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Yagyu Lab
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A particle phenomenology lab that searches for new physics through the structure of the Higgs sector.
AboutAbout the lab
Opening the door to new physics by elucidating the Higgs sector.
The Yagyu Lab conducts research from the standpoint of particle phenomenology, with an interest in clarifying the origin of spontaneous electroweak symmetry breaking.
In the Standard Model, electroweak symmetry is broken when the Higgs boson acquires a vacuum expectation value, but the overall structure of the Higgs sector is still unknown.
Phenomena that the Standard Model cannot explain, such as neutrino oscillations and the existence of dark matter, are expected to be explained by new physics.
The lab pursues its research on the grounds that elucidating the structure of the Higgs sector may reveal new physics.
Key terms
- Standard Model
- The theoretical framework of elementary particles. It includes the mechanism by which the Higgs boson breaks electroweak symmetry, but there are phenomena it cannot explain
- Spontaneous electroweak symmetry breaking
- The mechanism by which electroweak symmetry is broken, which in the Standard Model is understood to occur when the Higgs boson acquires a vacuum expectation value
- Higgs sector
- A collective term for the part of the theory involving the Higgs boson. Its overall structure is still considered unknown
- New physics
- Theories beyond the Standard Model. They are expected to explain phenomena the Standard Model cannot, such as neutrino oscillations and dark matter
ResearchResearch themes
Phenomena that the Standard Model cannot explain are expected to be explained by new physics. The lab works to fully elucidate the Higgs sector, which is the key to opening the door to new physics.
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MembersFaculty
The members of the Yagyu Lab are faculty, master's students, and undergraduates.As of 2026
- Associate ProfessorKei Yagyu
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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: “Large Hydron Collider Segment photographed by Robbie Conceptuel” Conceptuel / CC0 (cropped)
- Elucidating the Structure of the Higgs Sector: “Elementary Particle Interactions” ParticlesAndMath / CC BY-SA 4.0 (cropped)
- Related lab (鈴木研究室): “CERN Large Hadron Collider” Chris Mitchell / CC BY-SA 4.0 (cropped)
- Related lab (加瀬研究室): “LIGO Hanford aerial 05” LIGO Laboratory / Public domain (cropped)
- Related lab (二国研究室): “Bose-Einstein Condensate (BEC) ( )” National Institute of Standards and Technology / Public domain (cropped)
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