Search academic texts

Information × Registration Number 0224U002878, 0121U108812 , R & D reports Title Studies on the properties of fundamental interactions in nuclear reactions, structure of exotic nuclei, high-energy physics, particle astrophysics, and cosmology popup.stage_title Head Korchyn Oleksandr Yu., д.ф.-м.н. Registration Date 09-03-2024 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 The method we developed earlier for determining the parameters of cosmological models that satisfy the cosmological principle is applied to a wide range of problems that lie beyond the boundaries of the standard cosmological model. An important advantage of the used approach is that the parameters of various models are expressed through a universal set of cosmographic parameters, so there is no need to introduce additional parameters, the determination of which requires special observations. As part of the study of weak decays of Bc mesons, exclusive half-lepton processes were considered, in which a pair of lepton and neutrino together with a vector or pseudoscalar meson is formed in the final state. Form factors, half-lepton decay widths, and branching fractions were calculated for such processes on the basis of the effective theory of heavy quarks, and the obtained results were compared with experimental data. A comparison of two approaches is made, namely, the in(out) formalism and the image of dressed particles in quantum theory, fields that allow one-particle states to be constructed, which are exact eigenstates of the full Hamiltonian. New three-nucleon operators have also been constructed forces between dressed particles, on the same physical basis as operators of two-particle interactions, thereby helping to eliminate the inconsistency present in existing theories of nuclear forces.  Product Description popup.authors Bolotin Yurii L. Zazunov Levon H. Cherkaskyi Vitalii O. Shebeko Oleksandr V. popup.nrat_date 2024-03-09 Close