Conveners
Parallel Session (B)
- Masakiyo Kitazawa (YITP, Kyoto University)
Parallel Session (B)
- Takayasu Sekihara (Kyoto Prefectural University)
Parallel Session (B)
- Natsuki Tomida
Parallel Session (B)
- Satoru Hirenzaki (Nara Women's University)
Parallel Session (B)
- Natsuki Tomida
We perform a numerical study in lattice QCD on $\Lambda(1405)$ in the flavor SU(3) limit. Previous studies based on the chiral symmetry have suggested that the spectrum corresponding to $\Lambda(1405)$ observed in experiments may be explained by a combination of two poles. To elucidate such property from lattice QCD, the HAL QCD method is employed, in which hadron interactions are extracted as...
Baryon-baryon interactions are crucial for understanding phenomena at nuclear length scales and beyond. Advances in lattice QCD have enabled detailed studies of these interactions, particularly at heavier quark masses. In this talk, I will present recent progress in the field, focusing on our work with systems entirely composed of charm quarks, including baryons and dibaryons. Utilizing...
In addition to the applicability of lattice simulations in dense medium, two-color QCD world has another advantage that diquark dynamics can be directly observed since diquarks are color-singlet for Nc=2. In this talk, first I explain how a chiral model, i.e., linear sigma model, for Nc=2 and Nf=2+1 is constructed. Then, based on it, I present diquark mass modifications at finite temperature...
Compared to the strong interaction, the binding energy of the Coulomb interaction is about 1/1000, so it is usually neglected. However, the binding energy of Χ(3872) is extremely small compared to many other hadrons, suggesting that the effect of the Coulomb interaction must be considered. In this talk, we consider the bound state using Coulomb plus square well potential model. We numerically...
In hadron physics, the near-threshold exotic hadrons have been actively studied, motivated by the recent experimental reports. One of the possible internal structures of exotic hadrons is the hadronic molecular state, which is the composite state of two hadrons. The fraction of the hadronic molecular component in the wavefuction is called the compositeness [1]. Through an analysis of the...
Multi-strangeness systems, such as $\Xi$ hypernuclei and double $\Lambda$ hypernuclei, are of crucial importance for understanding baryon-baryon interactions and
the nuclear matter equation of state. $Xi$-atoms, where a $\Xi^-$ is trapped in atomic states around a nucleus, is a good playground to investigate the optical potential
a $\Xi^-$ feels in nuclei and thus to study the $\Xi N$...
Near-threshold exotic hadrons are studied actively. In order to understand the nature of them, it is necessary to determine the scattering length from experimental data, because the scattering length governs the near-threshold scatterings. The cusp structure of cross sections reflects the value of the scattering length.
In this work, we study the behavior of threshold cusp in multi-channel...
"Recent theoretical and experimental studies have provided insights into the properties of the $\bar{K}N$ interaction. Theoretically, it has been argued that the formation of a molecular-like quasi-bound state, $\Lambda$(1405), arises from the strong attraction between $\bar{K}$ and nucleon with isospin I = 0 channel. Experimentally, the K-pp three-body system, the lightest Kaonic nucleus, was...
Nucleon-antinucleon interactions have been extensively studied. Recently, it is pointed out that the p-pbar enhancement and X(1835) resonance, observed in the BESIII experiment, may be related to low-energy nucleon-antinucleon interaction. We propose a new experiment of low-energy antineutron-proton scattering, which is free from the Coulomb interaction effect. We also address open questions...
The U(1) axial anomaly is a fundamental aspect of QCD, and its properties can be examined through topological susceptibility. Recent first-principle calculations, such as lattice QCD studies with two or three colors, have investigated the topological susceptibility at finite temperature and finite quark chemical potential. While these results are expected to provide valuable insights into the...
We calculate the $D_s$-, $B$-, $D$- and $K$-nucleus bound state energies and coordinate space radial wave functions by solving the Klein-Gordon equation in momentum space.
The attractive strong potentials for the mesons in nuclei are calculated from the mass shifts of these mesons in nuclear matter in the local density approximation.
The mass shift of the $B$, $D$, and $K$ mesons are...
We study the possibility of the formation of mesons ($K,~D,~B$ as well as $\phi$, charmonia, and bottomonia) bound in atomic nuclei.
The open strange and open heavy flavor mesic-nuclei are studied using the mass modifications of the mesons in nuclear matter within the quark meson coupling model [1,2].
The hidden-flavor ($\phi$) meson-nucleus bound states are studied with the mass...
We conducted high-precision pionic atom spectroscopy experiments at RIBF using the (d, 3He) reaction. A pionic atom is a system in which π- mesons are deeply bound to the atomic orbitals of nuclei by attractive Coulomb forces and repulsive strong forces.
Evaluation of the partial restoration of chiral symmetry in finite density has been successfully performed at GSI and RIBF. Both...
The hypertriton ($^3_\Lambda \text{H}$) is the lightest Lambda-Hypernucleus, consisting of one proton, one neutron, and a Lambda.
Its mass and lifetime have been measured using emulsion techniques and heavy-ion collision experiments.
Their relationship has been observed to deviate from theoretical predictions, which is known as the 'hypertriton puzzle'.
The accuracy of measured...
In this talk I will present a method to compute the properties of dilute nuclear matter from quantum field theory at finite density. This approach provides a parameter-free calculation of the energy per particle of nuclear matter relying only on experimental nucleon-nucleon phase shifts. This method can be used to compute the equation of state of dilute symmetric and neutron matter. As...
Topic of neutron skin is interesting aspect of nuclear physics. Experiments like NA61/SHINE, PREX II and others may give us data for deeper understanding of this area of physics, helping to improve the theory. Different elements of the theory, like slope parameter, can be explored better by both - simulations and experiment.
In my talk I would like to focus on the theoretical results related...
Relativistic nuclear collisions serve as a powerful tool for exploring the QCD matter in the vicinity of the quark-hadron crossover. We investigate diffusion dynamics in the hot and dense QCD matter based on the numerical hydrodynamic model with a state-of-the-art equation of state at finite densities.
