In this talk, we will present the inclusive J/ฯ production in proton-proton collisions at \sqrt{s}= 5.02, 7 and 13 TeV. A quantitative analysis of the relative contributions for different production mechanisms (NRQCD, cluster collapse, and non-prompt) in the inclusive J/ฯ production, as well as the energy and rapidity dependence of these contributions will be shown. We will also discusse the...
We use Bayesian inference with deep-learning surrogate models to quantitatively extract the in-medium heavy quark (HQ) potential from bottomonium nuclear modification factors ($R_{AA}$) measured in Pb--Pb collisions at $\sqrt{s_{NN}}=5.02$ and $2.76$ TeV and Au--Au collisions at $\sqrt{s_{NN}}=200$ GeV. The real and imaginary parts of the potential are parametrized and embedded in a...
Energy-energy correlator (EEC) is an excellent jet substructure observable owning to its strong sensitivity to jet physics at different scales. Using a hybrid Pythia 8 + LBT framework, we perform a complete realistic simulation on medium modification of heavy and light flavor jet EEC in heavy-ion collisions. A clear flavor hierarchy is observed for jet EEC in both vacuum and QGP due to the...
Heavy quark (HQ) momentum ($\kappa$) and spatial di๏ฌusion ($D_s$) coe๏ฌcients are computed in a non-perturbative thermal QCD medium in the presence of a background magnetic ๏ฌeld of arbitrary strength. Both perturbative (Yukawa) and non-perturbative (string) e๏ฌects are incorporated via the in-medium HQ potential, obtained from the resummed
gluon propagator ($D_{\mu\nu}$). To that end, an ansatz...
Recent work has proposed sequential hadronization of open-charm hadrons in the quark-gluon plasma, wherein more tightly bound species such as Ds+ form earlier near 1.2Tc and D0 forms later at Tc. That work showed that this mechanism naturally reverses the sign of the D0 โ Ds+ elliptic-flow splitting โv2 โก v2(D0) โ v2(Ds+) relative to the conventional simultaneous baseline. In this work, we...
In ultra-peripheral collisions (UPCs), coherent J/$\psi$ photoproduction provides a sensitive probe of the nuclear gluon distributions. The STAR collaboration has reported differential measurements of photoproduced J/$\psi$ in Au+Au UPCs, providing important constraints on nuclear gluon structure and sub-nucleonic fluctuations in heavy nuclei. Compared with Au+Au collisions, isobaric systems...
Production of $\psi(4040)$, $\psi(4160)$ and $\psi(4415)$ mesons in
ultrarelativistic heavy-ion collisions
Xiao-Ming Xu
Department of Physics, Shanghai University, Baoshan, Shanghai 200444, China
$\psi(4040)$, $\psi(4160)$ and $\psi(4415)$ mesons are higher charmonia that
can be individually interpreted as the $3 ^3S_1$, $2 ^3D_1$ and $4 ^3S_1$
quark-antiquark states. In...
In the present talk, I will review recent progress on (Anti-)(Hyper-)Nuclei production, structure, and polarization in High-Energy Nuclear Collisions
In heavy-ion collisions, heavy quarks serve as sensitive probes of the quarkโgluon plasma (QGP), as they traverse and interact with the constituents of the medium throughout its entire evolution. In protonโproton (pp) collisions, the study of their production offers stringent tests of perturbative quantum chromodynamics (pQCD) calculations and serves as an essential baseline for the...
Bottomonium bound states serve as invaluable probes of the quark-gluon plasma (QGP) in relativistic heavy-ion collisions, owing to their negligible thermal production and non-relativistic nature that allows a theoretical description via potential non-relativistic QCD (pNRQCD). However, recent lattice QCD calculations of the in-medium bottomonium potential have yielded qualitatively distinct...
The $N\Omega$ system is a promising candidate for a dibaryon bound state. To enable a direct comparison between lattice QCD and experiment, we calculate the $^5S_2$ $N\Omega$ interaction in $(2+1)$-flavor lattice QCD at the physical point ($m_\pi\simeq137.1$ MeV and $m_K\simeq501.8$ MeV) with the time-dependent HAL QCD method. Because the coupling to the $D$-wave octet-octet channels is weak,...
For the high-energy terminal of High Intensity heavy-ion Accelerator Facility (HIAF), we have proposed an experimental project using Huizhou Hadron Spectrometer (HHaS) [1]. It covers a wide range of physics subjects, containing the studies of light hadrons, hypernuclei, and the nuclear matter phase diagram, as well as the search for the phenomena beyond the standard model. The concept of HHaS...
Heavy-ion collisions (HICs) is a unique tool for studying properties of hot and condensed nuclear matter. HICs at HIRFL-CSR energies can create nuclear matter with baryon density as high as 2 to 3 times of the saturation density. The CSR External-target Experiment (CEE) at HIRFL facility is a larger acceptance spectrometer to study QCD phase structure, Equation of State (EoS) and sub-threshold...
Hypernuclei are nuclear bound states composed of nucleons and one or more hyperons. Precise measurements of hypernuclei properties and production yields in heavy-ion collisions provide important insights into the hyperonโnucleon interaction and hypernuclear production mechanisms. The second phase of the Beam Energy Scan program at RHIC (BES-II) provides a unique opportunity to investigate the...
Isospin symmetry, one of the fundamental symmetries underlying the strong interaction, predicts similar production rates of charged and neutral kaons in high-energy collisions. However, recent measurements by the NA61/SHINE Collaboration indicate an excess production of charged over neutral kaons, suggesting significant isospin symmetry breaking that challenges the expectation, and the...
The study of multi-baryon interactions, particularly those involving strange quarks, is key to understanding dense nuclear matter and the equation of state of neutron stars. While two-body nucleon-nucleon ($N$-$N$) and hyperon-nucleon ($Y$-$N$) forces are relatively well constrained, genuine three-body interactions remain largely unexplored. By comparing systems composed solely of nucleons...
Spin correlations are among the fundamental quantum observables in many-body systems, yet direct measurements of two-particle spin correlations in relativistic heavy-ion collisions remain challenging. Existing spin studies have mainly focused on single-particle phenomena, such as hyperon polarization and vector-meson spin alignment, while genuine two-particle spin correlations in the produced...
We have used the parton and hadron cascade model PACIAE together with the Dynamically Constrained Phase-space Coalescence model (DCPC) to study the $T_{cs0}^{*}(2870)^{0}$ production in $pp$ collision at $\sqrt{s}$ = 7 TeV, following the LHCb observation of $T_{cs0}^{*}(2870)^{0}$ in the $B^{-}\to D^{-}D^{0}K^{0}_{S}$ decays in $pp$ collisions at $\sqrt{s}$ = 7, 8, and 13 TeV [PRL...
Hypernuclei, which are special nuclei formed by nucleon cores and hyperons, are ideal platforms to study the hyperon-nucleon interactions. The $\Lambda$-binding energies ($B_{\Lambda}$) of hypernuclei are direct observables encoding the ฮN and ฮNN interactions, which are relevant to understanding the ``hyperon puzzle'' in neutron stars. However, the measurements on the $B_{\Lambda}$ of light...
The Electron-Ion Collider (EIC), which is scheduled to begin operations at Brookhaven National Laboratory in the 2030s, will explore the quark and gluon structure of nucleons and nuclei, including the emergence of gluon saturation at high densities. Through high-energy collisions of polarized electrons with protons and nuclei, the EIC will provide new insights into the structure and dynamics...
Nuclear clustering and intrinsic deformation are important manifestations of many-body correlations in nuclei. At RHIC and the LHC, collective flow and transverse-momentum correlations have been extensively explored as probes of initial-state nuclear structure [1]. Building on recent studies of $\alpha$ clustering and U+U deformation at CSR energies [2,3], we investigate whether...
ALICE 3 is the next-generation detector system proposed for LHC Runs 5 and 6. Its main tracking system is based on CMOS Monolithic Active Pixel Sensor (MAPS) technology, providing broad pseudorapidity coverage and consisting of an Inner Tracker (IT) and an Outer Tracker (OT). This talk focuses on the ongoing efforts on the OT project by the Korea ALICE group (KoALICE).
The OT is composed of...
The Multi-Purpose Detector (MPD) is a flagship experiment at the Nuclotron-based Ion Collider fAcility (NICA) at the Joint Institute for Nuclear Research (JINR). It is designed to investigate strongly interacting matter at high net-baryon densities through systematic measurements of heavy-ion collisions at center-of-mass energies of $\sqrt{s_{\mathrm{NN}}} = 4-11~\mathrm{GeV}$ in collider...
During the LHC Long Shutdown 3 (2026โ2030), the ALICE collaboration will upgrade its three innermost tracking layers with the Inner Tracking System 3 (ITS3), the first fully cylindrical, wafer-scale silicon vertex detector. Built on 65 nm CMOS MAPS technology, ITS3 features silicon thinned to 50 ยตm and bent into self-supporting cylindrical layers at radii of 19, 25, and 32 mm. Wafer-scale...
The Cooler-Storage-Ring External-target Experiment (CEE) is a spectrometer to study the properties of nuclear matter at high baryon density region. The CEE time projection chamber (TPC), which uses the state-of-the-art SAMPA electronics read-out chips is the key sub-detector of CEE. This talk presents the track-finding algorithm that is used for event reconstruction for the TPC detector at the...
The ALICE experiment at the Large Hadron Collider (LHC) currently uses the Inner Tracking System 2 (ITS2) for tracking during LHC Run 3. ITS2 is based on Monolithic Active Pixel Sensor (MAPS) technology, known as ALPIDE (ALICE Pixel Detector). During Long Shutdown 3 (LS3), scheduled for 2026โ2030, the innermost three layers of ITS2 will be replaced by ITS3. The ITS3 upgrade relies on...
Author
Kanato Matsutani$^{1,2}$ for the ePIC Japan Group
$^1$Graduate School of Advanced Science and Engineering, Hiroshima University, Japan
$^2$WPI-SKCM2, Hiroshima University, Japan
Abstract
The Electron-Ion Collider (EIC) at Brookhaven National Laboratory will collide polarized electrons with protons and nuclei to explore the partonic structure of matter. Hadron identification in...
A FAZIA (Forward-angle A and Z Identification Array) telescope consists of two silicon pad detectors and a CsI(Tl) scintillator. Using the ฮEโE correlation and pulse shape analysis (PSA), the FAZIA detector can identify charges up to Z = 52 and discriminate isotopes up to Z = 25.
Presently, the FAZIA upgrade project is ongoing with the goal of extending the beam-energy coverage and lowering...
