International Workshop “Infinite and Finite Nuclear Matter” (INFINUM-2025)

Contribution List

3. Active role of gluons in multiparticle production.

Prof. Elena Kokoulina (JINR)

Long-term studies of multiparticle processes indicate an ever-increasing role of the gluon component of hadrons and its active participation in the formation of secondary hadrons. The gluon dominance model, taking into account the stage of the quark-gluon cascade, based on PT QCD and hadronization, described by a phenomenological scheme is consistent with experimental data well.
The...

40. Applications of dual symmetries of QCD

Roman Zhokhov-Larionov (IHEP, IZMIRAN)

It has been shown in the framework of effective models that QCD phae diagram as in thee color cas as well as in two color one possesses dualities.
I means that various phenomena are dual with respect to each other. Then dualities were shown in a more and more general setings. And then finally dualities has been shown from first principles,
three dualities as in two color QCD and one in...

5. Chiral and deconfinement thermal transitions at finite quark spin density in lattice QCD

Dr Artem Roenko (JINR, BLTP)

We study the effect of finite spin quark density on the chiral and deconfinement thermal transitions using numerical simulations of lattice QCD with two dynamical light quarks. The finite spin density is introduced by the quark spin potential in the canonical formulation of the spin operator. We show that both chiral and deconfinement temperatures are decreasing functions of the spin...

16. Classical and quantum shear

Oleg Teryaev (JINR)

The structures of classical Energy-momentum tensor (EMT) are related to the ones appearing in the hadronic matrix elements of quantum EMT operator. The crossing properties of the latter allow one to establish relations between seemingly different processes.
The structures corresponding to shear viscosity contribution require (naive) T-violation in the hard exclusive hadron scattering channel...

23. Cluster production as a probe of EoS in HICs

Prof. El PHQMD Team

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34. Cluster production as a probe of EoS in HICs

Dr Viktar Kireyeu (JINR)

We investigate the sensitivity of the light nuclei and hypernuclei production to the strongly interacting nuclei matter equation-of-state (EoS) within the Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) microscopic transport approach.

41. Constraints on the nuclear Equation of State: From terrestrial experiments to neutron star observations

Walaa Seif (BLTP-JINR + Cairo University)

The equation of state (EoS) of asymmetric nuclear matter and its isospin dependence play a fundamental role in nuclear structure, reactions, and decays, as well as in neutron star properties and formation. To constrain the EoS robustly, studies must span extreme densities and pressures across nuclear and astrophysical systems. A well-determined EoS would provide critical insights into...

36. Description of low energy fragmentation reactions in the transport-statistical approach

Tatiana Mikhailova (LIT, JINR)

Fragmentation reactions at energies from 35 to 140 MeV per nucleon are a powerful tool to obtain new isotopes far from stability line. To plan the future experiments model calculations should be performed. Usually models developed to describe relativistic heavy-ion collisions are used for this purpose, like the EPAX and the Abration-Ablation models. They perfectly predict the cross-sections...

28. Description of nucleus-nucleus interaction using the Skyrme energy density functional

Mikhail Kosarev (Lomonosov Moscow State University Branch in Sarov, BLTP, JINR)

M.S. Kosarev$^{1,2,3}$, N.V. Antonenko$^{1}$, N.N. Arsenyev$^{1}$, and A.P. Severyukhin$^{1,4}$
$^1$ Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
$^2$ Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia
$^3$ Branch of Lomonosov Moscow State University in Sarov, Sarov, 607328, Russia
$^4$ Dubna State...

15. Directed flow in heavy-ion collisions at high baryon densities

Prof. Yuri B. Ivanov (BLTP JINR)

Results of simulations of directed flow of various hadrons in Au+Au collisions at collision energies $\sqrt{s_{NN}}=$ 3--4.5 GeV are presented. Simulations are performed within the model three-fluid dynamics and the event simulator based on it (THESEUS). The results are compared with available data. The directed flows of various particles provide information on dynamics in various parts and...

22. Directed flow of protons and deuterons in heavy-ion collisions at BM@N

Mikhail Mamaev (NRNU MEPhI)

In heavy ion collisions at the beam energy of several GeV per projectile nuclei hot and dense strongly interacting matter being produced at high baryon densities. One of the observables sensitive to the properties of this matter is the azimuthal anisotropy of the created in the collision particles. We present the results on the measured directed flow of protons and deuterons from the recent...

13. Dual QCD Quark hadron phase transition in presence of magnetic field

Dr Garima Punetha (LSM Campus, Soban Singh Jeena University Almora Uttarakhand, India)

To gain a deeper insight into the dynamics of the quark-hadron phase transition
under a magnetic field, the thermal characteristics of the non-perturbative
QCD vacuum have been studied. The dynamic arrangement of the resulting
dual QCD vacuum and its flux tube structure has been examined to investigate
the non-perturbative features of QCD. The partition function of quarks
and gluons in...

21. Fluctuation-induced first-order superfluid transition in unitary $SU(n)$ Fermi gases

Georgii Kalagov (BLTP JINR)

We use the functional renormalization group to study the superfluid phase transition in unitary $SU(n)$-symmetric Fermi gases. For $n \geq 4$ critical fluctuations invalidate mean‐field theory and drive the transition first‑order. We calculate the critical temperature and the jumps in the superfluid gap and the entropy density as functions of spin multiplicity $n$. All discontinuities grow...

1. Holographic model for neutron star with color superconductivity in the inner core

Mr Nguyen Hoang Vu (BLTP-JINR)

In this project, we use the Einstein Gauss Bonnet gravity for this holographic model. The crust contains baryon phase correspond the instanton gas in AdS soliton solution and the core color supeconductivity (CSC) phase correspond to the AdS black hole. We use this model to compute the equation of state of this type of compact star

7. Hypernuclear Properties and Hyperonic Interactions

Tatiana Tretyakova (SINP MSU)

Hypernuclei remain for a long time the major source of information on hyperonic interactions in nuclear environments. This information is useful for neutron star and heavy ion fields.

We discuss some topics on the modern status and recent progress in hypernuclear studies. Particularly, we consider exotic Λ hypernuclei with nuclear cores close to the drip lines. In some cases, the hyperon...

9. Implications of dense matter properties on neutron-star thermal evolution on various time scales

Alexander Potekhin (Ioffe Institute)

Interplay between recent progress in studies of thermal evolution of neutron stars and dense matter theory is discussed. Consideration is limited to the nucleonic composition of neutron-star interior. Passive cooling of isolated neutron stars is considered along with heating and cooling of accreting neutron stars in binary systems. Cases of practical interest are highlighted, where the usual...

29. Instability windows of relativistic r-modes in hyperonic stars

Kirill Kraav (Ioffe Institute)

$R$-modes are oscillations of rotating stars, restored primarily by Coriolis force. Of all oscillations, they are the most susceptible to the Chandrasekhar-Friedmann-Schutz instability with respect to emission of gravitational waves. This instability makes them particularly promising targets for current and future gravitational wave searches. In order to develop, the CFS instability should...

2. Introduction

Dr Evgeni Kolomeitsev (BLTP, JINR, Dubna)

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32. Investigation of the structure of the lowest quadrupole excitations in Ge isotopes

Evgenii Mardyban (JINR BLTP)

At present, a lot of experimental information has been accumulated on the structure of low-lying excited states in Ge isotopes. Interest in these nuclei is due to the fact that with an increase in the number of neutrons there is a transition between spherical and deformed forms of the nucleus that determine their structure. On the other hand, microscopic calculations show that Ge isotopes are...

26. Light nuclei and hypernuclei production based on THESEUS event generator

Marina Kozhevnikova (JINR)

The thermodynamical approach to light (hyper)nuclei production in heavy-ion collisions and its implementation in the new version of the generator THESEUS (Three-fluid Hydrodynamics-based Event Simulator Extended by UrQMD final State interaction) are reviewed.
In this approach light (hyper)nuclei are treated on the equal basis with hadrons, i.e. using only thermodynamic quantities deduced...

31. Low-energy spectra of nobelium isotopes

Maria Mardyban

V.O. Nesterenko, M.A. Mardyban, A. Repko, R.V. Jolos and P.-G. Reinhard

The low-energy multipole spectra in isotopes 250-262No are investigated in the framework of fully self-consistent Quasiparticle-Random-Phase-Approximation (QRPA) method with Skyrme forces SLy4, SLy6, SkM* and SVbas [1] . The main attention is paid to nuclei 252No and 254No, where we have most of the experimental...

8. Many-body effects of hyperonic interactions in neutron stars

Mr Semyon Mikheev (SINP MSU)

Medium effects, which can be introduced in the Skyrme formalism as density-dependent or three-body forces, are an essential part of describing hyperonic interactions. In neutron stars, these effects are especially important due to the extremely high densities.

We study the influence of the different aspects of these medium effects on neutron stars characteristics. In particular, the role...

18. Matrix kinetic equation approach to calculation of neutrino emission accompanying formation of Cooper pairs in superfluid neutron star matter.

Peter Shternin (Ioffe Institute)

TBA

11. On the possibility of $\pi^0$ condensation and magnetization in freely interpenetrating nuclei

Prof. Dmitry Voskresensky (BLTP, JINR Dubna)

Conditions are found, at which in the nuclear matter there may appear a spatially nonuniform $p$ wave $\pi^0$ condensate supplemented by a spatially varying spontaneous magnetization. The pion-nucleon interaction and the anomaly contributions to the magnetization are taken into account. Response of the system on the external magnetic field is also considered. Then the model of...

30. Percolation, polymers and square ice: exact formulas and finite size scaling

Alexander Povolotsky (BLTP,JINR)

Percolation models are widely recognized in statistical physics for providing the simplest example of a phase transition and critical phenomenon. Bonds of an infinite lattice chosen to be open at random with probability $p$ and closed otherwise form an infinite cluster when $p$ exceeds a critical value. The statistics of open clusters show typical critical behavior at the critical point, like...

39. Pion transition form-factor in the frameworks of the PNJL model and the quark model with separable interaction

Alexandra Friesen (Joint Institute for Nuclear Research)

The study of the pion photodecay plays an important role in particle physics. The practical interest is explained by the fact that the neutral pion decays electromagnetically in two photons with branching ratio 99%. And a great percentage of photons in the background of heavy ion collision (HIC) is a result of π0 and η decays. The decay width can be considered in terms of the transition form...

37. Possible phase transition in accelerated system

George Prokhorov (Dubna, BLTP)

Heavy ion collisions produce matter with extreme vorticity and acceleration, sparking strong theoretical and experimental interest. I will discuss theoretical results on the (acceleration-temperature) phase diagram for spin-1/2 particles, predicting a new phase transition below the Unruh temperature. This transition links to an effective black hole in an accelerated frame, namely, with the...

17. Recent Advances in the Physics of the Inner Crust

Dr Andrey Chugunov (Ioffe Institute)

TBA

35. Reconstruction of Neutron Stars Mass Distribution from Cooling Evolution

Hovik Grigorian (JINR)

The influence of environmental effects and proton superconductivity in the matter of neutron stars on the evolution of stellar cooling is studied. It is shown that using cooling models and observational data on the temperature and age of pulsars, it is possible to extract the masses of the observed objects and the mass spectrum of neutron stars.

44. Signature of strange star in SGR 0501+4516

Chitta Ranjan Das (BLTP, JINR)

A strange star is a hypothesized compact star that is dense enough to literally break down ordinary neutrons into their constituent quarks. Furthermore, the up and down quarks are squeezed into an even rarer sort of quark known as a strange quark, which explains the name strange star. Technically, up, down, and strange quarks make up the "strange" matter of a strange star. This mixture of...

24. Spectral functions of the $O(N)$ model from the functional renormalization group approach

Dr Nikita Lebedev (N.N. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research)

We will discuss the computation of spectral functions of bound states using the real-time formulation of a functional renormalization group (FRG) approach on the example of the O(4) model. The computation is based on the Kallen-Lehmann spectral representation of dressed propagators used in the Wetterich equation -- the flow equation of the effective action. We consider an approximation of...

27. Spin polarization in heavy ion collisions and relativistic spin-hydrodynamics

Amaresh Jaiswal (NISER Bhubaneswar, Jatni)

I present an overview of recent developments in the measurements of spin-polarization in heavy ion collisions and the formulation of spin-hydrodynamics.

20. Structure of QCD string near Casimir Surface

Konstantin Pak (Pacific Quantum Center, Institute of Automation and Control Processes)

The confinement problem still remains an important topic in quantum chromodynamics (QCD). At the moment, there is no acceptable way to describe the low-energy limit of QCD, at which non-pertubative effects appear, except for lattice modeling. In my work, using lattice QCD methods, I considered flux tubes connecting a quark - antiquark pair, with additional boundary conditions in the form of a...

4. Study of the properties of rotating quark-gluon matter by means of lattice QCD simulations на решетке

Prof. Victor Braguta (JINR)

The paper will present the results of the study of the influence of relativistic rotation on the properties of quark-gluon matter. To carry out this study, we switch to a reference frame that rotates together with the system we study. In this reference frame, the rotation leads to the appearance of an external gravitational field, and the problem is reduced to the study of the properties of...

25. Systematic study of anisotropic flow in relativistic heavy-ion collisions

Arkady Taranenko (VBLHEP JINR)

Measurements of the anisotropic collective flow of particles produced in relativistic heavy
ion collisions play an important role in the study of the transport properties of strongly interacting matter.
In this work we present the results of the most complete systematic study of the dependence of the anisotropic
collective flow on the collision energy from 2.4 GeV to 5.76 TeV based on the...

12. Thermal enhancement of nuclear (anti)neutrino emission during pre-supernova stage

Alan Dzhioev (Joint Institute for Nuclear Research, Bogoliubov Laboratory of Theoretical Physics)

Accurate estimates of (anti)neutrino spectra and luminosities are essential for assessing the possibility of detecting neutrinos from pre-supernova stars. Using the thermal quasiparticle random-phase approximation (TQRPA) method, we studied the effects of nuclear temperature on pre-supernova (anti)neutrino emission. Comparing the $\nu_e$ and $\bar\nu_e$ spectra produced in neutral- and...

10. Transport properties of rotating quark matter

Jayanta Dey (BLTP, JINR)

Measurements of global spin polarization of hyperons and mesons in non-central heavy ion collisions reveal a promising signature of non-zero net angular momentum in the locally thermalized medium of quark-gluon plasma. This motivates a detailed understanding of the thermodynamic and transport properties of quark matter in a rotating frame. Rotation breaks translational symmetry in a system and...

45. Universalities in neutron star equations of state

Dmitry Ofengeim (Hebrew University of Jerusalem & Ioffe Institute)

There are plenty of models for the neutron star (NS) equation of state (EoS) on the astrophysical market. While they are very diverse (nucleonic, hyperonic, or hybrid, based on different microphysics), it is widely known that some macroscopic NS properties show universal correlations which are largely independent of a specific EoS model. Such universalities have several astrophysical...

33. van der Waals droplets balancing between liquid and vapor

Vladimir Kondratyev (BLTP JINR)

Dynamics of heated droplets of particles interacting with Lennard-Jones potential are simulated by employing the classical molecular dynamics (CMD). Such large aggregates represent an example a finite system exhibiting the van der Waals equation of state in thermodynamic limit which properly characterizes the existence of spinodal region relevant for liquid-gas phase transition. We analyze an...

43. Vorticity in Heavy-Ion Collisions

Eduard Dlin

One of the most common quantities discussed in connection with Quark-Gluon Plasma is vorticity: $\vec{w}=curl\,\vec{v}$, where $\vec{v}$ is velocity. However, as the coordinates are not observed in a real experiment, we will also investigate such observable: $\vec{w}_p=(p_yv_z-p_zv_y, p_zv_x-p_xv_z,p_xv_y-p_yv_x)$, which can be interpreted as handedness and to which we refer as...

19. Weakening of the deconfinement phase transition in an external gravitational field

Daniil Stepanov (Pacific Quantum Center, Far Eastern Federal University; Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science)

We have investigated the accelarating hot gluonic matter near the critical temperature of the deconfinement phase transition within the framework of lattice quantum field theory (QFT). We used the Tolman-Ehrenfest relation between the temperature gradient and the gravitational field to introduce acceleration into the lattice QFT formalism. We considered several lattice sizes along imaginary...