The study of the hadron matter properties under extreme conditions of baryons high density, energy and strong electromagnetic fields in heavy ion collisions is one of the most important problems of modern high-energy physics. One of the possible ways to study the properties of quark-gluon plasma is the so-called electromagnetic probes - photons and leptons. Since these particles freely leave...
Following the study for SU(2) case with zero bario -chemical potential, a dual QCD formulation for SU (3) color gauge has been proposed to be 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...
The relativistic rotation causes a change in QCD critical temperature. Various phenomenological and effective models predict a decrease in the critical temperature in rotating QCD. Nevertheless, it follows from lattice simulations that the critical temperature in gluodynamics increases due to rotation. But in QCD the rotation acts on both gluons and fermions, and combination of these effects...
Relativistic rotation may have some impact on various properties of quark-gluon plasma. For example, lattice simulations show an increase in critical temperature of both QCD and gluodynamics due to rotation. In this report the first lattice study of an effect of rotation on gluodynamics’ equation of state will be presented. In particular, it will be shown that in deconfinement phase rotation’s...
The talk is devoted to an explicit cutoff regularization of the Green's function for a covariant Laplace operator. It is planned to give definitions, explain properties (spectral representation, homogenization, covariance), and formulate results for the case of the four-dimensional Yang-Mills theory.
In this work forward proton scattering in association with lepton pairs produced via the photon fusion mechanism process was studied. The ATLAS collaboration
has managed to measure the cross sections of the process above. Here analytical formulas for the corresponding cross-sections were derived. These formulas allow for simple numerical integration instead of the usual Monte Carlo approach...
We consider the class of spinning particle theories, whose quantization corresponds to the continuous helicity representation of the Poincare group. The classical trajectories of the particle are shown to lie on the parabolic cylinder with a lightlike axis irrespectively to any specifics of the model. The space-time position of the cylinder is determined by the values of momentum and total...
Semileptonic flavor changing neutral current transitions with a pair of neutrinos in the final state are very accurately determined in the standard model (SM) and thus provide an accurate and sensitive probe for physics beyond the SM. Until recently, the poor tagging efficiency for the $B\to K^{(*)}\nu\bar{\nu}$ modes made them less advantageous as a probe of new physics (NP) compared to the...
The analytical calculation of Feynman integrals is an important problem in modern quantum field theory. This task is important both for obtaining the most accurate predictions for observable quantities and for some areas of pure mathematics such as theory of periods in algebraic geometry. Nevertheless, it is not always possible to obtain analytical solutions for all Feynman integrals beyond...
The physics of bottom hadrons plays a fundamental role both in the precision tests of the Standard Model (SM) and in searches of possible New Physics (NP). Rare B-meson decays, which are induced by the Flavor-Changing Neutral Currents (FCNCs) $b \to s (d)$ transitions, provide a stringent test of the SM in flavor physics. Being loop-induced in the SM, these transitions are suppressed and NP...
A method of solving of QED evolution equations for parton distibution functons
in the leading and next-to-leading orders is discussed. This method is a reduction
to QED of the method of iterative solution of DGLAP equations in QCD. Spacelike parton distributon
functions (PDFs) of positron in electron are calculated to the third order.
We consider process-independent PDFs $D_{e \bar{e}}$...
The field theory of open quantum systems has ample applications in areas like particle or nuclear physics, cosmology and quantum gravity. Open quantum systems are commonly described by reduced density matrices, which are obtained by tracing out the environmental degrees of freedom, and whose evolution is given by quantum master equations. Solving such equations often poses an intricate or even...
The properties of the collective low-lying states of Zr isotopes indicate that some of these states are mainly spherical and the other are mainly deformed ones. In our previous works, it was shown that the structure of low-lying collective states of 96Zr can be satisfactorily described within the framework of a geometric collective model based on the Bohr Hamiltonian with a potential that...
In early (e,e') experiments of TU-Darmstadt group, some dipole states at 8-11 MeV in 58Ni
demonstrate enhanced transverse form factors. In this connection, we explored a possible toroidal
nature of these states using the fully self-consistent Quasiparticle Random-Phase Approximation
approach with Skyrme forces SVbas, SkM* and SLy6. The main attention was paid to well assigned
8.24 MeV 1-...
V. O. Nesterenko$^{1,2}$, M.A. Mardyban$^{1,2}$, P.-G. Reinhard$^3$, A. Repko$^4$.
$^{1}$Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow Region 141980, Russia
$^{2}$ Dubna State University, Dubna, Moscow Region 141982, Russia
$^{3}$ Institut für Theoretische Physik II, Universität Erlangen, D-91058, Erlangen, Germany
$^{4}$Institute of Physics,...
We demonstrated resonance effects in a system of nanomagnet coupled to the Josephson junction under the influence of external periodic drive. We show that the applied periodic drive brings to the appearance of additional resonance peaks, which positions determine by the driving frequency. The heights of the resonance peaks depend on the driving amplitude as a Bessel function. We develop a...
The anomalous Josephson structures with coupled superconducting and magnetic characteristics allows the manipulation of magnetic properties by Josephson current [1]. In junctions with a strong spin-orbit coupling (φ0 Josephson junction), we demonstrate an appearance of additional fractional subharmonic steps in the IV-characteristics under external electromagnetic radiation due to spin-orbit...
The goal of this project is to get the strong interaction of ultracold rotating dipole molecules. Initially, this interaction is weak at large distances. If the molecules are close enough to each other, chemical changes can occur. But we know that the Rydberg atom has a large dipole moment and a long lifetime. Therefore, we want to use it as a mediator of interaction between molecules.
We...
The IceCube neutrino observatory measures the diffuse flux of high-energy astrophysical neutrinos by means of various techniques, and there exists a mild tension between spectra obtained in different analyses. The spectrum derived from reconstruction of muon tracks is harder than that from cascades, dominated by electron and tau neutrinos. If confirmed, this tension may provide a clue to the...
Neutron stars are hydrostatically equilibrium stars, the matter of which consists mainly of neutrons and has a density of the order of the nuclear one, therefore, methods used in the particle and nuclear physics are applicable for their description. However, at high densities that are achieved in neutron stars, there may be additional sensitivity to certain properties of the baryonic...
We have theoretically investigated the molecular orientation by a asymmetric potential created by the superposition of two-color laser fields. The time-dependent Schrodinger equation is solved numerically for different field parameters. We have compared the quantum dynamics with the solution of the classical equations and have described the conditions, where the classical physics description...
We propose and study the new (generalized) E-type $\alpha$-attractor models of inflation, in order to include formation of primordial black holes (PBHs). We numerically investigate the phases of inflation, derive the power spectrum of scalar perturbations, and calculate the PBHs masses. For the certain values of the parameters, the asteroid-size PBHs can be formed with the masses of $10^{17}...
We review the mathematical foundations of Exceptional Drinfel'd Algebras. We present a brief account of Manin Triples which defines the algebra corresponding to T-duality and review the mathematical derivation of Exceptional Drinfel'd Algebras which constitute the algebra defining U-dualities. We present our results of classification of all 4+6 dimensional Exceptional Drinfel'd Algebras and...
We investigate the equations of motion for a free point string on five-dimensional Sasaki-Einstein manifolds Yp,q/Lp,q,r. This results in Fuchsian equations with four singularities or a Heun equations. The asymptotic solutions of these equations are obtained through isomondromic deformation and are related to the sixth Painlevé equation. We derive the flows generated by the coalescence...
We study deuteron charge radius in the framework a hard-wall AdS/QCD model. We present basic elements of the hard-wall model, write metric for the AdS space. We introduce a vector field with twist $\tau=6$ describing deuteron in the bulk of AdS space and other vector field to describe photon respectively, write an effective action for the bulk fields interactions, find a $G_1(Q^2)$, $G_2(Q^2)$...
