Measurement of the Tensor Analyzing Power T-20 for the Reaction ?d?pnp(0) in the Region of Low Proton Energies

In this paper, we present new experimental results for the tensor analyzing power T-20 of the reaction ?d?pnp(0) in the region of low proton energies. The results are presented in the photon energy range of 300 MeV < E? < 600 MeV and the proton energy range of 10 MeV < E-p < 40 MeV. The paper uses the experimental statistics accumulated at the VEPP-3 accelerator complex in 2013. To identify the events of the reaction ?d?pnp(0) , we used the registration of the proton and two 7-quanta from the decay p(0) ? 2? in coincidence. The experimental results were compared with the results of statistical simulation. To perform the statistical simulation, we used the unitary isobar model MAID 2007 for the elementary pion nucleon photoproduction amplitude and took into account pN and NN rescattering in the final state of the reaction ?d?pnp(0) .