V. F. Dmitriev

Measurement of tensor analyzing powers in deuteron photodisintegration

A new accurate measurement of the tensor analyzing powers T20, T21, and T22 in deuteron photodisintegration has been performed. Wide-aperture nonmagnetic detectors allowed broad kinematic coverage in a single set up: E(gamma)=25 to 600 MeV, and theta(p)(cm)=24 degrees to 48 degrees and 70 degrees to 102 degrees . The new data provide a significant improvement over the few existing measurements. The angular dependency of the tensor asymmetries in deuteron photodisintegration is extracted for the first time.

Experiments with internal targets at the VEPP-3 electron storage ring

An overview of the recently completed, current, and planned experiments with internal targets at the VEPP-3 electron-positron storage ring in Novosibirsk is given. The results of the experiment to separately measure the deuteron form factors in elastic ed scattering in the range of momentum transfer Q2 = 8−15 fm−2 are provided. The results of measuring the tensor analyzing power components of the tensor-polarized deuteron photodisintegration reaction in the range of γ-quantum energies Eγ = 25−600 MeV are presented. The tensor analyzing powers of the coherent photoproduction of a neutral pion on a tensor-polarized deuteron have been measured for the first time. The almost-real photon tagging system being created is discussed. The status of the experiment under way to determine the contribution of two-photon exchange to the elastic ep scattering cross section is described.

Isoscalar amplitude dominance in e + e − annihilation to N N̄ pair close to the threshold

We use the Paris nucleon-antinucleon optical potential for explanation of experimental data in the process e+e− → pp̄ near threshold. It turns out that final-state interaction due to Paris optical potential allows us to reproduce available experimental data. It follows from our consideration that the isoscalar form factor is much larger than the isovector one.

Measuring tensor analyzing power component T 20 of the coherent photoproduction of a neutral pion on a tensor-polarized deuteron in the VEPP-3 storage ring

An experiment to measure tensor analyzing power component T20 of the coherent photoproduction reaction of a neutral pion on a tensor-polarized deuterium target

Effect of polarization on the cross section for the reaction 11B(p,α)8Be* and angular distributions of its products

\left( {\gamma \vec d \to d\pi ^0 } \right)

Two-photon exchange and elastic scattering of positrons/electrons on the proton

is described. Measurements are made in two kinematic ranges: photon energy Eγ = 200–500 MeV and neutral pion escape angle

Measurement of the tensor analyzing powers T20 and T21 in elastic electron-deuteron scattering.

\Theta _{\pi ^0 }^{cm} = 100^ \circ - 140^ \circ