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Experimental Particle Physics Lab
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A lab that uses accelerator experiments to probe the mysteries of elementary particles and the early universe.
AboutAbout the lab
Studying elementary particles with accelerators to probe the mysteries of the early universe.
The Experimental Particle Physics Lab studies elementary particles and their interactions through experiments using accelerators such as the LHC and J-PARC.
Its aim is to probe the mysteries of the early universe, and it also carries out development research for future experiments.
The lab's website introduces research activities on ATLAS, COMET, g-2/EDM, and FASER.
Key terms
- Standard Model
- The theory that explains the elementary particles known today. It was completed with the discovery of the Higgs boson
- Accelerator
- A device that accelerates particles to break apart protons and neutrons so that the particles inside them can be studied
- Higgs boson
- A particle discovered in 2012 that completed the Standard Model of particle physics
NewsLab news
Professor Tojo won the Breakthrough Prize in Fundamental Physics
Associate Professor Otono won the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (Research Category), FY2025
Associate Professor Otono won the 18th (2024) Young Scientist Award of the Physical Society of Japan
ResearchResearch themes
Through experiments using accelerators such as the LHC and J-PARC, the lab studies elementary particles and their interactions, aiming to probe the mysteries of the early universe. It also carries out development research for future experiments.
*Illustrative imageStudying the Higgs boson and more with the ATLAS experiment
The lab investigates energy-frontier physics in the ATLAS experiment, which uses the LHC accelerator at CERN. Research keywords include the Higgs boson and supersymmetry.
*Illustrative imageSearch for muon-to-electron conversion
The lab participates in the COMET experiment, which searches for muon-to-electron conversion at the J-PARC accelerator in Tokai, Ibaraki Prefecture. It advances the search for charged lepton flavor violation and explores physics beyond the Standard Model of particle physics.
*Illustrative imagePrecision measurement of the magnetic properties of the muon
At J-PARC, the lab participates in the g-2/EDM experiment, which precisely measures the muon's anomalous magnetic moment and electric dipole moment. The experiment aims to search for physics beyond the Standard Model of particle physics.
*Illustrative imageNeutrino observation in the FASER experiment
The lab participates in the international collaboration FASER. FASER is the experiment that made the first observation of neutrinos produced at the LHC, and it is pursued as research toward new physics beyond the Standard Model of particle physics.
MembersFaculty
The members of the Experimental Particle Physics Lab consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- ProfessorJunji Tojo
- Associate ProfessorHidetoshi Otono
- Assistant ProfessorShohei Shirabe
- Assistant ProfessorTomohiro Inada
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Report an errorAbout the images
For images provided to us or used with permission, the source is listed on each line. Wikimedia Commons images are illustrative and were not taken at the lab (they are cropped). Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “CMS Higgs-event” Lucas Taylor / CERN / CC BY-SA 3.0 (cropped)
- Studying the Higgs boson and more with the ATLAS experiment: “CERN LHC ATLAS Detector” SimonWaldherr / CC BY-SA 4.0 (cropped)
- Search for muon-to-electron conversion: “J-PARC muon experiment area” Kestrel / CC BY-SA 4.0 (cropped)
- Precision measurement of the magnetic properties of the muon: “Fermilab g-2 (E989) ring” Reidar Hahn / CC BY-SA 4.0 (cropped)
- Neutrino observation in the FASER experiment: “CERN Geneva, Neutrino detections chamber at protoDUNE experiment, seen from outside, Dec 2023 (Mark Benecke)” Markbenecke / CC BY-SA 4.0 (cropped)
- Related lab (Theoretical Physics of Particle Systems Lab): “Cosmic Microwave Background (CMB)” ESA and the Planck Collaboration / CC BY 4.0 (cropped)
- Related lab (Experimental Nuclear Physics Lab): “Tandem accelerator at Kyushu University” 九州大学 実験核物理研究室 / 提供：九州大学 実験核物理研究室 (cropped)
- Related lab (Condensed Matter Theory Lab): “Growing crystals in liquid glass” AgrisR / CC BY-SA 4.0 (cropped)
- Related lab (Particle Physics Theory Lab): “Elementary Particle Interactions” ParticlesAndMath / CC BY-SA 4.0 (cropped)
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