementary γN→πN amplitude and to the realistic NN potential model adopted for the deuteron wave function at backward pion angles, especially in the region 90°<θ<150°. The estimated results for T20 are compared with the experimental data from VEPP-3 and a satisfactory agreement is obtained at incident photon energies below 375 MeV. At higher photon energies and extreme backward pion angles, the estimated results of T20 considerably underestimate the data.