Conveners
NuSym Scientific Session: Session 1
- Tadaaki Isobe (RIKEN)
NuSym Scientific Session: Session 2
- Mizuki Kurata-Nishimrua (RIKEN)
NuSym Scientific Session: Session 3
- Kenichi Yoshida (The University of Osaka)
NuSym Scientific Session: Session 4
- Zhigang Xiaozg (Department of Physics, Tsinghua University)
NuSym Scientific Session: Session 5
- Juzo ZENIHIRO (Department of Physics, Kyoto University)
NuSym Scientific Session: Session 6
- Akira Ono (Tohoku University)
NuSym Scientific Session: Session 7
- Jรฉrรดme Margueron (International Research Laboratory on nuclear physics and nuclear astrophysics)
NuSym Scientific Session: Session 8
- Natsumi Ikeno
NuSym Scientific Session: Session 9
- Hermann Wolter (University of Munich (LMU))
NuSym Scientific Session: Session 10
- Pawel Danielewicz (Facility for Rare Isotope Beams, Michigan State University)
NuSym Scientific Session: Session 11
- Bao-An Li (East Texas A&M University)
NuSym Scientific Session: Session 12
- Jerzy Lukasik (Institute of Nuclear Physics IFJ-PAN)
NuSym Scientific Session: Session 13
- Arnaud Le Fรจvre (GSI Darmstadt)
NuSym Scientific Session: Session 14
- Byungsik Hong (Korea University)
NuSym Scientific Session: Session 15
- Sherry Yennello (Texas A&M University)
NuSym Scientific Session: Session 16
- Abdou Chbihi (GANIL)
NuSym Scientific Session: Session 17
- Betty Tsang (Michigan State University)
-
Tadaaki Isobe (RIKEN)08/09/2025, 09:20
-
Lie-Wen Chen (Shanghai Jiao Tong University, Shanghai, China)08/09/2025, 09:301. Nuclear structure and reactions
In this talk, I will give an overview of theoretical study for nuclear EOS, especially for the symmetry energy, mainly including recent progresses from nuclear structures (nuclear ground state masses, nuclear giant resonances, and nuclear neutron skin), heavy-ion collisions (particle production and flows based on the advanced transport models) and neutron star observations (mass, radius, tidal...
Go to contribution page -
Dr Abdou Chbihi (GANIL)08/09/2025, 10:102. Heavy-ion collision experiments and transport model simulations
This presentation provides an overview of recentย experimental effortsย to constrain the nuclear equation of state (EoS), with a particular focus on theย density dependence of the symmetry energy. A broad range of measurements, spanning beam energies from a few MeV/nucleon to a GeV/nucleon, will be discussed. These experiments probe different density regimes, from sub-saturation to...
Go to contribution page -
Bao-An Li (East Texas A&M University)08/09/2025, 11:208. Theory of compact stars, including neutron star mergers and supernovae
Understanding the nature of dense neutron-rich matter and determining its Equation of State (EOS) remain fundamental goals in both nuclear physics and astrophysics. Among the components of the EOS in neutron-rich matter, the nuclear symmetry energyโwhich quantifies the energy cost of converting protons into neutrons in nuclear matterโremains the most uncertain. This symmetry energy plays a...
Go to contribution page -
Jรฉrรดme Margueron (International Research Laboratory on nuclear physics and nuclear astrophysics)08/09/2025, 12:003. Microscopic calculations of neutron-rich dense nuclear matter
Neutron stars are laboratories for the properties of
Go to contribution page
supra-dense matter and large isospin asymmetries, requiring expertise
from nuclear physics, particle physics, and astrophysics. Terrestrial
experiments are complementary since they probe the properties of
supra-dense matter close to nuclear saturation density (the average
density of atomic nuclei), or above but remaining close to... -
Dr Marc Salinas (Lawrence Livermore National Laboratory)08/09/2025, 14:004. Isospin and spin dependence of nuclear interactions and correlations
The CREX-PREX dilemma involving the weak form factors of calcium-48 and lead-208 challenges models that tie neutron skins to the symmetry energy. We explore a resolution by artificially enhancing the isovector spin-orbit interaction in relativistic mean-field models. This adjustment brings theoretical predictions into agreement with experiment by modifying the neutron distribution in calcium,...
Go to contribution page -
zhen zhang08/09/2025, 14:301. Nuclear structure and reactions
Model dependence is a common issue in nuclear physics, especially when extracting physical information from data using theoretical models. In recent years, the quantification of inter-model uncertainties has received increasing attention. In this talk, I will introduce methods for model averaging and model selection within both Bayesian and frequentist frameworks, and demonstrate their...
Go to contribution page -
Toi Tachibana (Department of Physics, Kyoto University)08/09/2025, 15:001. Nuclear structure and reactions
We calculated the equation of state (EOS) of spin-polarized nuclear matter in the relativistic Hartree-Fock method. To this end, we employed the relativistic point-coupling model, with which the Fock terms are considerably simplified, reducing them to the same form as the Hartree terms. In analogy to the slope parameter $L$ of the isospin-symmetry energy for spin-unpolarized matter, we...
Go to contribution page -
Pawel Danielewicz (Facility for Rare Isotope Beams, Michigan State University)08/09/2025, 15:502. Heavy-ion collision experiments and transport model simulations
Practical treatments of light cluster correlations in heavy-ion collision simulations and the clusters' potential in learning about bulk nuclear properties are reviewed. The difficulty in describing clusters in semiclassical approaches stems from the discrete nature of the clusters' spectra. The opportunity that the clusters represent, to learn about bulk nuclear properties, stems from a...
Go to contribution page -
Nobuo HINOHARA (Center for Computational Sciences, University of Tsukuba)08/09/2025, 16:205. Clustering in isospin-asymmetric nuclear systems
Alpha clustering, which is prominently observed in light nuclei, also plays a significant role in the surface region of heavy nuclei. Recent studies have emphasized the correlation between alpha formation at the nuclear surface and the cross sections of alpha knockout reactions in Sn isotopes [1].
Go to contribution page
We previously proposed a method to evaluate the local alpha-removal strength using mean-field... -
Hiroyuki Tajima (The University of Tokyo)08/09/2025, 16:403. Microscopic calculations of neutron-rich dense nuclear matter
The notion of polarons has been developed to describe in-medium impurity states and interaction effects in the context of condensed-matter physics. Recently it has also been realized in ultracold atoms, which can be regarded as an ideal platform for investigating many-body physics in nuclear matter. In this contribution, we discuss how the polaron properties established in condensed-matter...
Go to contribution page -
Ang Li (Xiamen University)09/09/2025, 09:207. Astrophysical multi-messenger observations and nucleosynthesis
-
Prof. Luca Baiotti (The University of Osaka)09/09/2025, 09:508. Theory of compact stars, including neutron star mergers and supernovae
After an overview of the current status of astrophysical observations and numerical simulations of binary neutron star mergers, I will present our ideas on how to possibly discriminate equations of state (EOSs) with a quark-hadron crossover with respect to EOSs with purely hadronic matter or with a first-order quark-hadron transition through gravitational waves emitted in binary neutron star mergers.
Go to contribution page -
Chang Ho Hyun (Daegu University)09/09/2025, 10:208. Theory of compact stars, including neutron star mergers and supernovae
In this talk, we discuss how the existing and future detection of the
Go to contribution page
gravitational waves from compact stars can help reduce the uncertainties
in the density dependence of the symmetry energy. -
Stefano Burrello (Laboratori Nazionali del Sud (INFN))09/09/2025, 11:105. Clustering in isospin-asymmetric nuclear systems
Understanding many-body correlations in sub-saturated nuclear matter is essential for constructing a reliable equation of state (EOS), with wide-ranging implications in both nuclear and astrophysical contexts. At low densities, bound states of nucleons naturally emerge as a result of these correlations and are often treated phenomenologically within energy density functional (EDF) frameworks...
Go to contribution page -
Zhigang Xiaozg (Department of Physics, Tsinghua University)09/09/2025, 11:402. Heavy-ion collision experiments and transport model simulations
Short range correlation (SRC) in nuclei refers to the nucleons forming temporally correlated pairs in close proximity, giving rise to the high momentum of the nucleons beyond Fermi surface. It has been reported that Bremsstrahlung gamma production from np process in heavy ion reactions provides a novel probe to the existence of SRC in nuclei. In this talk, I will present the first quantitative...
Go to contribution page -
Jun Xu (Tongji University)09/09/2025, 12:102. Heavy-ion collision experiments and transport model simulations
While the spin polarization of hyperons and the spin alignment of vector mesons become a hot topic in relativistic heavy-ion collisions, the spin dynamics in intermediate-energy heavy-ion collisions has attracted little attention. Starting from the spin-dependent Boltzmann-Vlasov equation, we have derived the spin-dependent equations of motion for nucleons, and developed a spin- and...
Go to contribution page -
Hui Tong (University of Bonn)09/09/2025, 14:006. Strangeness in nuclei and nuclear matter
The equation of state (EoS) of nuclear matter plays a decisive role to understand the neutron star properties and the gravitational waves from neutron star mergers. At sufficient densities, the appearance of hyperons generally softens the EoS, leading to a reduction in the maximum mass of neutron stars well below the observed values of about 2 solar masses. Even though repulsive three-body...
Go to contribution page -
Prof. Carlo Barbieri (Universitร degli Studi di Milano and INFN Milano)09/09/2025, 14:303. Microscopic calculations of neutron-rich dense nuclear matter
Self-consistent Green's function (SCGF) simulations have been capable to provide useful insight into the structure of homogeneous nucleonic matter, in part dure to their ease in handling hard potentials and at finite temperature and in part thanks to the possibility for direct access to physical information such as response and nucleon mean free-path. There exists two different implementations...
Go to contribution page -
Tsuyoshi Miyatsu (Soongsil University)09/09/2025, 15:003. Microscopic calculations of neutron-rich dense nuclear matter
Taking into account astrophysical observations of neutron stars, we present new effective interactions based on relativistic mean-field (RMF) models. In addition to the isovector-vector ($\vec{\rho}^{\,\mu}$) meson, the isovector-scalar ($\vec{\delta}$) meson and meson-mixing terms involving isoscalar and isovector mesons---specifically $\sigma^{2}\vec{\delta}^{2}$ and...
Go to contribution page -
Miki Fukutome09/09/2025, 15:501. Nuclear structure and reactions
The equation of state (EOS) of nuclear matter is essential not only for describing the structure and collisions of atomic nuclei but also for understanding various astrophysical phenomena such as the mechanism of supernova explosions and the structure of neutron stars. The EOS includes components that depend on the difference between proton and neutron densities, which are represented by the...
Go to contribution page -
Yuto Hijikata (RIKEN)09/09/2025, 16:101. Nuclear structure and reactions
Nuclear radius and density distribution are fundamental quantities that characterize the ground-state properties. Proton elastic scattering at intermediate energies is a powerful method for deducing matter distribution. To extend this technique to radioactive isotopes (RIs), we have developed various experimental tools, including particle identification detectors for the RI beams, a solid...
Go to contribution page -
Takehito Hayakawa (National Institutes for Quantum Science and Technology)09/09/2025, 16:307. Astrophysical multi-messenger observations and nucleosynthesis
Some rare isotopes such as 7Li, 11B, 138La, and 180Ta are considered to be synthesized by neutrino-induced reactions in core-collapse supernovae (neutrino process). The study of the neutrino-process has an important tole for understanding neutrino physics such as neutrino mass hierarchies and explosion mechanism. Here we report the calculated results using the neutrino process in SNe [1].11B...
Go to contribution page -
Arnaud Le Fรจvre (GSI Darmstadt)10/09/2025, 09:202. Heavy-ion collision experiments and transport model simulations
Our presentation will be 2 fold.
Go to contribution page
The first part will be a short status report of the second campaign of the ASY-EOS experiment held at GSI Darmstadt in March 2025, with the measurement of Au+Au collisions between 0.28 and 1 GeV/nucleon. This new experiment aims at constraining the symmetry energy of nuclear matter at larger densities (about 2.5 times saturation density) with higher accuracy... -
Yingxun Zhang (China Institute of Atomic Energy)10/09/2025, 09:502. Heavy-ion collision experiments and transport model simulations
In my talk, I will first mention our efforts on the improvements of the transport models after the TMEP, such as the consistency of the initialization, extended Skyrme momentum dependent interaction, a novel Pauli blocking algorithm, and so on. Then, I will discuss the recent effort on understanding the constraints of the neutron-proton effective mass splitting (ฮm_np^*) via HICs. We find a...
Go to contribution page -
Natsumi Ikeno10/09/2025, 10:202. Heavy-ion collision experiments and transport model simulations
To study the pion production in heavy-ion collisions, we developed the transport model~[1] which combines the nucleon dynamics obtained by the antisymmetrized molecular dynamics (AMD) model with a newly developed transport code which we call sJAM. In the previous work~[1], we treated the collision terms of the $NN \leftrightarrow N \Delta$ and $\Delta \leftrightarrow N \pi$ processes with the...
Go to contribution page -
Che-Ming Ko (Texa A&M University)10/09/2025, 11:106. Strangeness in nuclei and nuclear matter
The hypertriton was first discovered in 1952 by Marion Danysz and Jerzy Pniewski [1] using a balloon-flown emulsion plate exposed to high-energy cosmic rays and was later studied through the interaction of stopping negative kaons in a helium bubble chamber [2]. It is now known that the ฮ hyperon in a hypertriton has a separation energy of only about 130 keV and a spatial separation of roughly...
Go to contribution page -
Koji Miwa (Tohoku University)10/09/2025, 11:406. Strangeness in nuclei and nuclear matter
To study the structure of neutron stars, it is important to consider the hyperons that are expected to appear in the core to suppress the high Fermi energy of neutrons. In particular, since the observation of a neutron star having twice solar mass in 2010, there has been much discussion about how to compensate for the drop in the pressure of the star caused by the appearance of hyperons, and...
Go to contribution page -
Prof. Kohsuke Sumiyoshi (National Institute of Technology, Numazu College)11/09/2025, 09:208. Theory of compact stars, including neutron star mergers and supernovae
I will overview the influence of hot and dense matter in core-collapse supernovae and neutron stars concerning neutrino emission and nucleosynthesis. Supernovae, starting from the gravitational collapse of massive stars, provide bright displays, compact objects (neutron stars or black holes), supernova neutrinos, and heavy elements. The mechanism of supernova explosions has been a...
Go to contribution page -
Sebastien Guillot (IRAP / U. Toulouse)11/09/2025, 09:507. Astrophysical multi-messenger observations and nucleosynthesis
Since 2017, The Neutron Star Interior Composition Explorer (NICER) on the International Space Station has been in collecting observational data from millisecond pulsars. This old and stable neutron stars are ideal objects to constrain dense nuclear matter. Their hot ($10^6$ K) surface emission, located at the base of the magnetic field, emit X-rays that are seen as X-ray pulsations by the...
Go to contribution page -
Peter Pang (Nikhef / Utrech University)11/09/2025, 10:207. Astrophysical multi-messenger observations and nucleosynthesis
Bayesian frameworks that combine theory, nuclear experiments, and astrophysical observations, such as GW170817 and NICER, have successfully placed strong constraints on the neutron star equation of state (EOS). However, the computational demands, which require days to weeks, have limited progress. Recent breakthroughs in machine learning, differential programming, and GPU acceleration...
Go to contribution page -
Dr Jan Steinheimer-Froschauer (GSI)11/09/2025, 11:102. Heavy-ion collision experiments and transport model simulations
I will present a new way to combine constraints on the high density QCD equation of state, from connecting neutron star observations to data from heavy ion reactions at the HADES experiment. In this new setup, the Chiral Mean Field Model, which can describe neutron star and iso-spin symmetric matter, is used for the consistent calculation of the density and momentum dependent potentials of...
Go to contribution page -
William Lynch (FRIB and Michigan State University)11/09/2025, 11:402. Heavy-ion collision experiments and transport model simulations
Measurements of nucleus-nucleus collisions at the RIBF facility allows us to place constraints on the density dependence of the symmetry energy and on the pressure from the symmetry energy. When we combine these measurements with existing constraints on the symmetric matter EoS, we have obtained constraints on the Equation of State (EoS) of neutron-rich matter. These constraints are relevant...
Go to contribution page -
Yijie Wang (Department of Physics, Tsinghua University)11/09/2025, 12:102. Heavy-ion collision experiments and transport model simulations
Symmetry energy, closely tied to the isospin dimension of the equation of state for nuclear matter, connects the fundamental properties of microscopic atomic nuclei and macroscopic neutron stars. In terrestrial laboratories, heavy-ion collisions offer a unique way to investigate the characteristics of symmetry energy. After over a decade of dedicated research, a Compact Spectrometer for Heavy...
Go to contribution page -
23. The measurement and analysis of neutron-neutron correlation function in the heavy ion experimentDawei Si (Tsinghua University)11/09/2025, 14:002. Heavy-ion collision experiments and transport model simulations
The isospin-dependent equation of state of nuclear matter, i.e. symmetry energy plays an important role in the study of nuclear physics and astrophysics. The calculation of transport model has shown the symmetry energy affects significantly the nucleon emission times in HIC leading to significant variation of two-nucleon correlation functions.
Recent years, a compact spectrometer for...
Go to contribution page -
Yifei Niu (Lanzhou University)11/09/2025, 14:201. Nuclear structure and reactions
Nuclear giant resonances provide useful constraints on nuclear equation of state (EoS). For example, the isoscalar giant monopole resonance provides direct constraint on nuclear incompressibility and the isovector modes provide useful information on symmetry energy. In this talk, I will show you the unified description of giant monopole resonance in Sn and Pb isotopes is achieved by using the...
Go to contribution page -
Dr Bao-Jun Cai (Fudan University)11/09/2025, 14:508. Theory of compact stars, including neutron star mergers and supernovae
We present a model-independent framework to study neutron star (NS) cores by reformulating the TolmanโOppenheimerโVolkoff (TOV) equations into a dimensionless form using scaled pressure and energy density. This intrinsic and perturbative analysis (IPAD-TOV) enables direct extraction of core equation-of-state (EOS) information from NS observables such as mass, radius, and compactness, without...
Go to contribution page -
Nikolai Shchechilin (Universite Libre de Bruxelles)11/09/2025, 15:408. Theory of compact stars, including neutron star mergers and supernovae
The extreme conditions encountered in neutron stars (NS) require the extension of the quantum chromodynamics phase diagram from the temperature-density plane to the isospin dimension. The crucial parameter for the description of nuclear matter in these very neutron-rich environments appears to be the nuclear symmetry energy. The smallest proton fractions (down to โ 3 %) can be found deep in...
Go to contribution page -
Prof. Tsuneo NODA (Kurume Institute of Technology)11/09/2025, 16:008. Theory of compact stars, including neutron star mergers and supernovae
Neutron stars are high-density stellar objects that remain after a supernova explosion. Their central density exceeds the nuclear density, and various states are thought to appear in their interiors that do not appear in ordinary nuclei, such as superfluid states of neutrons and protons, quark deconfinement and hyperon mixing. These states have a strong influence on the neutrino emission...
Go to contribution page -
49. Measurement of the incompressibility in nuclei to reveal the equation of state of nuclear matterDr Shinsuke Ota (RCNP, Osaka University)11/09/2025, 16:201. Nuclear structure and reactions
The equation of state of nuclear matter plays essential roles not only in the nuclear structure and dynamics but also in the size and mass relation of neutron stars and in the dynamics of making and merging compact stars. Among various EoS parameters, the incompressibility (K) is particularly crucial as it directly reflects the sound velocity in nuclear matter and provides a robust constraint...
Go to contribution page -
Asanosuke Jinno (Kyoto University)12/09/2025, 09:206. Strangeness in nuclei and nuclear matter
The hyperon single-particle potential in nuclear matter is a key quantity in discussing whether hyperons can appear in neutron stars. We investigate the Lambda and Sigma potentials calculated by using baryon interactions based on chiral effective field theory (chiral EFT). The resulting Lambda potential is sufficiently repulsive to suppress the appearance of hyperons in neutron stars. To...
Go to contribution page -
Dan Cozma (IFIN-HH)12/09/2025, 09:502. Heavy-ion collision experiments and transport model simulations
A previous study of symmetry energy using pion production in heavy-ion collisions close to threshold is revisited [1,2]. Formerly neglected contributions, amounting to non-resonant pion production [3], have now been included in the dcQMD transport model. Their impact on total charged pion multiplicity and charged pion ratio is investigated in detail. Following the finding of relatively strong...
Go to contribution page -
Kyungil Kim (Institute for Rare Isotope Science, Institute for Basic Science)12/09/2025, 10:202. Heavy-ion collision experiments and transport model simulations
Collective flows from heavy-ion collisions have signals from the shapes of colliding nuclei. Most of nuclei are not spherical. The complex structures of atomic nuclei give various shapes: spherical, oblate, prolate shapes, and their co-existence. These shapes give different overlapped area of colliding heavy-ions. The emitting particles from the heavy-ion collision contain information of those...
Go to contribution page -
Zbigniew Chajecki (Western Michigan University)12/09/2025, 11:209. Future experiments and facilities
The equation of state (EoS) of nuclear matter, particularly its symmetry energy component, remains a central question in nuclear physics and astrophysics. While recent astrophysical observations have provided valuable constraints, experimental input from terrestrial laboratories is essential to disentangle model dependencies and explore the high-density regime. The Facility for Rare Isotope...
Go to contribution page -
Dr Yvonne Leifels (GSI Helmholtzzentrum fรผr Schwerionenforschung)12/09/2025, 11:509. Future experiments and facilities
The Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany is a next-generation accelerator facility designed to explore the properties of strongly interacting matter at extreme conditions of temperature, density, pressure, and isospin. One of its central goals is to constrain the nuclear matter equation of state (EOS) which is key to understanding the QCD phase diagram and...
Go to contribution page -
Jerzy Lukasik (Institute of Nuclear Physics IFJ PAN)12/09/2025, 12:209. Future experiments and facilities
The only way to study the properties of asymmetric nuclear matter at high densities in the laboratory conditions is to investigate the relativistic heavy ion collisions. A complementary source of information are the astrophysical observations and gravitational waves. The degree of compression and pressures achieved during the heavy ion collision depend on the susceptibility of the nuclear...
Go to contribution page -
Yapeng Zhang (Institute of modern physics, CAS)12/09/2025, 14:009. Future experiments and facilities
Heavy-ion collisions (HICs) serve as a unique experimental tool for investigating the properties of nuclear matter under extreme conditions in the laboratory. At HIRFL-CSR energies, HICs can produce nuclear matter at densities reaching 2โ3 times the normal nuclear saturation density. The HIRFL-CSR External-target Experiment (CEE) is a large-acceptance spectrometer specifically designed to...
Go to contribution page -
Tadaaki Isobe (RIKEN)12/09/2025, 14:309. Future experiments and facilities
The Radioactive Isotope Beam Factory (RIBF) at RIKEN is an accelerator-based experimental facility capable of producing energetic radioactive isotope beams by employing the large-acceptance fragment separator BigRIPS and the superconducting ring cyclotron SRC.
Go to contribution page
At RIBF, several experimental programs are underway to determine the nuclear equation of state (EoS) through studies of both nuclear... -
Tadaaki Isobe (RIKEN)12/09/2025, 15:00