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Information × Registration Number 0224U033141, (0123U103077) , R & D reports Title Research on electromagnetic processes and properties of coupled systems in high-energy physics popup.stage_title Розрахунок формфакторів дейтрона з врахуванням нових мезонних струмів. Визначення диференційного перерізу розсіювання швидких заряджених частинок на ультракороткому пучку релятивістських заряджених частинок конкретного виду в ейкональному наближенні квантової електродинаміки. Head Truten Ivan V., Registration Date 19-12-2024 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 The aim of this work is to develop an efficient technique for performing typical calculations in quantum electrodynamics and nuclear interaction theory, specifically describing bound states. As a result, the wave functions of the deuteron will be calculated (without using perturbation theory) and its electromagnetic properties will be investigated. In particular, operators for meson exchange currents will be constructed in the framework of dressed particles, deuteron form factors and electromagnetic moments will be calculated. Furthermore, the theory of describing the scattering process of fast charged particles on relativistic beams of charged particles will be developed. The goal is to obtain the differential scattering cross-section for a specific beam type in the eikonal approximation of quantum electrodynamics. Additionally, an observable dependent on the invariant energy of the process will be found, corresponding to the difference in average energies of the final bottom quark and antiquark. popup.description2  During the previous stage, using the method of unitary dressing transformations, new meson exchange current operators were constructed. Now the obtained current operators are used to describe the electromagnetic properties of the deuteron. For our model, the deuteron in the instantaneous form of relativistic dynamics is a bound state of a dressed neutron and proton on their mass shells. This allows us to get rid of non-relativistic uncertainties inherent in traditional approaches. In particular, there is no need to “invent” any models outside the energy shell for the vertices γN, γπ, γρ, etc. Special attention is paid to the problem of eigenvalues ​​and finding the states of the deuteron in a moving reference frame. The magnetic form factor of the deuteron was calculated taking into account both single-particle and two-particle currents. The corresponding structure function is completely determined by the magnetic form factor and is very sensitive to meson exchange currents. The problem of scattering of an ultrarelativistic charged particle on a beam of ultrarelativistic charged particles, in which the charge is distributed according to the Gauss law in the directions of all three coordinate axes, is considered. The wave function of the scattered particle is obtained in the eikonal approximation of quantum electrodynamics. Based on the obtained wave function, the corresponding differential scattering cross sections are calculated for different numbers of particles in the target beam. Product Description popup.authors Koriukina Viktoriia D. Kostylenko Yan O. popup.nrat_date 2024-12-19 Close