# Press Release

## Using the K computer, scientists predict exotic “di-Omega” particle

2018-05-24

Based on complex simulations of quantum chromodynamics performed using the K computer, one of the most powerful computers in the world, the HAL QCD Collaboration, made up of scientists from the RIKEN Nishina Center for Accelerator-based Science and the RIKEN Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS) program, together with colleagues from a number of universities, have predicted a new type of “dibaryon”—a particle that contains six quarks instead of the usual three. Studying how these elements form could help scientists understand the interactions among elementary particles in extreme environments such as the interiors of neutron stars or the early universe moments after the Big Bang.

# Upcoming Events

## Workshop

### iTHEMS Science Outreach Workshop 2018

June 1 - 4, 2018

This is a workshop in which researchers in natural and mathematical sciences and the science journalists get together and discuss outreach activities. iTHEMS started to support this annual workshop as well as the journalist in residence program from last year to establish better science communication.

Contact: Takashi Tsuboi (iTHEMS Deputy Director)

tsuboi@ms.u-tokyo.ac.jp

Venue: Tambara Institute of Mathematical Sciences, The University of Tokyo

Event Official Language: Japanese

## Math Lecture

### Introduction to Public-Key Cryptography Lecture 4: RZSA encryption

June 7 at 10:30 - 12:00, 2018

Dr. Eren Mehmet Kıral (Visiting researcher, RIKEN Center for Advanced Intelligence Project)

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

## Colloquium

### On the interplay between intrinsic and extrinsic instabilities of spatially localized patterns

June 7 at 15:00 - 16:30, 2018

Prof. Yasumasa Nishiura (Professor, Advanced Institute for Materials Research, Tohoku University)

Venue: Nishina Hall, 2F Nishina Building, RIKEN

Broadcast: #305-2, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University

Event Official Language: English

## Seminar

### 1-form Lieb-Schultz-Mattis theorem and anomaly matching in quantum dimer model

June 8 at 13:30 - 17:00, 2018

Dr. Yuta Kikuchi (RBRC Researcher, Theory Group, RIKEN BNL Research Center)

Event Official Language: Japanese

## Math Lecture

### Theory of Operator Algebras (2nd)

June 21 at 15:30 - 17:00, 2018

Dr. Yosuke Kubota (Research Scientist, iTHEMS)

Please note that the date and time of the 2nd lecture has been changed from May 21 10:30 to June 21 15:30.

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

## Math Lecture

### Computational Algebraic Statistics and its Applications

June 26 at 10:00 - 16:30, 2018

Prof. Satoshi Aoki (Professor, Department of Mathematics, Kobe University)

Lecture 1 (10:00-11:30)

An introduction of Groebner bases of polynomial rings

Lecture 2 (13:00-14:30)

Groebner bases theory in design of experiments

Lecture 3 (15:00-16:30)

Groebner bases theory in sampling problems of contingency tables

This introductory lecture is about statistical theory from the point of view of the computational algebraic statistics, in particular the applications of Groebner bases. The statistical theory is a fundamental tool in natural science, social science and humanities, and the Groebner basis is a topic related to multi-variable polynomials. The Lecture will start from an introduction to the Groebner basis which would have wide applications in mathematics, physics, biology, chemistry, engineering, information science and computer science. Therefore, we welcome scientists in any field who are interested in this subject.

The event official language is Japanese (slides and writing are in English).

Venue: #535-537, 5F, Main Research Building, RIKEN

Event Official Language: Japanese

## Colloquium

### Systems Biology of Cellular Rhythms

July 2 at 15:00 - 16:30, 2018

Prof. Albert Goldbeter (Professor, Unit of Theoretical Chronobiology, Faculty of Sciences, Université Libre de Bruxelles, Belgium)

Venue: Suzuki Umetaro Hall, 1F Bioscience Building, RIKEN

Broadcast: #305-2, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University / 2F Seminar Room, AIMR Main Building, Advanced Institute for Materials Research (AIMR), Tohoku University

Event Official Language: English

## Math Lecture

### Theory of Operator Algebras (3rd)

July 12 at 15:30 - 17:00, 2018

Dr. Yosuke Kubota (Research Scientist, iTHEMS)

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

## Colloquium

### Bell's Theorem, Entanglement, Quantum Teleportation and All That

July 19 at 16:00 - 17:30, 2018

Prof. Anthony James Leggett (Professor, University of Illinois at Urbana-Champaign, USA)

iTHEMS-CEMS Joint Colloquium.

Professor Leggett is widely recognized as a world leader in the theory of low-temperature physics, and his pioneering work on superfluidity was recognized by the 2003 Nobel Prize in Physics.

Venue: Okochi Hall, 1F Laser Science Laboratory, RIKEN

Broadcast: #311, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University / 2F Seminar Room, AIMR Main Building, Advanced Institute for Materials Research (AIMR), Tohoku University

Event Official Language: English

# Person of the Week

## Self-introduction: Masaru Hongo

2018-05-28

I am Masaru Hongo, a theoretical physicist working on nonequilibrium physics. My main interest is hydrodynamics and its possible generalizations to more general nonequilibrium systems. Hydrodynamics universally describes a lot of phenomena seen in the world. Its application covers not only simple liquids in our daily life, but also the extremely high temperature plasma (the so-called quark-gluon plasma which reaches at several trillion Kelvin). Since our fluid is composed of atoms/molecules, or extremely elementary particles described by quantum theory, it is interesting to consider how we can understand the gap between two descriptions. I have studied to bridge this gap between hydrodynamics, which gives a macroscopic description of systems, and quantum field theories, which is a fundamental microscopic theory considered to be state-of-the-art atomism. Based on the recent development of non-equilibrium statistical mechanics, I have provided a solid basis for relativistic hydrodynamics. I am now working on how we can describe the more general nonequilibrium systems. I am happy if we are interacting with each other, and have fruitful collaborations!

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