The abstract: Considering the off-diagonal interaction in high energy nuclear collisions, rare particles are significantly enhanced in heavy ion collisions. I will consider the \Omega_ccc and true muonium production in heavy ion collisions at RHIC and LHC energies in this talk.
The study of strangeness baryon production in relativistic heavy-ion collisions provides unique insights into the properties of strongly interacting matter at extreme temperature and density. Strangeness enhancement was among the earliest proposed signatures of the formation of the quark-gluon plasma (QGP), and over the past decades, systematic measurements from SPS, RHIC, and LHC experiments...
The effect of $\Sigma^*(1385)$ baryon resonance on the time evolution of the $\Lambda$ hyperon polarization in hadronic matter is studied using a kinetic approach. This approach explicitly includes the production of the $\Sigma^*$ resonance from the $\Lambda-\pi$ and $\Sigma(1192)-\pi$ scatterings as well as its decay into $\Lambda+\pi$ or $\Sigma+\pi$. The resulting coupled kinetic...
We discuss the problem of hydrodynamics in small systems, and argue that to understand it a radical reassessment of the role of statistical fluctuations and the concept of equilibrium is necessary.
We should that defining hydrodynamics at the level of a partition function in every cell, and imposing general covariance, could result in an effective theory of fluctuating hydrodynamics,...
This talk will cover selected topics in color superconductivity in high-density QCD, with a particular focus on our work:
– Quark–hadron continuity and the potential existence of the high-density critical point
– Finite-temperature color superconducting phase transitions
– Quantum Hall liquids as vector mesons in the two-flavor color superconducting phase
We explore the interplay between Berry curvature and topological properties in single-flavor color superconductors, where quarks form spin-one Cooper pairs. By deriving a new relation, we connect the topological nodal structure of the gap function in momentum space to the (non-Abelian) Berry flux associated with paired quarks. This generalizes the early work by Li and Haldane [1] to systems...
The newly launched “QCD at FAIR” network targets to address open questions in the field of non-perturbative QCD leveraging high-intensity (anti)proton, deuteron and secondary pion beams at GSI/FAIR aligned with state-of-the-art theoretical advances. The program includes precision studies of hadron–hadron interactions, baryon spectroscopy, transition form factors, and in-medium modifications...
In this talk, the physics opportunities offered by the CBM detector will be presented.
At present, there is no clear consensus regarding how the mass and width of
the phi meson are modified in a dense environment such as nuclear matter,
nor on the strength of its chiral mixing with the axial-vector chiral
partner. Although a number of theoretical studies have addressed these
questions, establishing a direct connection with experimental observables
remains a significant...
The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex currently under commissioning at JINR, designed for collisions of heavy ions and polarized particles. The Multi-Purpose Detector (MPD) experiment at NICA aims to explore the rich phase structure of QCD at finite temperature and baryon chemical potential. Optimized to fully exploit NICA’s physics potential, MPD will...
J-PARC E16 and E88 experiments aim to study the in-medium modification of $\phi$ mesons in $e^+e^-$ and $K^+K^-$ decays in proton-nucleus collisions to study the effect of the chiral-symmetry restoration. In the past KEK-E325 experiment, the mass reduction of ϕ was observed at low velocity in p+Cu collisions in the $e^+e^-$ decay. E16 will measure several thousand $\phi \rightarrow e^+e^-$...
Understanding matter at high densities is one of the central goals of modern nuclear physics. Heavy-ion collisions at intermediate energies, $\sqrt{s_{NN}} = {\mathcal O}(2\;$–$\;10\;{\rm GeV})$, are the only terrestrial means to explore such extreme conditions. Several experimental programs plan to investigate this energy regime, including FAIR, NICA, HIAF, and J-PARC-HI. Before conducting...
The new accelerator complex: Highly Intensity Accelerator Facility (HIAF) has been under construction since 2018 at Huizhou, China and its commissioning has been scheduled at the end of 2025. In the range of few GeV per nucleon, the HIAF will accelerate protons and ions, up to uranium, with intensities of $10^{12}$ and $10^{10}$ ppp, respectively. In this talk, after brief introductions of...
The High-Intensity heavy-ion Accelerator Facility (HIAF) in Huizhou, China, is poised to become a world-class platform for nuclear physics research. Two key experimental programs are being developed to leverage its unique capabilities: the Hyperon-Nucleon Spectrometer (H-NS) fixed-target experiment will study hyperon polarization in pp collisions and global polarization in AA reactions,...
Recently we argued that baryons feel the quark substructure constraints at density around a few times the nuclear saturation density. If confinement is assumed to persist, the constraints push up the baryon momenta and make those baryons relativistic. In this talk I discuss how to derive these behaviors in a field theoretic approach, employing the phase shift representation of the...
Quark-antiquark pairs close in phase space that recombine to form a quarkonia state, also known as coalescence, are often discussed in terms of quark-gluon plasma effects on charmonia production in heavy-ion collisions. Recent LHC measurements of the charm baryon-to-meson ratios in high multiplicity p-p collisions, however, suggest coalescence as a potential hadronization mechanism. A...
The behavior of scale symmetry in dense and thermal systems is an interesting topic in nuclear physics as it relates to the stiffness of equation of state. In this talk, I will discuss the nuclear matter properties by using an effective field theory with respect to the trace anomaly of QCD. Such as the pseudoconformal structure, the behavior of sound velocity, the expectation value of the...
Two-color ($N_c=2$) QCD world is one of the useful testing grounds to delineate cold and dense QCD matter, since the lattice QCD simulation is straightforwardly applicable thanks to the disappearance of the sign problem. Motivated by recent numerical experiments from the lattice QCD activities, I am being investigating properties of dense two-color QCD by constructing the linear sigma model...
We investigate the thermodynamic properties of baryonic excitations in heavy-quark QCD. Based on a lattice QCD with $N_{\rm f}$-flavor Wilson fermions, we derive an expression for the grand potential in terms of loop operators with the hopping parameter expansion (HPE) and the cumulant expansion. Using this grand potential, we analytically compute the baryon number susceptibilities and...
QCD matter in a strong magnetic field exhibits a rich phase structure. In the presence of an external magnetic field, the chiral Lagrangian for two flavors is accompanied by the Wess-Zumino-Witten (WZW) term containing an anomalous coupling of the neutral pion $\pi^0$ to the magnetic field via the chiral anomaly. Due to this term, the ground state is inhomogeneous in the form of either a...
It was shown recently that vorticity manifesting from space-time torsion can be treated as an effective axial gauge field coupled to massless Dirac fermions in a flat spacetime. Starting from a linear sigma model, I will outline our (re)-derivation of the WZW terms in the presence of external vector, axial-vector, and pseudo-scalar fields using a derivative expansion of fermion determinants....
