Tomoya IIZAWA

Tomoya IIZAWA

Doctor of Science, Waseda University, 2017
Assistant Professor

Research group: High Energy Physics Group
Phone: +81-78-803-5655
E-mail: tomoya.iizawagarnet.kobe-u.ac.jp

Research Description

     The Standard Model of particle physics describes a wide range of experimental results with high precision, yet some phenomena and fundamental questions remain unexplained. My research explores physics beyond the Standard Model, with the goal of discovering new particles that could help resolve these open questions.
     I currently participate in the ATLAS experiment at the Large Hadron Collider (LHC) at CERN, near Geneva, Switzerland. My research focuses on measuring the anomalous magnetic moment of the tau lepton and searching for Higgs boson pair production to test the Standard Model precisely and probe new physics. I also develop trigger algorithms, contribute to the operation of the trigger system, and develop and upgrade muon detector readout electronics for the High-Luminosity LHC, scheduled to begin operation in 2030. In addition, I participate in the EBES experiment at the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan, pursuing searches for new particles using accelerators in Japan.

Main Publications

• Tomoya Iizawa et. al., Search for Sub-GeV Axion-Like Particles at the EBES Pilot Run Using a 4 GeV Positron Beam at the KEK Linac, Progress of Theoretical and Experimental Physics, Volume 2026, Issue 10, October 2026, 103C01.
• ATLAS Collaboration, A measurement of the high-mass ττ production cross-section at sqrt(s) = 13 TeV with the ATLAS detector and constraints on new particles and couplings, JHEP 10 (2025) 054, arXiv: 2503.19836 [hep-ex].
• ATLAS Collaboration, Combination of searches for pair-produced leptoquarks at sqrt(s) = 13 TeV with the ATLAS detector, Physics Letters B 854 (2024) 138736, arXiv: 2401.11928 [hep-ex].
• Tomoya Iizawa et al., New constraint on dark photon at T2K off-axis near detector, JHEP 11 (2023) 056, arXiv: 2308.01565 [hep-ph].
• Tomoya Iizawa et al., Relativistic particle measurement in jupiter’s magnetosphere with Pix.PAN, Experimental Astronomy 56 (2023) 371.
• ATLAS Collaboration, Search for pair production of third-generation leptoquarks decaying into a bottom quark and a τ-lepton with the ATLAS detector, Eur. Phys. J. C 83 (2023) 1075, arXiv: 2303.01294 [hep-ex].
• ATLAS Collaboration, The ATLAS Fast TracKer system, JINST 16 (2021) P07006, arXiv: 2101.05078 [physics.ins-det].