Featured News
Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) is an international research program at RIKEN. It facilitates close collaborations among researchers from different disciplines in theoretical, mathematical and computational sciences. The ultimate goal of iTHEMS is to unravel the mystery of the Universe, matter, and life, as well as to solve key problems in modern society through interdisciplinary approaches.
Upcoming Events
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Seminar
EHT-SgrA*(TBD)
August 26 (Fri) at 14:00 - 15:00, 2022
Dr. Yosuke Mizuno (Tsung-Dao Lee Institute, Shanghai Jiao Tong University, China)
Venue: via Zoom
Event Official Language: English
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Seminar
Study of the eta' meson in nuclei in the LEPS2/BGOegg experiment
August 26 (Fri) at 16:30 - 18:00, 2022
Dr. Natsuki Tomida (Specially Appointed Assistant Professor, Center for Science Adventure and Collaborative Research Advancement (SACRA), Graduate School of Science, Kyoto University)
A large mass reduction of eta'(958) meson in nuclear medium owing to its UA(1) anomaly is expected in several model calculations. We carried out the LEPS2/BGOegg experiment at SPring-8 to study eta' meson properties in nuclei. If there is a large mass reduction in nuclei, an eta' meson and a nucleus may form a bound state. We searched for the eta'-nucleus bound states via missing mass spectroscopy of the 12C(gamma, p) reaction. To suppress background events from multi-meson production, we simultaneously measured decay products from the eta'-nucleus system for the first time. We also carried out the missing mass spectroscopy simultaneously detecting an eta' meson escaping from a nucleus for the first time. We will show the experimental results and comparisons with theoretical calculations. We will also show the preliminary results of the line shape analysis of the invariant mass spectra of the eta'->2gamma decay in the gamma+12C->eta'+X reaction.
Venue: #246-248, 2F, Main Research Building (Main Venue) / via Zoom
Event Official Language: English
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Workshop
DM3 - Deep insights and Multiple strategies for Deciphering the Mystery of Dark Matter
September 15 (Thu) - 17 (Sat), 2022
Venue: SUURI-COOL (Kobe) / via Zoom
Event Official Language: English
Opportunities
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Seeking a Research Scientist or Senior Research Scientist (W21319) *theoretical and mathematical biology or biophysics
Deadline: Open until filled
Research Scientists or Senior Research Scientists a few positions. iTHEMS is seeking a research scientist or senior research scientist in theoretical and mathematical biology or biophysics. The successful applicant is expected not only to pursue top-level research in mathematical science but also to lead interdisciplinary collaborations among different fields such as mathematics, physics, chemistry, biology, information sciences, computational sciences, and social sciences, under the concept of iTHEMS.
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Seeking a Research Scientist or Senior Research Scientist (W21320) *mathematical sciences including pure mathematics
Deadline: Open until filled
Research Scientists or Senior Research Scientists a few positions. iTHEMS is seeking a research scientist or senior research scientist in mathematical sciences including pure mathematics, applied mathematics and information sciences. Successful applicant is expected not only to pursue top-level research in mathematical science but also to lead interdisciplinary collaborations among different fields such as mathematics, physics, chemistry, biology, information sciences, computational sciences, and social sciences, under the concept of iTHEMS.
Latest News
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2022-08-11
Paper of the WeekWeek 2, August 2022
Title: Calibration of nuclear charge density distribution by back-propagation neural networks Author: Zu-Xing Yang, Xiao-Hua Fan, Tomoya Naito, Zhong-Ming Niu, Zhi-Pan Li, Haozhao Liang arXiv: http://arxiv.org/abs/2205.15649v2 Title: Stability against three-body clustering in one-dimensional spinless p-wave fermions Author: Yixin Guo, Hiroyuki Tajima arXiv: http://arxiv.org/abs/2208.03654v1 Title: Thermal Ringdown of a Kerr Black Hole: Overtone Excitation, Fermi-Dirac Statistics and Holography Author: Naritaka Oshita arXiv: http://arxiv.org/abs/2208.02923v1 Title: Tricritical phenomena in holographic chiral phase transitions Author: Masataka Matsumoto arXiv: http://arxiv.org/abs/2208.02605v1
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2022-08-08
Hot TopiciTHEMS Science Outreach Workshop 2022 was held on July 29-31, 2022
On July 29-31, we had Meeting on Outreach of RIKEN iTHEMS 2022 @Kobe & Zoom. This year the meeting was hosted by Suuri Cool Kobe and the venue was the auditorium (8F) + the cafeteria (6F) of Kobe Integrated Innovation Building (IIB). This meeting was hit by the big growth of infected population by Covid-19 omicron BA.5. However, under careful preparation and precaution taken, 27 people participated at Kobe IIB and 24 more by zoom. There were 11 talks at the venue and 6 talks by zoom. 4 talks were by members of iTHEMS explaining recent development in various fields in sciences. 3 talkes were from universities on different aspects of research or fostering young researchers. 10 talks were given by journalists. There were also 3 posters (2 on research and 1 on a monthly academic magazine), in addition, the Black Hole Reacorder was exhibited at the cafeteria. The participants consist of 9+10 members from RIKEN, 6+4 from universities and 12+10 journalists (at venue + by zoom). By the success of this meeting, we hope the continuation of Journalist in residence program and this workshop next year.
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2022-08-08
Seminar ReportiTHEMS Math Seminar by Prof. Narutaka Ozawa on August 2, 2022
On August 2, Professor Narutaka Ozawa (RIMS, Kyoto University) gave a talk entitled "Product Replacement Algorithm, Semidefinite Programming, and Operator Algebras" in the iTHEMS Math Seminar. He elegantly explained how his recent study on Kazhdan's property (T) ties the field of functional analysis/operator algebras and that of computer sciences. Reported by Michiya Mori