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Jinnouchi Lab
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A particle physics experiment lab that searches for unknown elementary particles at the Large Hadron Collider (LHC).
AboutAbout the lab
A team searching for unknown elementary particles
The Jinnouchi Lab uses high-energy particle physics experiments to search for unknown new particles and for new physics beyond the framework of current particle theory.
Using the ATLAS detector at the Large Hadron Collider (LHC) at CERN, the lab aims to discover physics beyond the Standard Model of particle physics.
Doctoral students stay at CERN for medium to long periods to analyze data, while master's students work on detector research based at the university.
Lab visits are accepted at any time.
Key terms
- LHC
- The Large Hadron Collider at CERN, which collides protons with each other at high energy
- Standard Model
- The current fundamental theory of particle physics, which explains the elementary particles that make up matter and the forces acting between them
- tracking detector
- A detector that precisely measures the paths (tracks) taken by particles produced in collisions
- dark matter
- Matter thought to be abundant in the universe, yet it emits no light and its nature remains unknown
NewsLab news
View More ↗ResearchResearch themes
Centered on the ATLAS experiment at the LHC, the lab works on operating the running detector and evaluating its performance, analyzing the collected experimental data, and developing technology for future detector upgrades. Together with researchers in Japan and abroad, it is carrying out production testing of Pixel modules for the new Inner Tracker that will be used in the High-Luminosity LHC experiment.
*Illustrative imageOperating the Inner Detector
The lab is involved in operating the Pixel detector, the innermost part of the Inner Detector, and the SCT outside it. It also takes part in efforts to monitor data quality so that problems are found early, and to improve the accuracy of track reconstruction.
*Illustrative imageData analysis for the ATLAS experiment
The lab analyzes data collected at the LHC to search for candidates for supersymmetric particles and dark matter. Doctoral students take the lead, and master's students also work on limited topics.
*Illustrative imageDetector development for the HL-LHC
For the HL-LHC project, which upgrades the LHC, the lab participates, jointly with a team at KEK, in developing new Pixel-type silicon sensors. Beam tests are carried out at CERN, DESY, and elsewhere to evaluate their performance.
*Illustrative imageSmall-scale particle physics experiments
These are experiments small enough to be done in a university laboratory, carried out mainly by undergraduates doing their graduation research. The emphasis of the topics shifts a little each year, and the measurement instruments are increasing in number. The equipment is also used at the KEK Summer Challenge.
MembersFaculty
The members of the Jinnouchi Lab consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- ProfessorOsamu JinnouchiPublications ↗
- Assistant ProfessorKazuki TodomePublications ↗
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: “CERN LHC ATLAS Detector” SimonWaldherr / CC BY-SA 4.0 (cropped)
- Operating the Inner Detector: “ATLAS SCT” SCZenz / CC BY-SA 3.0 (cropped)
- Data analysis for the ATLAS experiment: “Round hay bales on a field, with hawkweed in the foreground, near Durnal, Yvoir, 2025” DimiTalen / CC0 (cropped)
- Detector development for the HL-LHC: “Silicon pixel detector-IMG 5766” Rama / CC BY-SA 3.0 fr (cropped)
- Small-scale particle physics experiments: “Artificial nuclide americium-241 emitting alpha particles inserted into a cloud chamber for visualisation” Nuledo / CC BY-SA 4.0 (cropped)
- Related lab (久世研究室): “Views of the LHC tunnel sector 3-4, tirage 2” Maximilien Brice (CERN) / CC BY-SA 3.0 (cropped)
- Related lab (風間研究室): “Xenon-glow” Jurii / CC BY 3.0 (cropped)
- Related lab (素粒子論研究室
（伊藤・ 今村研究室） ): “CalabiYau5” Andrew J. Hanson / CC BY-SA 3.0 (cropped) - Related lab (賀川研究室): “Meissner effect p1390048” Mai-Linh Doan / CC BY-SA 3.0 (cropped)
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