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Onogi Lab (Particle Theory Group 2)
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The lab explores the fundamental theory of elementary particles using lattice gauge theory.
AboutAbout the lab
Exploring the fundamental theory of elementary particles through gauge theory
The Onogi Lab (Particle Theory Group 2) studies the fundamental theory of elementary particles based on gauge theory.
Focusing on phenomena that the Standard Model cannot explain, and on the dynamics and symmetry breaking behind them, the lab aims to establish a fundamental theory for a new era.
Its research themes are lattice gauge theory and its applications, and flavor structure and CP violation.
The lab conducts joint research with Particle Theory Group 1 (Kanemura) and Particle Theory Group 3 (Nishioka), and holds weekly seminars with them.
Key terms
- Lattice gauge theory
- A method that defines field theory on a discretized lattice. It is applied to QCD for calculations.
- Flavor structure
- The structure related to the generations (families) of elementary particles. It is regarded as one of the great mysteries of particle physics.
- CP violation
- A phenomenon that appears in connection with flavor structure. It is also key to how matter was generated in the universe.
ResearchResearch themes
The lab studies the fundamental theory of elementary particles based on gauge theory, focusing on the dynamics and symmetry breaking behind phenomena that the Standard Model cannot explain. Its themes are lattice gauge theory and its applications, and flavor structure and CP violation.
*Illustrative imageLattice gauge theory and its applications
Applying to QCD a method that defines field theory on a lattice makes it possible to derive quark confinement and spontaneous chiral symmetry breaking through first-principles calculations. Using the recently discovered fermion actions that preserve chiral symmetry exactly, the lab aims to study flavor structure and to predict phenomena such as the finite-temperature phase transition of QCD.
*Illustrative imageFlavor structure and CP violation
The lab studies the flavor structure of quarks and its origin, centered on the physics of Super B factories. For leptons, it works with experimental physicists to elucidate the properties of neutrinos through atomic physics using advanced laser technology.
MembersFaculty
The members of the Particle Theory Lab, to which the Onogi Lab belongs, consist of faculty, project assistant professors, research fellows, project researchers, doctoral, master's, and undergraduate students, and secretaries.As of 2026
- ProfessorTetsuya Onogi
- Assistant ProfessorMinoru Tanaka
- Assistant ProfessorHidenori Fukaya
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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: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Lattice gauge theory and its applications: “Oak Ridge - Kraken (Cray XT5)” Daderot / Public domain (cropped)
- Flavor structure and CP violation: “KEK Belle II Detector (1)” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (Itahashi Lab (Nuclear Experiment)): “ZEUS-Detektor 3D-Grafik” DESY-Kommunikation / CC BY-SA 4.0 (cropped)
- Related lab (Kanemura Lab (Particle Theory Group 1)): “CERN LHC CMS 09” SimonWaldherr / CC BY-SA 4.0 (cropped)
- Related lab (Kuroki Lab): “Α-Samarium crystal structure” Forbes72 / CC BY-SA 4.0 (cropped)
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