The talk consists of two parts: "official" and research. (1) We discuss several active projects in the fiels of fundamental low-energy nuclear physics aiming the development in RF the world-level large-scale research infrustructure. (2) We review the status of studies for several extreme neutron-rich systems - 4n, 6H, 7H, 26O - which both remain a challenge to experiment and require unusual...
QCD phase diagram and in particular color superconducting phenomnon has been considered with non-zero chiral imbalance in the framework of effective model. Isospin as well as two types of chiral imbalance has been considered. It is a continuation of our studies of the same situation but in 2 color QCD, JHEP 06 (2020) 148, Phys.Rev.D 106 (2022) 4, 045008.
It was investigated how the chiral...
In SU(3) Polyakov linear sigma model (PLSM), in which the chiral symmetry and gluomic degrees of freedom are integrated in the hadronic and partonic phase, the QCD phase structure and its magnetic properties are analyzed in thermal and dense medium, at finite magnetic field. Both Landau quantization and magnetic catalysis are implemented so that magnetization, magnetic susceptibility and...
Neutron stars are considered as natural laboratories for testing the properties of cold and dense nuclear matter. Knowledge of various microphysical properties of such matter is necessary to link the nuclear matter theory with the astrophysical observations.
In this talk we consider kinetic coefficients (thermal conductivity, shear viscosity, momentum transfer rates) of the magnetized...
The talk presents the results of a series of works [1-6] on modeling the outer layers (crust) of neutron stars in close binary systems with a low-mass companion star. The matter of the crust consists of atomic nuclei immersed in a background of degenerate electrons and, in the inner parts of the crust, neutrons. Due to accretion, the original crust is replaced by the accreted matter. The talk...
Forces with a large radius of interaction can have a significant impact on the equation of state of matter. Low-mass neutrinos generate a long-range potential due to the exchange of neutrino pairs.We discuss a possible relationship between the neutrino masses, which determine the interaction radius of the neutrino-pair exchange potential, and the equation of state of neutron matter. Contrary...
I shortly review the current status of stripping model for short gamma-ray bursts. The focus will be on the nuclear data needed to accurately simulate the various steps of the model. Namely: to describe a) the slow decompression of the neutron star matter during the stripping itself and b) the rapid decompression of the rest of the NS matter during its explosion. In addition, I will talk about...
Relativistic rotation causes a change of QCD critical temperatures. Various phenomenological and effective models predict a decrease of the critical temperatures in rotating QCD. Nevertheless, lattice simulations showed that the critical temperature in gluodynamics increases due to rotation. We extend the lattice study to the theory with dynamical fermions. In this report we present the first...
We review recent studies of vortical motion and the resulting polarization of $\Lambda$ hyperons in heavy-ion collisions at NICA energies, in particular, within the model of three-fluid dynamics (3FD). This includes predictions of the global $\Lambda$ polarization and ring structures that appear in Au+Au collisions. The global $\Lambda$ polarization in Au+Au collisions is calculated, including...
Modified Fayans functional. Description of nuclear ground state properties and spin-isospin response.
The isovector volume term of Fayans energy density functional DF3-f [1] is extended. The corresponding parameter h-2 is determined in [2] making use of experimental and theoretical constraints derived recently for the parameters of nuclear matter equation of state: the symmetry energy J and...
Phase transitions in nuclear matter will de discussed.
The appearance of anisotropic nuclei in the crust of neutron stars, called the pasta phase, can impact several macroscopic properties, e.g. cooling, magnetic field evolution and gravitational wave emission. In this talk, we will discuss some properties of the pasta such as impurities, conductivity and whether nucleon correlations can inhibit its appearance in the context of relativistic mean...
We investigate the vacuum structure of Abelian compact electrodynamics and Non-Abelian Yang-Mills theories in the presence of (chromo)metallic mirrors at zero temperature in 3+1 dimensions. By studying Abelian monopoles, responsible for linear confinement between opposite electric charges, we show that as the distance between plates diminishes, the vacuum of cQED between plates experiences a...
By the example of selected iron group nuclei and neutron-rich nuclei with N≈50, the influence of temperature on the rates and cross sections for various weak-interaction reactions (electron capture, inelastic neutrino scattering, etc.), which play an important role in the late stages of massive star evolution, is studied. It is shown that thermodynamically consistent incorporation of thermal...
Nucleosynthesis at large magnetic induction relevant for core-collapse supernovae, and neutron star mergers is considered. For respective magnetic fields of a strength up to ten teratesla atomic nuclei exhibit linear magnetic response due to the Zeeman effect. Such nuclear reactivity can be described in terms of magnetic susceptibility. Susceptibility maxima correspond to half-filled shells....
TBA
The production of nuclei and hypernuclei is of interest for the experimental and theoretical studies: it is a big question how such weakly bound objects survive in a hot dense environment and which new insight on the heavy-ion collisions dynamics they can bring us. We present the results on the cluster production study using different transport approaches and clusterization algorithms at the...
ELECTRIC DIPOLE VORTICITY IN NUCLEI V.O. Nesterenko Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia During last decades, the intrinsic nuclear vorticity associated with toroidal E1 excitations attracts a high attention. We briefly discuss some basic aspects and recent progress in this...
Sound propagation in a neutron star with quark matter droplets immersed into it displays a highly nonlinear behavior. The sound speed has a dip-bump structure and may reach the conformal limit
We discuss the behavior of the dilepton production rate near the QCD critical point and the critical temperature of color superconductivity. We show that the rate is anomalously enhanced there due to the development of the soft mode associated with the second-order phase transitions. Possible experimental observation of these enhancements in relativistic heavy-ion collisions will be discussed....
Detectability of the $r$-mode gravitational-wave signal depends on the interplay between the mode amplification by the CFS instability and its damping by dissipative mechanisms, operating in the stellar matter. Those stellar parameters - usually, the angular velocity, $\Omega$, and redshifted temperature, $T^\infty$, - for which the mode is unstable, define the $r$-mode instability window. We...
Until recently the influence of relativistic rotation on the properties of quark-gluon plasma was studied analytically only via phenomenological and effective models. Now, with lattice methods becoming available, the properties of rotating QCD or rotating gluodynamics can also be probed numerically. For example, lattice simulations suggest an increase in the gluosynamics’ critical temperature...
The Nuclotron at JINR in Dubna is capable of accelerating beams of heavy ions such as xenon, gold and bismuth at energies up to 4A GeV and intensities up to 2.5∙106 ions/s. These energies and collision systems are well suited for experiments devoted to the study of the properties of dense baryonic matter, such as the equation-of-state and new microscopic degrees-of-freedom which might emerge...
The nucleon density profiles of spherical nuclei are calculated within the self-consistent HFB approach based on the non-covariant energy density functional. For the reactions with light nuclei, the nucleus–nucleus interaction potentials are calculated in the double-folding form with these nucleon densities. The characteristics of the Coulomb barriers obtained are in good agreement with those...
Classification is given of different types of mixed nuclear matter containing hadron and quark degrees of freedom, including the following types: (i) Nuclear matter with admixture of multi-quark clusters, (ii) Stratified quark-hadron mixture, (iii) Stratified hadron-hadron mixture, (iv) Multicomponent quark-hadron matter, (v) Heterophase quark-hadron matter. Methods of describing these systems...
We calculate the pressure of the interacting pion gas using the Beth-Uhlenbeck approach to the relativistic virial expansion with Breit-Wigner phase shifts for the sigma - and pi- meson resonances. The repulsive phase shift delta_20 is taken from quark interchange model of Barnes and Swanson [Phys. Rev. D 46 (1992) 131] in very good agreement with experimental data. In this work we show that...
We consider a relativistic quantum fluid moving with vorticity and acceleration. It is shown that despite the space flatness, there is an effect directly related to gravity. Namely, an axial current arises, which depends on the acceleration and vorticity of the medium, and the conductivity in this current is determined by the gravitational quantum anomaly. This effect was called the Kinematic...
A sharp peak in the ratio of strange to non-strange mesons in relativistic heavy-ion collision is discussed in the framework of the SU(3) Polyakov-loop extended NJL model with vector interaction. In the model, the $K^+/\pi^+$ ratio was calculated along the chiral phase transition line for different values of the vector coupling $g_V$. We showed that the value of the vector coupling had no...
Studying of the properties of baryonic interactions is one of the important problems of nuclear physics. Nowadays nucleon-nucleon interaction is studied much better than hyperonic interactions. There are some models of hyperonic interaction, based on experiments with hypernuclei, but substantial uncertainties still remain.
Studying of neutron stars can be promising for understanding the...
QCD predicts that with increasing baryon density the chiral symmetry gets
gradually restored due to the disappearance of the scalar $\bar q q$ condensate. This should result in the appearance of the parity doublets in the spectrum of hadrons, like $(\pi,\sigma)$, $(\rho,a_1)$, $(N,N^*(1535))$ etc. In order to connect this prediction with observables one needs to properly modify relativistic...
The γγ-decay reactions are formally analogous to neutrinoless double-β decay processes where in the latter two β-particles and in the former two γ-quanta appear in the final state and share the total energy of the nuclear transition. This paper reports on the situation, in which the γγ-decay of the low-energy quadrupole state occurs in a nuclear transition which could proceed by a single-γ...
Bayesian Inference is a powerful statistical tool for analysis in case of rare and uncertainty data, which is applied for analysis of EoS models based on multimessenger M-R data. The aim of this analysis is to bring the quantitative measure for different physical models of stellar matter. One of the most common approaches to the implementation of Bayesian analysis is the study of the physical...
Short-range correlated (SRC) NN pairs play an important role in structure of atomic nuclei and are studied using mainly electron beams [1]. A new step was done at BM@N in JINR [2] where the reaction 12C+p→10A+pp+N is studied using the $^{12}$C beam at energy of 4 GeV/nucleon in inverse kinematics providing interaction with the hydrogen target to probe the SRC pairs in the $^{12}$C. In...
We study the Roberge-Weiss phase transition numerically. The phase transition is associated with the discontinuities in the quark-number density at specific values of imaginary quark chemical potential. We parameterize the quark number density by the polynomial fit function to compute the canonical partition functions. We demonstrate that this approach provides a good framework for analyzing...
The production of twisted (vortex) particles in noncentral heavy-ion collisions is rather ubiquitous. Photons emitted in such collisions due to the rotation of charges are highly twisted. Charged particles are produced in non-spreading multiwave states They have significant orbital angular momenta. We expect wide dissemination of emission of twisted particles in noncentral heavy-ion collisions.
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...
All aspects of the Principle of General Covariance can be formulated on the basis of the seminal papers Einstein and Grossmann (1913) and Einstein (1914). This principle should be considered as the fundamental principle of nature and not just of general relativity, since there is too intimate connection between gravity and the rest to be considered separately. Really, one can show that the...
We discuss the enhancement in the spin polarization of anti-hyperons compared to the polarization of the hyperons in noncentral relativistic heavy-ion collisions at low energies. We argue that this enhancement arises from an interplay between the chiral vortical effect and its helical counterpart. Furthermore, we show that the chiral/helical mechanism can reasonably well describe, without any...
