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Nuclear and Quark-Nuclear Theory Lab (Quark-Nuclear Theory)
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A theory lab that explores everything from quarks to atomic nuclei to the elements of the universe.
AboutAbout the lab
From quarks to nuclei, from nuclei to the universe.
The Nuclear and Quark-Nuclear Theory Group studies phenomena ranging from the microscopic world in which atomic nuclei form out of quarks to the macroscopic phenomena of the life of stars.
At the smallest scale, the lab investigates how hadrons such as protons and neutrons arise through quark confinement and the spontaneous breaking of chiral symmetry.
The lab also works to understand how protons and neutrons form nuclei and produce diverse structures.
Using numerical analysis on supercomputers, including the supercomputer Fugaku, the lab carries out its research in cooperation with experimental groups.
Key terms
- Quantum chromodynamics
- The theory that describes the force acting between quarks. This lab studies atomic nuclei on the basis of it.
- Chiral symmetry
- A symmetry of quarks. The lab studies how hadrons form when this symmetry is spontaneously broken.
- Hadron
- A particle made of quarks. Protons and neutrons are among them.
NewsLab news
A paper by Associate Professor Kenichi Yoshida on proton-neutron pairing correlations in neutron-rich nuclei has been accepted by PTEP
A paper by Assistant Professor Kazuki Yoshida and colleagues on the observation of t and 3He clusters in stable Ca isotopes has been published in PTEP
A paper by Project Professor Atsushi Hosaka and colleagues on coupled-channel scattering of Zc(3900) has been accepted by PRD
A paper by the lab's researchers on the gravitational-wave spectrum of a first-order QCD phase transition has been accepted by PRD
A paper on the ΛcN correlation function has been accepted by PRD
ResearchResearch themes
Under the keyword "nuclei grounded in quantum chromodynamics," the lab studies phenomena in the world where nuclei form from quarks, as well as phenomena involved in the life of stars. Through precise nuclear reaction theory, it seeks to clarify the elemental composition of the universe and to reveal how we came into being from galaxies.
View More ↗MembersFaculty
The Nuclear and Quark-Nuclear Theory Group consists of faculty members, researchers, doctoral and master's students, visiting faculty, professors emeriti, and researchers with concurrent appointments.As of 2026
- ProfessorTetsuo Hyodo
- Associate ProfessorNoriyoshi Ishii
- Associate ProfessorKenichi Yoshida
- Project Associate ProfessorHideko Nagahiro
- Assistant ProfessorKazuki Yoshida
- Project Assistant ProfessorParikshit Junnarkar
- Project Assistant ProfessorYu Chengpeng
- Project ProfessorAtsushi Hosaka
- Project ProfessorMasayuki Matsuo
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Nuclear physics instruments” Unnerving duck / CC0 (cropped)
- Related lab (Fundamental Nuclear Physics Lab (Toyonaka Facility, Tamii Lab)): “Institute of nuclear and particle physics 00048 REP SDR-73 (0693)” DimitrisSideridis / CC BY-SA 4.0 (cropped)
- Related lab (Particle and Nuclear Reaction Group (Laser Electron Photon Experiments LEPS/LEPS2) Lab): “Columbia University Nevis Lab linear particle accelerator, beam injector. (photo mosaic)” CUBIST DEBRIS / CC BY-SA 4.0 (cropped)
- Related lab (Elementary Particle and Nuclear Reaction Lab (Double Beta Decay Experiment CANDLES)): “MINERvA Neutrino Detector 2011” KeysPhotography.com / CC BY-SA 4.0 (cropped)
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