Why our Universe was bone and how it developed into the present state? Since its birth at the Big Bang, the Universe has experienced various drastic events. Because the Universe is not a stable object, we have to understand and explain the present state as a consequence of dynamical processes the Universe has experienced. Though many events in the History of the Universe have been clarified, many pieces are still missing to understand our Universe today.
Tomonaga Center for the History of the Universe (TCHoU) was founded in October 2017 as a research center at the University of Tsukuba. The mission of the Center is to clarify the genesis of the Universe as well as the origin of matter and life and to construct an integrated view of the History of the Universe, through international and interdisciplinary collaboration of particle, nuclear, and astrophysics as well as resonant cooperation of experimental and theoretical approaches.
Toward this goal, the center has established the following four research divisions:
Please visit
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[About the Center] for an overview of the Center.
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[Projects] for the research projects of the Center.
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[Organization] for the organization and members of the Center.
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[Materials] for reports and introductory materials.
The name Tomonaga Center comes from Dr. Sin-Itiro Tomonaga, the second Nobel Laureate from Japan, who made fundamental contributions in constructing relativistic quantum field theories, the renormalization theory, theory of collective motions, etc. and also a founder of the physics institute at Tsukuba.
Visit Tomonaga Memorial Room, Univ. Tsukuba and Tomonaga Exibition at the University of Tsukuba Gallery for more information about Dr. Tomonaga.
(Photo: Tomonaga Memorial Room)
We have a research workshop to share achievements, exchanging activities and future projects for all members of TCHoU.
Contact: Prof. N. Kuno
Contact: Assi.Prof. T. Iida
As the Session 4-1 of the Tsukuba Global Science Week, TCHoU is organizing the International Workshop on "Universe Evolution and Matter Origin" as an on-line workshop.
In order to answer various questions in basic natural science especially about the evolution of the universe and the origin of matter, University of Tsukuba has founded the "Tomonaga Center for the History of the Universe" (TCHoU). TCHoU includes the following four divisions; (1)Antarctic Astronomy, (2)Elementary Particles, (3)Quark Nuclear Matters, and (4)Photon and Particle Detectors. These 4 divisions are trying to cooperate together to shed light on the "dark-" matter, energy and galaxies, toward understanding the origin of matter, phase transition and structure formation as well as their fluctuation and evolution in our Universe. This session is to share the understanding of our fields and to discuss about the next step.
15:00-15:05 | Fumihiko Ukegawa | TCHoU, Univ. Tsukuba | Opening | |
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15:05-15:50 | Lijuan Ruan | BNL | Recent results from STAR experiment at RHIC-BNL | |
15:50-16:35 | Tetyana Galatyuk | TU Darmstadt/GSI | Probing cosmic forms of matter in the laboratory | |
16:35-17:20 | Yuhu Zhang | IMP | Precision mass measurements of short-lived nuclei at heavy ions storage ring in Lanzhou | |
17:30-18:15 | Wen Yin | Tokyo Metropolitan Univ. | Neutrino, dark matter, and new physics | |
18:15-19:00 | Shigeki Hirose | TCHoU, Univ. Tsukuba | Unraveling the mysteries of the Universe through Higgs: now and future of the energy frontier | |
19:10-19:55 | Satoki Matsushita | Inst. Astronomy and Astrophysics, Academia Sinica |
Greenland Telescope (GLT): Imaging the Black Hole Shadow and the Photon Ring | |
19:55-20:40 | His-An Pan | Tamkang Univ. | Neutrino, dark matter, and new physics | |
20:40-20:50 | Nario Kuno | TCHoU, Univ. Tsukuba | Closing |
Please click on the title for the presentation slide.
Contact: Prof. Akira Ozawa
Contact: Prof. S. Esumi
Contact: Prof. N. Kuno
Contact: Prof. F. Ukegawa
Lectures by astronomers will be held near Tanabata Day. The state-of-the-art research content will be explained in an easy-to-understand manner to the general public. (in Japanese)
Click on the poster for details.
13:30- | Koji Yoshikawa | (Univ. Tsukuba) | Supercomputer "Fugaku" × Large-scale structure of the universe × Neutrinos | |
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15:00- | Nario Kuno | (Univ. Tsukuba) | Let's take a radio telescope to Antarctica! -- In search of the best sky on earth | |
16:30 | End |
Contact: Prof. N. Kuno (TEL: 029-853-5080)
Assistant Professor Takuya Hashimoto (Division of the Antarctic Astronomy) held a press conference on ”Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang”, published in Nature, DOI: 10.1038/s41586-024-07703-7.
For more details, see the press release article and a web announcement of the Univ. of Tsukuba.
We have a research workshop to share achievements, exchanging activities and future projects for all members of TCHoU.
After the workshop, we have a get-together at Yasei-no-Mori. Please contact Assi.Prof. T. Iida for details.
Contact: Prof. F. Ukegawa
At the Kids' University, Science and Technology Week, University of Tsukuba, we presented an exhibition "Pursuit of the History of the Universe" for children.
Contact: Prof. F. Ukegawa
We held the Workshop at the Tomonaga Center for the History of the Universe (TCHoU) in our research division for Quark-Nuclear Matters on 29/Mar/2024 (Fri) afternoon by having presentations directly related to our projects according to the following agenda program of this workshop, we would like to invite and encourage all of you to join and have active discussions in the workshop. We will have this workshop with "in-person" participation at Univ. of Tsukuba, but we will have online zoom connection as indicated in the following. So I hope to see you all in Tsukuba, but even if you will not be able to come to Tsukuba, you could still participate in online.
Thank you very much for your active participations in terms of both giving the presentations and participating in the discussions in advance and for our future fruitful cooperation and collaboration.
13:00‐ | Fan Si | (USTC/U. Tsukuba) | Fluctuation analysis in STAR-BES2 | |
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13:30- | TadaAki Isobe | (RIKEN) | Experimental study of asymmetric nuclear matter EOS from heavy-ion reactions with RIBF-SPiRIT | |
14:00- | Tetsuaki Moriguchi | (U. Tsukuba) | Reaction cross sections for proton-drip line nuclei | |
14:30‐15:00 | coffee | |||
15:00- | Tatsuya Chujo | (U. Tsukuba) | ALICE FoCal and eIC | |
15:30- | Daiki Sekihata | (U. Tokyo) | ALICE Run3 and ALICE3 | |
16:00- | Yorito Yamaguchi | (Hiroshima U.) | RHIC & LHC to FAIR |
Contact: Asso.Prof. S. Esumi
TCHoU Workshop of AY 2023 on Particle Physics, organized by the Division of Elementary Particles, is held as follows. This workshop is free to access. Talks are given in Japanese.
Contact: Asso.Prof. Y. Takeuchi
Assistant Professor Takuya Hashimoto (Division of the Antarctic Astronomy) held a press conference on ”Molecular outflow in the reionization-epoch quasar J2054-0005 revealed by OH 119 μm observations”, published in The Astrophysical Journal, DOI: 10.3847/1538-4357/ad0df5..
For more details, see the press release article and a web announcement of the Univ. of Tsukuba.
Contact: Assi.Prof. T. Iida