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Presentation materials
The nuclear level densities and level-density parameters in fissioning nuclei at
their saddle points of fission barriers, as well as those for neutron, proton, and alpha particle emission residues at the ground states are calculated for isotopic chains of superheavy nuclei with Z = 114 โ 120. The calculations are performed with superfluid formalism using the single-particle energies obtained...
Using the microscopic-macroscopic approach based on the modified two-center shell model, ground-state shell corrections for even Z superheavy nuclei in the alpha-decay chains containing of A=295-300,302,304, Z=120 and the low-lying one quasiparticle spectra for 251Cf, 243Cm, 255Fm, 243Bk, and 251Es are calculated and compared with available experimental data. The calculations are successful in...
The non-product noncommutative spectral geometry allows for several generalizations of the classical general relativity. In particular, doubled geometry models possesses features characteristic to bimetric gravity theories. In my talk I will describe such models for the pair of FriedmannโLemaรฎtreโRobertsonโWalker metrics and discuss stability of possible solutions in several cosmological scenarios.
We investigate Kapitsa-like pendulum effects in the magnetic moment dynamics of a nanomagnet coupled to a Josephson junction under external periodic drive. Generated by the Josephson junction and external drive magnetic field play the role of the oscillating force of the suspension point in analogy with the Kapitsa pendulum. The high frequency oscillations change the position of stability of...
The work is devoted to the description of the spectra of the lowest states and transition probabilities for the chain of zirconium isotopes
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 triton and helion. The form factors of three-nucleon nuclei are calculated for the momentum transfer square up to 50 fm^-2...
Abstract: We study
In recent years, the study of light weakly bound nuclei has not become less interesting due to the development of both experimental facilities and theoretical approaches. The nucleus 9Be having Borromean structure was the subject of study on its manifestation of cluster in direct nuclear reactions [1]. In particular, it was found that in the 9Be(d,ฮฑ)7Li nuclear reaction the 5He heavy cluster...
The model of classical spinning particle is considered such that quantization of classical model leads to an irreducible representation of the Poincarรฉ group. The class of gauge equivalence of classical particle world lines is shown to form a 2-dimensional world sheet in 3-dimensional Minkowski space, irrespectively to any specifics of classical model. For massive particles, the world sheets...
We systematically study two-body nonleptonic decays of light lambda hyperon
with account for both short and long distance effects. The short distance effects are induced by five topologies of external and internal weak W ยฑ exchange, while long distance effects are saturated by an inclusion of the so-called pole diagrams with an intermediate 1/2+ and 1/2โ baryon resonances.
The contributions...
The QCD equation of state in presence of non-zero external magnetic field is studied using Dual QCD formulation. A Dual QCD formulation is constructed in terms of dual gauge potentials which takes into account the local as well as the topological structure of the color gauge group into its dynamics. The dynamical configuration of the resulting dual QCD vacuum and its flux tube configuration...
BMS (Bondi-Metzner-Sachs) group (and its various generalizations) at null infinity has been studied extensively in the literature as the symmetry group of asymptotically flat spacetimes. The intricate relationship between soft theorems and the BMS symmetries has also motivated the definition of such asymptotic symmetries to timelike infinity [M. Campiglia, Null to time-like infinity Greenโs...
The new approach based on the Cluster Perturbation Theory was applied to the Hubbard model to reveal the effect of electron-electron interaction on the topological band structure.
In contrast with the all existing approaches based on mean field approximation our technique allows to obtain the qualitative changing in the structure of Hofstadter butterfly in the presence of Coulomb repulsion....
In order to calculate potential energy of two reacting heavy ions different methods are applied. The folding procedure with effective nucleon-nucleon interaction and effective internucleus potentials are widely used [1].
In this report the calculations of diabatic potential energy are carried out for spherical even-even nuclei with Z, N โฅ 8. Potential is obtained with internucleon Migdal...
Confinement phenomenon in QCD has been of great interest to theoretical physics for more than five decades. This phenomenon can be crudely described as the absence of free quarks (or other colored particles) in the physical spectrum. Thus formulated, confinement may seem simple at first sight, but to anyone who has studied this phenomenon one thing is clear: the picture of confinement in gauge...
One of the most important tasks of modern science is the search for the so-called "new physics" beyond the SM (BSM). The most promising method which is used in this quest is the search for deviations from the SM at the LHC as well as on other accelerators and experiments. At the same time, it should be noted that the vast majority of calculations in the SM are done within the framework of...
In this work, the Coulomb breakup of one-neutron halo nuclei has been studied within the non-perturbative time-dependent approach from intermediate (70 MeV/nucleon) to low energies (5 MeV/nucleon) including the low-lying resonances in different partial and spin states of 11Be. We have shown that the inclusion of the resonant states of 11Be into the computational scheme leads to a significant...
The work is devoted to the study of the shapes of the Mo isotopes chain based on the collective model with the Bohr Hamiltonian. Isotopes of even nuclei Mo, namely 94Mo, 96Mo, 98Mo and 100Mo, demonstrate a change in shape from nucleus to nucleus. The low-lying spectrum of these nuclei indicates that the 94Mo nucleus has a spherical structure, 96Mo and 98Mo has a transformed transition, and...
The phenomenon of superdeformation was used many years ago to explain the fission isomers observed in the actinide nuclei. The curiosity for the superdeformation phenomena increased exponentially when a SD band in the 152Dy nucleus was observed. Many surprising properties of SD nuclei were observed experimentally, such as constant energy spacing between the transitions, lack of the transition...
The quantum problem of three bodies with Coulomb interaction is one of the most notable
nonintegrable problems in quantum mechanics. At the same time, extremely accurate numerical
solutions for the problem of bound states for a system of three particles may be obtained with modern
computers. For example, the nonrelativistic energy of the ground state of helium with a nucleus of an
infinite...
we study the rare decays corresponding to b โ d transition in the framework of the covariant confined quark model. Using the form factors, we compute the branching fractions of the rare decays and our results are found to be matching well with the experimental data. We also compute the ratios of the branching
fractions of the b โ s to b โ d rare decays using the inputs from previous papers on...
We consider a class of theories with unfree gauge symmetry, such that gauge parameters are restricted by differential equations. This class of theories is shown to admit global conserved quantities, whose on-shell values are defined by asymptotics of the fields rather than Cauchy data. A systematic way is proposed for deducing the global conserved quantities proceeding from the equations...
The study of nuclear giant resonances has long been a subject of extensive theoretical and experimental research. Experimental data on giant resonances have allowed us to determine fundamental properties associated with the nuclear interaction in the nuclear medium. In particular, the study of the giant dipole resonances (GDR) is expected to provide information on the symmetry energy term of...
In recent years, two-dimensional (2D) systems of polar diatomic molecules with anisotropic interaction have attracted increased interest. Studies of the interactions of dipole diatomic molecules are also relevant due to their possible applications as qubits for quantum computing schemes.
We revealed the strong dependence of the angular distributions of the 2D dipolar scattering differential...
This report is devoted to the study of the influence of relativistic rotation on the confinement/deconfinement transition in gluodynamics within lattice simulation. To investigate the phase transition the Polyakov loop and its susceptibility are calculated for various lattice parameters and the values of angular velocities which are characteristic for heavy-ion collision experiments. Different...
We consider the theory of Rarita-Schwinger field interacting with a field with spin 1/2, in the case of finite temperature, chemical potential and vorticity, and calculate the chiral vortical effect for spin 3/2. We have demonstrated the role of interaction with the spin 1/2 field, the contribution of the terms with which to CVE is 6. Since the contribution from the Rarita-Schwinger field is...
The purpose of the article is to theoretically evaluate the possibility of determining the value of the neutrino (antineutrino) mass in the beta decay process by measuring the relative characteristics of asymmetries and polarizations.
Research procedure and methods. The idea of โโthe method in calculating the squares of matrix elements and in minimizing the influence of poorly studied...
