We study various phenomena governed by Strong Force, which is one of the fundamental forces in nature, particularly the structure and properties of hadrons, the mechanism of the mass generation and quark confinement.
Ground Floor, Main Building, Ookayama Campus
2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550 Japan
2026.3.23-26
At 2026 Spring Meeting, the Physical Society of Japan (online), Nakane (M2) gave an oral presentation on "K1 mixing angle dependence on the isosinglet mixing of the axial vector mesons" (in Japanese).2026.3.16
At Mini-Workshp on Kbarに関わる反応 ミニ研究会, Kawamura (M1), Dr. Murakami (PD) and Yasunaga (D2) gave an oral presentations on "構成粒子の運動量分布に基づくポテンシャルのサイズの推定" (in Japanese), "ポテンシャルサイズから探るハドロン内部構造" (in Japanese), "K-d反応におけるYN終状態相互作用" (in Japanese), respectively.2026.2.16-18
At YITP workshop on 核力・ハドロン間相互作用と量子多体計算の進展, Dr. Murakami (PD) gave an oral presentation on "Lattice QCD studies on meson-nucleon interactions and genuine pentaquarks" (in Japanese).2025.11.25-26
At RARiS workshop C047 on 実験・有効理論・格子シミュレーションで探るハドロンダイナミクス, Kihong Kwon (M2), Kawamura (M1), Nakane (M2), Hasegawa (M1) and Dr. Murakami (PD) gave an oral presentation on "Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory", "Estimation of potential size based on momentum distribution of constituent particle" (in Japanese), "The source of flavor SU(3) breaking on axial vector mesons as chiral partners of vector mesons" (in Japanese), "Calculation of Bs and Λb semileptonic decays in heavy quark effective theory to probe symmetry between anti-s quark and ud diquark" (in Japanese), "S-wave kaon-nucleon interactions and Θ+ pentaquark from lattice QCD" (in Japanese), respectively.2025.11.10-14
At International Conference on the Structure of Baryons, Dr. Murakami (PD), Kihong Kwon (M2), Suda (D3), Prof. Jido, Kawamura (M1), Nakane (M2), Yasunaga (D2) and Hasegawa (M1) gave an oral presentation on "S-wave kaon-nucleon interactions and Θ+ pentaquark from lattice QCD", "Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory", "Different scenarios of dynamical chiral symmetry breaking in the interacting instanton liquid model via flavor symmetry breaking", "K+N Elastic Scatterings for Estimation of the In-Medium Quark Condensate with Strange Quarks", "Estimation of potential size based on momentum distribution of constituent particle", "The source of flavor SU(3) breaking on axial vector mesons as chiral partners of vector mesons", "Hyperon-nuclon intetraction through the K-d→πΛN reaction", "Calculation of Bs and Λb semileptonic decays in heavy quark effective theory to probe symmetry between anti-s quark and ud diquark", respectively.2025.11.11
Paper submitted
Isotone Chain Study of p-atom spectroscopy and Strong Spin-orbit splittings [arXiv:2511.07169]
Kenta Yoshimura, Shunsuke Yasunaga, Daisuke Jido, Hiroyuki Fujioka2025.10.21-23
Intensive lecture
Lecturer: Dr. Masakiyo Kitazawa (YITP, Kyoto University)
Subject: 「Phase transitions in dense and hot QCD matter」2025.10.7
Paper published
Interrelation between p-Ca Atom Spectra and Nuclear Density Profiles
Kenta Yoshimura, Shunsuke Yasunaga, Daisuke Jido, Junko Yamagata-Sekihara, Satoru Hirenzaki
Progress of Theoretical and Experimental Physics 2025 (2025)
2025.10.6
Seminar
Speaker: Dr. Tsuyoshi Miyatsu (Soongsil University)
Title: 「Neutron Star Physics: Nuclear and Hadronic Aspects」2025.10.3
Paper accepted
Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory [arXiv:2507.01398]
Kihong Kwon, Yamato Suda, Stephan Hübsch, Daisuke Jido
Physical Review C.2025.9.16-19
At 80th Annual Meeting, the Physical Society of Japan (Hiroshima University), Kawamura (M1), Kwon (M2), Murakami (PD), Yasunaga (D2), Suda (D3), Maeda (D2), Hasegawa (M1) and Nakane (D2) gave oral presentations on "Estimation of potential size based on momentum distribution of constituent particle" (in Japanese), "Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory", "S-wave kaon-nucleon interactions and Θ+pentaquark from lattice QCD" (in Japanese), "Hyperon–Nucleon Final-State Interactions in the K− reaction" (in Japanese), "Different scenarios of dynamical chiral symmetry breaking in the interacting instanton liquid model via flavor symmetry breaking" (in Japanese), "Configuration mixing in mass spectra of bottom baryons under strong magnetic field" (in Japanese), "Semileptonic weak decays of heavy baryon and heavy mesons in the heavy quark effective theory" (in Japanese), "The origin of the SU(3) symmetry breaking in axial vector mesons as chiral partners" (in Japanese), respectively.2025.9.5-9
At Workshop on Dense Nuclear Matter from Chiral Effective Theories 2025, Prof. Jido and Kwon (M2) gave oral presentations on "K+N Elastic Scatterings for Estimation of the In-Medium Quark Condensate with Strange Quarks" (invited talk) and "Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory", respectively.2025.8.14
Paper published
Different scenarios of dynamical chiral symmetry breaking in the interacting instanton liquid model via flavor symmetry breaking
Yamato Suda, Daisuke Jido
Physical Review D112, 034011 (2025).2025.7.25
Paper published
K−d→πΛN reaction with in-flight kaons for studying the ΛN interaction」
Shunsuke Yasunaga, Daisuke Jido, Takatsugu Ishikawa
Physical Review C122, 015208 (2025).2025.7.8
Seminar
Speaker: Prof. Shigehiro Yasui (Nishogakusha University)
Title: 「Superfluidity of chiral doublet baryons in neutron stars」2025.7.3
Paper submitted
Pion properties in isospin-asymmetric nuclear matter using in-medium chiral perturbation theory [arXiv:2507.01398]
Kihong Kwon, Yamato Suda, Stephan Hübsch, Daisuke Jido2025.4.2-4
At YITP international workshop on Hadron in Nucleus (HIN2025) , Dr. Murakami (PD) gave an oral presentation on "Lattice QCD studies on Kbar-N interactions and Lambda(1405) in the flavor SU(3) limit".2025.3.27-31
At The 21st International Conference on Hadron Spectroscopy and Structure (Hadron2025), Dr. Kurakami (PD）and Suda (D2) gave oral presentations on "S-wave kaon-nucleon interactions and Θ+ pentaquark from lattice QCD" and "Possible scenarios of dynamical chiral symmetry breaking in the instanton liquid model with the SU(3) asymmetric quarks", respectively.2025.3.24
Seminar
Speaker: Prof. Laura Tolos (ICE-CSIC, Barcelona)
Title: 「Hyperons in Neutron Stars and Mergers」2025.3.18-21
At 2025 Spring Meeting, the Physical Society of Japan (online), Murakami (PD), Suda (D2), Hirama (M2), Murakami (PD), Nakane (M1), Kawamura (B4) and Maeda (M1) gave oral presentations on "Calculation of compositeness for hadron physics through momentum scale decomposition" (in Japanese), "Patterns of spontaneous chiral symmetry breaking in the instanton liquid model with 2 and 2+1 flavor quarks" (in Japanese), "Estimation of final state interaction in K+d → KNN reaction" (in Japanese), "Lattice QCD calculation of kaon-nucleon interactions on the physical point" (in Japanese), "Mass spectra of the vector and axial vector mesons using the linear sigma model" (in Japanese), "System size probed by momentum distribution of a particle bound in an effective potential" (in Japanese) and "Mass spectra and spatial sizes of bottom baryons under strong magnetic field" (in Japanese), respectively.2024.12.20
Seminar
Speaker: Victor Montesinos (IFIC, University of Valencia)
Title:「Charge-conjugation asymmetry and molecular content: Hadronic molecules in nuclear matter」2024.12.17
Paper published
Investigation of kaonic atom optical potential by the high precision data of kaonic 3He and 4He atoms
J. Yamagata-Sekihara, Y. Iizawa, D. Jido, N. Ikeno, T. Hashimoto, S. Okada, S. Hirenzaki,
Progress of Theoretical and Experimental Physics 2025, 013D02 (2025).2024.11.20-21
At RARiS Workshop on "実験、反応・構造計算、格子QCD で解き明かすハドロン分光 2024" Prof. Jido, Murakami (PD), Suda (D2), Nakane (M1), Hirama (M2), Yasunaga (D1), Honda (M2), Maeda (M1) and Yoshimura (D1 of Sekizawa group) gave oral presentations on "Compositeness of hadrons with intrinsic energy dependent potential", "A new method for calculating compositeness using lattice QCD data", "Possible scenario of dynamical chiral symmetry breaking in the instanton liquid" (online), "The study of the (axial-) vector mesons using the linear sigma models", "K+d reaction for the determination of KN scattering amplitude", "Spectra near the ΣN and KbarN thresholds of the K−d → πΛN reaction", "Vector meson in 3 flavor NJL model incorporating gk term", "Mass spectra of Λb and Σb under a magnetic field using the Cylindrical Gaussian Expansion Method" and "A study in interplay between the antiprotonic Ca spectroscopy and nuclear density profiles", respectively.2024.11.12
Paper published
Possible solution to the difficulty in the interpretation of deuteron compositeness
Zanpeng, Daisuke Jido,
Physical Review C110, 055202 (2024).2024.10.29
Suda（D2）obtained Student Presentation Award of the Physical Society of Japan2024.10.1
The name of the university has changed to "Institute of Science Tokyo" due to the merger between Tokyo Medical and Dental University and Tokyo Institute of Technology.2024.9.16-19
At 79th Annual Meeting, the Physical Society of Japan (Hokkaido University), Yoshimura (D1 of Sekizawa group), Prof. Jido, Hirama (M2), Yasunaga (D1), Honda (M2), Maeda (M1), Akiyama (D2), Yin (D3) and Suda (D2) gave oral presentations on "A study in strong shifts of anti-protonic Ca isotopes using the optical model" (in Japanese), "In-medium strange quark condensate based on correlation function method and low-energy KN scattering" (in Japanese), "K+d reaction for the determination of KN scattering amplitude" (in Japanese), "The ΣN cusp structure in the ΛN spectrum of the K-d→πΛ reaction" (in Japanese), "Vector meson mass spectra in the NJL model improved by a term explaining the inverse mass ordering of scalar mesons" (in Japanese), "Mass spectra of Λb, Σb, Σ*b under strong magnetic field" (in Japanese), "Corrected sum rule for weak decays of heavy hadrons based on the dynamical supersymmetry of the anti s quark and the ud diquark" (in Japanese), "Towards New Definition of Compositeness: Energy Scale Decomposition" and "The possibility of the anomaly-driven breaking of chiral symmetry in the interacting instanton liquid model" (in Japanese), respectively.