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Graduate School Education Developing Knowledge Professionals

Acceptance of students to master's and doctoral programs

The University of Tokyo's School of Science provides young people with the education needed to solve future problems and lead the next generation of scientists. In order to develop these highly creative and international people, we accept applications for master's and doctoral programs every year.
ICEPP professors and associate professors operate research labs in the Department of Physics and accept graduate students. The students in our labs participate in overseas experiments. They develop practical and competitive abilities by working together with researchers from around the world, helping elevate each other to new heights. We support your efforts to take on the challenge of blazing trails into heretofore unexplored areas of elementary particle physics, high energy physics and astrophysics.

Research Lab Profiles

Professor Shoji Asai (Graduate School of Science)
ATLAS Experiment, Tabletop Experiment

The LHC at CERN carried out its second operational run from 2015 to 2018. The ATLAS experiment was even more successful than expected, having a record integrated luminosity in 2018. Preparations are underway for the 2026 HL-LHC Project, which is expected to produce discoveries that could rewrite textbooks. In the ATLAS Japan Group, in addition to being a physical analysis leader, in 2015, I also was appointed joint representative. The Japanese team plays a leading role in research, surrounded by fierce international competition, with the aim of providing further contributions following the discovery of the Higgs boson. In our analysis of the tremendous amount of data produced by the second run of the LHC, our central research theme is the Higgs. We perform physics data analysis with other research labs, and are dedicated to our search for supersymmetric particles and extra dimensions as we strive to make new physics discoveries that go beyond the Standard Model.
In Japan, we also conduct elementary particle experiments with the themes of light and vacuum using unique, innovative ideas. They are called "Tabletop experiments".

Research lab website

Professor Toshinori Mori
MEG Experiment, ILC Project

To verify the grand unification of the elementary particles and forces believed to have occurred in the early Universe (supersymmetric Grand Unified Theories (GUTs)), this research lab is leading the MEG international joint experiment, conducted at the Paul Scherrer Institute (PSI), investigating muon decay that is not possible under the Standard Model of elementary particle physics. The MEG experiment has drawn a lot of attention from all around the world, as it is the only experiment capable of researching the decay branching ratios predicted by ultra-high energy physics such as the GUTs or seesaw theory of neutrinos. My role as the primary investigator and spokesperson responsible for the entire international research group is to lead these important physics researches through a successful execution of the MEG experiment. We are currently preparing for MEG II, a further evolution of the MEG experiment. Our goal is to raise experimental sensitivity 10-fold and observe signs of new physics.
Furthermore, as the Japanese representative of the International Committee for Future Accelerator (ICFA) and a member of the Japan Association of High Energy Physicists (JAHEP), I look more than a decade into the future to consider and formulate next-generation core plans for global investigation at energy frontiers. I will continue to work on the ILC Project in these international committees and do my utmost to bring about its successful implementation in Japan.

Research lab website

Professor Masaya Ishino
ATLAS Experiment

The discovery of the Higgs boson completed the Standard Model of the elementary particle physics, and it served as the starting point for exploring beyond the Standard Model, e.g. understanding higher orders of symmetry and the nature of vacuums. The LHC at CERN, the world's highest energy accelerator, will be vital to achieving new discoveries. The increase in the power of the accelerator that will be achieved two years from now will greatly increase the potential of discovering new particles and new phenomena. All ATLAS collaborators are working together to prepare for Run 3. For success of Run 3, it is important to upgrade the detector system to cope with the improved performance of the LHC. In particular, the trigger system, which selects only interesting events containing new particles, is one of the key components of the experiment. Preparations are underway to deploy cutting-edge electronics technologies, completely replacing the system used since experimentation began.
Through these searches for new physics that will produce future scientific achievements, our laboratory dedicates itself to developing graduate students into the next generation of leading researchers.

Research Lab Profiles

Professor Junichi Tanaka
ATLAS Experiment

Our research lab participates in the ATLAS experiment, searching for new physics. We primarily focus on three research themes. The first is data analysis. Based on experience of researches that contributed to the discovery of the Higgs boson, we are moving forward with new research, such as the search for the next Higgs boson or supersymmetric particles. The next major theme is research and development aimed at upgrading detectors. We are updating and commissioning trigger read-out of liquid argon electromagnetic calorimeters and developing its FPGA firmware for fast computation of energy.
Computer science is also an important theme for future physical analysis. The high-luminosity LHC, which will become operational in 2026, and future large-scale experiments will produce almost unimaginably massive amounts of analysis data. In preparation for this, research and development is underway using cutting-edge IT technologies such as artificial intelligence, quantum computing and cloud computing. New ideas and various studies created from flexible thinking will lead to future scientific and social innovation.

Research lab website

Project Professor Satoru Yamashita
ILC Project

As momentum gathers behind the discovery of new physics and new phenomena at the LHC at CERN, progress is being made on accelerator experiment projects that will explore the next-generation energy frontier. The ILC is one of the most promising candidates. I play a central role in leading this project, which is being carried out through international collaboration between Europe, the U.S. and Asia. R&D and consensus-forming between international organizations is currently underway, and the ILC Project has entered a critical phase in which the details of its core are being decided. Japan's Kitakami mountains are a strong candidate site for the ILC, and we are working to ensure that the ILC comes to Japan.
Our research lab primarily participates in the development of a measurement equipment called the ILD. We demonstrate leadership in the simulation of target physical phenomena and the evaluation of measurement capabilities.
At J-PARC, Japan's most powerful proton accelerator facility, we are conducting the world's highest intensity elementary particle experiments using ultra-low energy neutrons. We also conduct off-campus classes and engage in numerous outreach activities aimed at fostering greater interest and understanding of elementary particle physics in society.

Research lab website

Associate Professor Wataru Ootani
MEG Experiment, ILC Project

The research interest of our lab is in experimental particle physics with particle accelerator aiming at elucidating the ultimate laws of the Universe. We actively engage in research activities as well as dedicating ourselves to educating students to be experimental physicists with various expertise for detector R&D and physics analysis.
There are two primary research projects in our lab. The first is the MEG experiment in search for μ→eγ with the world's highest sensitivity, which would be a definitive evidence of new physics such as supersymmetric grand unified theory if discovered. The second is the International Linear Collider (ILC), which is a next-generation international project with an electron-positron linear collider.
As the physical analysis coordinator of the MEG experiment, I have led physics analysis and achieved an unprecedented search sensitivity which is thirty times higher than the previous experiment. We are currently leading the development and construction of detectors for the upgraded experiment MEG II with much higher sensitivity. The MEG II experiment is to start soon, having high expectations for the discovery of new physics beyond the standard model.
For the ILC Project, We are working hard for the realization of the Project, focusing primarily on the development of high-granularity calorimeters based on a novel concept for the ILC detector (ILD).

Research lab website

Associate Professor Yasuyuki Okumura
ATLAS Experiment

We participate in the ATLAS experiment and carry out research through international collaboration and in the midst of international competition with the aim of discovering signs of new physics in experimental data. By carefully reviewing experimental data, we are testing hypotheses regarding new phenomena that contradict the Standard Model of particle physics, but are predicted by new physics models, such as unknown resonance states or the pair production of new particles with colour charges. We test these hypotheses from a variety of perspectives, seeking possible hints of new physics in massive amounts of experimental data.
In addition to data analysis, we also conduct wide-ranging research activities, such as operating and making improvements to the detector and hardware trigger of the ATLAS experiment and developing high-speed trigger electronics with cutting-edge technologies. One of the most important objectives of our group is to maximize the potential for new physics discoveries at the LHC through my work both with hardware and software.
Research is constantly advancing. Let us take on the new challenges that arise each day, such as combining our knowledge to create new ideas and solve problems within the time constraints due to experiment and machine operations. Let us enjoy making rapid progress through small yet steady steps at CERN.

Research lab website

Associate Professor Ryu Sawada
ATLAS Experiment

We participate in the ATLAS experiment at CERN and aim to discover new physics beyond the Standard Model. In addition to operating the ATLAS Regional Analysis Center, I also conduct research with the goal of improving computation performance for the high-luminosity LHC.
Our research lab focuses on applying state-of-the-art technologies such as machine learning and quantum computing to elementary particle physics. In the future, the ATLAS experiment will enter a phase in which it accumulates more data than ever. An important part of the approach to new physics discoveries will be efficient and accurate analysis of this big data. Applying machine learning to various data analysis processes will make it possible to greatly improve our ability to search for new particles. Applying quantum algorithms has the potential for dramatic advances.
Combining creativity and data analysis technologies will be essential for achieving advances in this innovative research. We support the efforts of those with a desire to learn and apply state-of-the-art computing technologies to make new physics discoveries.

Research lab website

Researcher Profiles

ATLAS Experiment

Associate Professor
Tetsuro Mashimo

Tetsuro Mashimo uses computing technologies to support the ATLAS experiment, the elementary particle physics experiment with the world's highest energy. Into the computer system of ICEPP he introduced grid technologies which makes it possible to handle the systems of over 150 research institutions worldwide as if they were a single system. He continuously improves the ICEPP computer system.

Assistant Professor
Yuji Enari/CERN

Yuji Enari performs precision measurement of coupling constants between Higgs bosons and third-generation bottom and top quarks. He also makes improvements to liquid argon electromagnetic calorimeters and develops new devices for use in future experiments.

Assistant Professor
Tomoyuki Saito/CERN

Tomoyuki Saito aims to further develop elementary particle physics and unravel the mysteries of the beginning of the Universe through the discovery of supersymmetric particles. In the ATLAS experiment, he works on detector upgrade in order to explore higher energy regions.

Project Assistant Professor
Michiru Kaneda

Michiru Kaneda is researching new physics such as miniature black holes and supersymmetric particles. He is developing and operating a global grid computation system for processing massive amounts of experimental data and is developing new analysis methods on it.

Project Assistant Professor
Masahiko Saito

Masahiko Saito aims to discover new physics by applying new technologies such as machine learning and quantum computing. He also operates and improves a grid system for processing large-scale data.

Assistant Professor
Koji Terashi/CERN

Koji Terashi leads physics-data analysis in the search for new physics, such as those predicted by extra dimensions and composite Higgs models. He develops a comprehensive program for covering a wide range of detector signatures in order to discover new particles.

Assistant Professor
Tatsuya Masubuchi/CERN

Tatsuya Masubuchi contributed to the discovery of a Higgs boson by analysing decay modes in which the Higgs boson decays into W' boson pairs. He is now performing precise measurement of the Higgs boson's property, the gateways to new physics. He also makes improvements to muon spectrometers.

Project Assistant Professor
Tomoe Kishimoto

Tomoe Kishimoto builds and operates systems for performing global-scale computation and data retention/utilization in order to handle large amounts of generated data. He also researches machine learning that uses big data.

Project Assistant Professor
Takuya Nobe/CERN

Takuya Nobe explores new physics beyond the Standard Model, such as extra dimensions, and perform verification of the Higgs mechanism using the final state of boson pairs. He also operates online trigger systems for data acquisition.

MEG Experiment

Assistant Professor
Toshiyuki Iwamoto/PSI

Toshiyuki Iwamoto carries out the MEG II experiment as run coordinators and technical coordinators and is responsible for the operation and calibration of liquid xenon gamma ray detectors. He aims to further increase experimental sensitivity and discover new physics.

Project Researcher
Kei Ieki/PSI

Kei Ieki is involved in the development, testing and installation of optical sensor MPPCs installed in liquid xenon gamma ray detectors. He develops new sensors in conjunction with Japanese companies and aims to perform ultra-accurate gamma ray measurement.

Project Assistant Professor
Yusuke Uchiyama/PSI

Yusuke Uchiyama develops new detectors for ultra-high-accuracy measurement of the positrons emitted from muon decay, for use in the MEG II experiment. He has proposed an innovative detector design using new photon sensors.

ILC Project

Assistant Professor
Junping Tian

In order to make the physics case of the ILC, Junping Tian is researching the precision Higgs physics, including Higgs boson self-couplings, etc., to elucidate the mysteries of electroweak symmetry breaking. He is also working on the detector optimization for the ILD on the physics performance.

Project Assistant Professor
Tomohiko Tanabe

Tomohiko Tanabe is engaged in design optimization of measurement ILD and the research and development of data analysis algorithms. His goal is to perform accurate measurement of Higgs bosons, for which expectations are high for the ILC, and to evaluate the detection sensitivity of dark matter particles.

Tabletop Experiments

Assistant Professor
Toshio Namba

Toshio Namba searches for phenomena that deviate from the standard model by using positronium, the lightest atom, consisting of only a paired electron and positron. He is also developing detectors that will produce future breakthroughs.

Project Researcher
Toshiaki Inada

Toshiaki Inada develops various magnets that generate powerful magnetic fields. He uses them together with high-luminosity x-rays and laser light to perform high-accuracy measurement of vacuum non-linear physics and high-sensitivity searches for undiscovered elementary particles.

Other elementary particle experiments

Assistant Professor
Yoshio Kamiya/Graduate School of Science

Yoshio Kamiya performs tests of gravity using slow neutrons, searches for new particles, tests of non-perturbative nonlinear QED under intense laser fields, and developments of detectors for future lepton colliders.

Assistant Professor
Yoshiyuki Onuki/Graduate School of Science Aihara Research Lab

Yoshiyuki Onuki aims to detect phenomena that go beyond Standard Model through SuperB Factory experiments at KEK. He is developing semiconductor radiation detectors that can be used in future high-energy experiments.

Assistant Professor
Yoshizumi Inoue/Graduate School of Science

Yoshizumi Inoue is involved in various projects including an experiment aiming at the direct detection of hidden-photon dark matter, development of a mobile neutrino detector, and obsevation of gamma-ray bursts from the thunder clouds utilizing a neutrino detector.

Graduate student acceptance figures

(Unit : people)

Number of
research labs
Doctorate
degree
Master's
degree
Total
2018 5 16 14 30
2017 6 13 14 27
2016 6 12 13 25
2015 6 11 16 27
2014 7 12 17 29
2013 6 10 11 21
2012 5 9 13 22
2011 5 10 11 21
2010 5 10 10 20

Degree acquisition figures

(Unit : people)

Doctorate
degree
Master's
degree
Total
2018 2 (2) 8 (7) 10 (9)
2017 6 (2) 10 (6) 16 (8)
2016 6 (4) 10 (6) 16 (10)
2015 1 (0) 13 (9) 14 (9)
2014 3 (1) 10 (7) 13 (8)
2013 5 (2) 7 (3) 12 (5)
2012 8 (4) 11 (8) 19 (12)
2011 3 (2) 6 (3) 9 (5)
2010 5 (4) 10 (7) 15 (11)

* Numbers of students that have acquired degrees using ICEPP research facilities. Numbers in parentheses indicate the number of ICEPP research lab members