19th International Conference on QCD in Extreme Conditions (XQCD 2023)

Session

Plenary session

26 Jul 2023, 11:00

Auditorium C.1 (Department of Physics (University of Coimbra))

38. Building a realistic neutron star from holography

Andreas Schmitt (University of Southampton)

26/07/2023, 11:00

Talk

I will present latest results within the holographic Witten-Sakai-Sugimoto model for dense matter at nonzero baryon and isospin chemical potentials. In particular, I will discuss the phase structure including phases where baryonic matter and meson condensates coexist. As an application I will show that the results can be used to construct entire neutron stars, including the inhomogeneous...

11. Topology and robustness of a quark matter phase candidate for magnetars core

Vivian Incera (University of Texas Rio Grande Valley)

26/07/2023, 11:25

Talk

One central question in nuclear astrophysics nowadays is determining the matter structure of neutron stars (NS). With the wealth of newly available and upcoming astrophysical observations, it is of most relevance to find ways to compare the characteristics of potential NS matter phase candidates with those gathered from NS observations. As part of these efforts, I will discuss how some unique...

61. The critical endpoint at large N_c

Dr Péter Kovács (Wigner Research Centre for Physics)

26/07/2023, 11:50

Talk

The phase diagram of QCD is investigated by varying number of colors N_c within a Polyakov loop quark-meson chiral model. In particular, our attention is focused on the critical point(s); the critical point present for N_c=3 moves toward the mu_q-axis and disappears as soon as the number of color is increased. Yet, a distinct critical point emerges along the temperature axis for N_c=53 and...

76. Magnetic enhancement of baryon confinement modeled via a deformed Skyrmion

Prof. Kenji Fukushima (The University of Tokyo)

27/07/2023, 10:30

Talk

The gigantic magnetic field, $B$, is expected in the heavy-ion collision and in the neutron star cores. The phase structure under $B$ has been well investigated, but the hadron properties are not fully understood. Recently, the lattice QCD found that even neutral meson masses are significantly affected by the $B$ effects. Then, what about baryons?

In this talk, I would like to emphasize...

60. Hydrodynamics of fluctuations and maximum entropy freeze-out

Misha Stephanov (UIC)

27/07/2023, 10:55

Talk

Fluctuations play crucial role in determining properties of the QCD equation of state and transport in heavy-ion collision experiments. Recent progress in understanding evolution of fluctuations in relativistic hydrodynamics aims at providing predictive description of the fluctuations, including their non-gaussianity. The problem of connecting the predictions of hydrodynamics with experimental...

32. Jet quenching in glasma

Stanislaw Mrowczynski (National Centre for Nuclear Research, Warsaw, Poland)

27/07/2023, 11:20

Talk

We discuss the transverse momentum broadening of hard probes traversing an evolving glasma, which is the earliest phase of the matter produced in relativistic heavy-ion collisions. The coefficient $\hat q$ is calculated using the Fokker-Planck equation, and an expansion in the proper time $\tau$ which is applied to describe the temporal evolution of the glasma. The correlators of the...

34. Helicity conservation in relativistic perfect fluids

Cristina Manuel (Instituto de Ciencias del Espacio (CSIC-IEEC))

27/07/2023, 11:45

Talk

We show that in isentropic relativistic fluids the total helicity of a perfect electromagnetic fluid is conserved. The helicity conservation law can be reshaped in the form of a chiral anomaly equation.
For systems made up by massless fermions, we study how the helicity conservation law is modified in the presence of a chiral misbalance, when one has also to consider the effects of the chiral...

107. Quarks in a finite volume and deconfinement as percolation of center-electric fluxes in QCD

Prof. Lorenz von Smekal (Justus-Liebig University Giessen)

28/07/2023, 10:15

Talk

In order to understand the puzzle of the free energy of an individual quark in QCD, we explicitly construct ensembles with quark numbers 𝑁𝑉≠0mod3, corresponding to non-zero triality in a finite subvolume 𝑉 on the lattice. We first illustrate the basic idea in an effective Polyakov-loop theory for the heavy-dense limit of QCD, and then extend the construction to full Lattice QCD, where the...

14. Topological structure of the QCD vacuum at finite temperature

Dr Waseem Kamleh (University of Adelaide)

28/07/2023, 10:40

Talk

The structure of the gluonic vacuum is examined at finite temperature in lattice QCD. The topological charge density on individual Monte Carlo gauge field configurations is calculated, and an algorithm is applied to detect topological objects associated with local extrema. These objects are found to have a distribution of fractional topological charge, and the nature of this distribution...

8. Anomalous Electromagnetism in QCD at intermediate baryonic densities

Efrain J Ferrer (The University of Texas at Rio Grande Valley)

28/07/2023, 11:05

Talk

In this talk, the anomalous transport properties of the spatially inhomogeneous phase of dense quark matter known as the Magnetic Dual Chiral Density Wave (MDCDW) phase will be reviewed. I will discuss several anomalous electromagnetic effects that can take place in this phase at low temperatures and intermediate baryonic densities. I will present the axion electrodynamics characterizing this...

84. Inhomogeneous meson condensation

Massimo Mannarelli

28/07/2023, 11:30

Talk

The meson condensed phase is an interesting portal on the properties of QCD in a regime in which various methods, including lattice QCD, are reliable.
We discuss inhomogeneous topologically nontrivial configurations of the pion fields
in the framework of chiral perturbation theory.
Solitons characterized by a nonvanishing topological charge naturally emerge. These states that can be...