Seminar “Nuclear Theory”

Date and Time: Monday, 15 February 2021, at 3:30 PM

Venue: Online conference on Zoom, Bogoliubov Laboratory of Theoretical Physics

Seminar topic: «Relativistic corrections to the form factors of three-nucleon nuclei»

Authors: S. G. Bondarenko, V. V. Burov, S. A. Yurev

Speaker: S. A. Yurev

Abstract:

Three-nucleon nuclei(³He and ³H) were considered in the framework of the relativistic covariant Bethe-Salpeter approach. The amplitudes of states of nuclei obtained from the solution of the Bethe-Salpeter-Faddeev equation were used to calculate the form factors of the helion and triton. The form factors of nuclei are calculated for the momentum transfer square up to 50 fm⁻² using various models of nucleon form factors a dipole fit, a relativistic harmonic oscillator model, and a vector dominance model. When calculating the form factors, relativistic corrections are taken into account, such as the Lorentz transformations of the arguments of the wave function and the propagator, a simple pole in the propagator, and the Lorentz transformations of the arguments of the nuclear wave function. The calculation results showed a significant contribution of relativistic corrections. The calculation with multi-rank potentials reproduces the diffraction minimum observed in the experimental data, while taking relativistic corrections into account improves the agreement with experiment.