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Experimental Particle Physics (Accelerator) Lab
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A lab that explores the mysteries of elementary particles and the birth of the universe through accelerator experiments.
AboutAbout the lab
Probing elementary particles to approach the mysteries of the universe
The Experimental Particle Physics (Accelerator) Lab uses accelerator experiments to study elementary particles, the smallest building blocks of matter, and the interactions between them.
Particles are accelerated to nearly the speed of light and collided, recreating high-energy conditions like those of the early universe and producing the elementary particles that filled the universe at that time.
By studying these particles in detail, the lab aims to unravel the mystery of the birth of the universe and the fundamental laws that govern everything.
Research ranges widely, from detector development to physics analysis using big data analysis and machine learning.
Key terms
- Elementary particle
- The smallest building blocks of matter. The lab studies their properties and the interactions between them.
- Accelerator
- A device that accelerates particles to nearly the speed of light and collides them. It can recreate high-energy conditions like those of the early universe.
- Detector
- A device that captures and measures particles produced in collisions. The lab also develops detectors using advanced technology.
- CP symmetry
- A symmetry between particles and antiparticles. If it is broken, a difference can arise between the amounts of matter and antimatter.
ResearchResearch themes
The lab studies elementary particles and the interactions between them through accelerator experiments, aiming to unravel the mystery of the birth of the universe and the fundamental laws that govern everything. It takes part in three experiments (ILC, T2K, and AXEL), and students choose their topics from a broad range of research areas.
*Illustrative imageCP Violation in Neutrinos
To investigate whether neutrinos violate CP symmetry, the lab is advancing the T2K experiment and the Hyper-Kamiokande project. Neutrinos produced by the J-PARC accelerator are measured by a detector 295 km away.
*Illustrative imageSearch for Neutrinoless Double Beta Decay
To determine whether neutrinos are Majorana particles, the lab searches for neutrinoless double beta decay. In the AXEL experiment, it aims to conduct the search with a xenon gas detector offering high energy resolution, large mass, and low background events.
MembersFaculty
The members of the Experimental Particle Physics (Accelerator) Lab consist of faculty, doctoral and master's students, undergraduates, and research students.As of 2026
- ProfessorAtsuko Ichikawa
- Associate ProfessorKiseki Nakamura
- Assistant ProfessorLukas Berns
- Assistant ProfessorYosuke Ashida
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: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- CP Violation in Neutrinos: “Groeeser.Hamamatsu.Photomultiplier” Bautsch / CC0 (cropped)
- Search for Neutrinoless Double Beta Decay: “Collider Detector at Fermilab (CDF) silicon vertex detector cross section” Z22 / CC BY-SA 4.0 (cropped)
- Related lab (Experimental Particle Physics (Neutrino) Lab): “The Daya Bay Antineutrino Detector ( )” Roy Kaltschmidt, Lawrence Berkeley National Laboratory / Public domain (cropped)
- Related lab (Low-Temperature Materials Science Lab): “Superconducting Magnetic Separator Cryostat” Antonín Ryska / CC0 (cropped)
- Related lab (Microscopic Structural Properties Lab): “ESRF Grenoble 5” Brücke-Osteuropa / Public domain (cropped)
- Related lab (Quantum Functional Measurement Lab): “CETB Instrument and Measurement Laboratory 1” Teupdeg / CC BY-SA 4.0 (cropped)
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