Conveners
Plenary: Opening
- Su Houng Lee
Plenary: Plenary 1
- Makoto Oka
Plenary: Plenary 2
- Ulrich Wiedner (Ruhr-University Bochum (DE))
Plenary: Plenary 3
- Osamu Morimatsu
Plenary: Plenary 4
- Daisuke Jido (Institute of Science Tokyo)
Plenary: Plenary 5
- Masayasu Harada (Nagoya University)
Plenary: Plenary 6
- ELENA GONZALEZ FERREIRO (Universidade de Santiago de Compostela (ES))
Plenary: Plenary 7
- Feng-Kun Guo (Insitute of Theoretical Physics, Chinese Academy of Sciences)
Plenary: Plenary 8
- Toru Sato
Plenary: Plenary 9
- Tetsuo Hatsuda (RIKEN iTHEMS)
Plenary: Plenary 10
- Gyรถrgy Wolf
Plenary: Plenary 11
- Byungsik Hong (Korea University (KR))
Plenary: Awards and Closing
- Su Houng Lee
The spectrum of hadrons consists of bound states of quarks and gluons. The distinctive feature of strong interactions, described by Quantum Chromodynamics (QCD), is confinement, which prevents quarks and gluons from appearing as free particles. A new generation of dedicated experiments in hadron physics is underway with the goal of uncovering the properties of strong interactions and, in...
I present the scientific vision for a decade-long, cross-community hadron-physics program at the GSI/FAIR accelerator complex. Driven by high-intensity proton and secondary pion beams combined with versatile detector systems, the program will address some of the key questions in `strong QCD'. It encompasses precision studies of hadronโhadron interactions, baryon spectroscopy, transition form...
Present status and future prospects for studies of heavy pentaquarks from the LHCb and other experiments will be reviewed.
At BESIII, the electromagnetic form factors (EMFFs) and the pair production crosssections of various baryons have been studied. The proton EMFF ratio GE/GM is determined precisely and line-shape of GE is obtained for the first time. The recent results of neutron EMFFs at BESIII show great improvement comparing with previous experiments. Cross sections of various baryon pairs (Lambda, Sigma,...
Non-perturbative behavior of low-energy QCD is characterized by spontaneous breaking of chiral symmetry, non-trivial gluon field, and color confinement. However, it has not yet been clarified very clearly how they work in forming hadrons. This is an unanswered question concerning the origin and evolution of matter in the Universe. Spectroscopic studies of hadrons could provide information to...
The bulk of visible mass is supposed to emerge from nonperturbative dynamics within quantum chromodynamics (QCD) - the strong interaction sector of the Standard Model. Following years of development and refinement, continuum and lattice Schwinger function methods have recently joined in revealing the three pillars that support this emergent hadron mass (EHM); namely, a nonzero gluon...
In this talk, we discuss the concept of entanglement suppression in hadron scattering and its phenomenological consequences. Entanglement suppression, which has recently attracted attention, treats the hadron scattering S-matrix as a quantum logic gate in spin space, and derives emergent symmetries by minimizing the spin entanglement generated by the S-matrix. In this framework, emergent...
Lattice QCD is advancing our understanding of nucleon structure across a wide range of observables, tied together by a common goal: resolving how momentum and forces are distributed among quarks and gluons. In this talk I will focus on a recent breakthrough: a lattice QCD determination of twist-3 matrix elements encoding the transverse colour-Lorentz force acting on a struck quark in deep...
I plan to review recent progress we have made in lattice QCD calculations, focusing on the Compton amplitude and nucleon polarizabilities, the two-photon exchange contribution to the muonic hydrogen Lamb shift and proton charge radius extraction, as well as threshold electroweak pion production in electron-proton and neutrino-proton inelastic scattering.
It is well accepted that baryon number is carried by quarks, but no experimental evidence to definitely prove it to date. An alternative theory proposed in 1970s believes that a Y-shaped gluon topological structure connecting to three quarks, called baryon junction or gluon junction, can trace the baryon number. Although recent Lattice QCD calculations support the Y-shaped topological...
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...
Recent observations of neutron stars, together with lattice simulations of QCD-like theories at finite density, have renewed interest in the structure of hadrons in the context of high-density equations of state. In this review, I discuss how the stiffening of dense matter can be triggered by the onset of quark matter formation, or โquark saturationโ effects. The onset of this stiffening is...
The study of the nucleon excitation spectra allows to better understand
the dynamics of the constituents inside the nucleons and study quantum
chromodynamics (QCD) in the non-perturbative regime. Experimentally, the
nucleon excitation spectra can be investigated by studying different
meson photoproduction reactions. Partial wave analyses are performed in
order to extract the contributing...
While the Higgs mechanism might be responsible for the masses of the elementary particles, the mass-creation mechanism for hadrons is quite different. Less than 10% percent of the mass of the proton is due to the Higgs mechanism. Particles solely composed of gluons , however, are at the center of the strong interaction. Glueballs themselves would be massless without the strong interaction and...
The dynamics of quarks and gluons inside hadrons is a long-standing question in hadron physics. In recent years, additional compositions of quarks besides the conventional baryons and mesons have been observed, exclusively in states containing heavy quarks. Several questions arise, which include the formation of so-called exotic states composed of light quarks and the possible existence of...
In recent years, a series of exotic hadronic states containing more than three valence quarks have been discovered, though their underlying nature remains unclear. To advance our understanding of these states, the LHCb experiment has played a leading role in the discovery and detailed study of tetraquark candidates in both the charm and beauty sectors. Leveraging high-precision tracking,...
The first-principles determination of hadron interactions is one of the most important subjects in particle, nuclear and astrophysics. Obtained interactions are essential to understand, e.g., the structures of nuclei, equation of state of dense matter and physical mechanisms of exotic hadrons. In this talk, I will present recent development of lattice QCD studies for hadron interactions using...
Form factors are important physical quantities that characterize the internal structure of the nucleon. In the classical picture, they correspond to the Fourier transform of the nucleonโs three-dimensional density distribution. Among them, the electromagnetic form factors are the best known, with thousands of high-precision data points accumulated to date. The axial-vector form factor is...
Baryons are the most fundamental three-body systems in Nature, investigating the structure of baryons is a significant challenge in modern physics. The continuum Schwinger function methods (CSMs), when utilized judiciously, can provide meaningful predictions for the study of baryons, including their properties at nonzero temperature and chemical potential. In this talk, I will present the...
The proton charge radius, defined as the root-mean-squared charge radius, is one of
the most fundamental quantities related to the structure of the proton. It is important not
only for advancing our understanding of how QCD works in the non-perturbative region,
but also for QED calculations of bound atomic energy levels. Experimentally it has been
measured using both electron-proton...
J-PARC E16 and E88 experiments aim to study chiral-symmetry restoration of vector mesons by measuring their mass in $e^+e^-$ and $K^+K^-$ decays in proton-nucleus collisions. In the previous KEK-E325 experiment, the mass reduction of $\phi$ was observed at low velocity in p+Cu collisions in its $e^+e^-$ decay. E16 will measure several thousand $\phi \rightarrow e^{+}e^{-}$ events in p+C and...
In this talk, I will present an overview of recent investigations
into the behavior of hadrons in nuclear matter, with a particular
focus on vector and axial-vector mesons. These mesons serve as especially
sensitive probes for exploring in-medium modifications and are central
to several ongoing experimental programs, including the J-PARC E16
and E88 experiments.
I will begin by...
We are still far from understanding how QCD works. Baryon excited states have an important role to play in resolving the problem. In particular, we need to identify whether some states are better viewed as dynamically generated, rather than as three valence quark states. This issue is currently surrounded by some confusion. We aim to remove some of that confusion, as well as citing examples of...
Thermal dileptons, emitted throughout the space-time evolution of the hot QCD medium in relativistic heavy-ion collisions, interact weakly with surrounding partonic and hadronic matter. This minimal interaction makes them as idea penetrating probes, providing direct insights into the mediumโs properties. Their invariant mass spectra, unaffected by blue-shift effects from the mediumโs rapid...
This presentation will share preliminary results from our search for the H-dibaryon near the $\Xi^-p$ and $\Lambda\Lambda$ mass thresholds using the E42 detector. The E42 has collected two orders of magnitude more statistics than we have ever achieved before, enabling us to provide a definitive answer regarding the existence of the H-dibaryon.
Furthermore, we will introduce a new...
The strongly attractive antikaonโnucleon ($\bar K N$) interaction in the $I=0$ channel has led to the widespread interpretation of the $\Lambda(1405)$ resonance as a $\bar K N$ bound state, motivating the study of exotic antikaon-nuclear bound systems known as kaonic nuclei. At J-PARC, we have carried out a systematic experimental program to search for and study these systems, extending from...
Using the large $J/\psi$ and $\psi(3686)$ datasets from the BESIII experiment, recent studies have revealed significant transverse polarization in hyperon-antihyperon pairs such as $\Lambda\bar{\Lambda}$, $\Sigma\bar{\Sigma}$, $\Xi\bar{\Xi}$, and $\Omega^-\bar{\Omega}^+$, enabling the first model-independent determination of the $\Omega^-$ spin. Non-zero polarization allows independent...
The Hadron Experimental Facility at J-PARC provides unique opportunities to explore hadron physics with high-intensity kaon, pion, and anti-proton beams. A series of experiments use the Hyperon Spectrometer equipped with a GEM-based Time Projection Chamber (HypTPC) operated in a 1-T superconducting magnet. In this talk, I will briefly introduce the experimental environment at the J-PARC Hadron...
We have studied nucleon and hyperon resonances based on the experimental scattering data and lattice QCD simulations within Hamiltonian effective field theory. Some of them are very exotic, for example, the $\Lambda(1405)$ is mainly a $\bar K N$ molecule and the $N^*(1440)$ is dynamically generated. However, the traditional triquark states are still very important and exist in the excited...
Progress in lattice QCD computations of coupled-channel
meson-baryon
scattering amplitudes is reviewed. Particular attention is given to the
first
coupled-channel computation of the Lambda(1405) system, which identifies
an additional resonance pole corresponding
to the Lambda(1380). Further prospects for other baryon resonances are
also discussed.
Short-Range Correlations (SRC) in nuclei arise when nucleons are forced into close proximity by the tensor part of the nuclear force and subsequently repelled by its short-range core. These correlations are key to understanding the underlying dynamics of nuclear forces and the properties of dense nuclear matter, such as neutron stars. They also provide crucial experimental input for exploring...
Understanding the internal structure of the nucleon remains a fundamental challenge in nuclear and particle physics. Lattice Quantum Chromodynamics (LQCD) provides a rigorous, first-principles framework to study key nucleon properties, including parton distributions, form factors, and moments of generalized parton distributions. Recent advancements in computational algorithms, renormalization...
In recent years, laboratories around the world have conducted extensive measurements of the nucleon structures, in particular, to study generalized parton distribution functions (GPDs) of nucleon through processes of deep virtual Compton scattering and deep virtual meson production. We use the chiral effective field theory (EFT) to systematically investigate the various GPDs of nucleon and...
The proposed STCF is a symmetric electron-positron beam collider designed to provide e+e- interactions at a center of-mass energy from 2.0 to 7.0 GeV. The peaking luminosity is expected to be 0.5x10^35 cm-2s-1. STCF is expected to deliver more than 1 ab-1 of integrated luminosity per year. The huge samples could be used to study the spectroscopy, structure and decays of baryons, search for CP...
We describe a novel approach for QCD evolution based on the notion of effective charges. This approach is applied to the evolution of parton distribution and fragmentation functions, and in particular, gravitational form factors. Therefore, results obtained at genuinely low momentum scales, relevant for continuum Schwinger methods, can be consistently evolved up to empirical scales, enabling...
The study of exotic nuclei is essential for understanding the behavior of protons and neutrons in nuclei and for exploring the origin of the elements. The low-energy accelerator of the Rare Isotope Beam Facility called RAON in Korea successfully delivered a stable $^{40}$Ar beam for domestic users last year and is expected to provide additional stable and rare isotope beams in the near future....
This workshop offers a comprehensive overview of Elsevier and its various products, including an introduction to Elsevierโs High Energy Physics portfolio and the key features that support researchers in this field. Participants will also gain insights into our commitment to research integrity and publishing ethics, promoting responsible and transparent scholarly communication. Additionally,...
