Seminars in academic year 2024
16:35-18:05, Friday 19th July 2024 (Building 6, Room 6106)
Wen Yin(Tokyo Metropolitan University)
The Past, Present, and Future of eV Dark Matter
With a mass of eV (about 10^6th of an electron), dark matter has one of the longest histories of dark matter. In this talk, I will explain why the existence of dark matter is evidence of a new physical law and discuss how it can be investigated now and in the future, focusing on eV dark matter.
![](https://www.google.com/images/icons/product/drive-32.png)
![](https://www.google.com/images/icons/product/drive-32.png)
16:35-18:05, Friday 28th June 2024 (Building 6, Room 6101)
Kimiko Yamashita(Ibaraki University)
Particle Physics and Dark Matter
Particle physics is the study of identifying the smallest constituents of matter and explaining the laws of physics in terms of their interactions. The four currently known forces are gravity, electromagnetic force, weak force, and strong force, and the discovery of the Higgs boson confirmed the particle standard theory describing the three forces other than gravity.
The purpose of particle physics is to explain unknown physical laws, including dark matter, etc., from the interaction of the smallest constituents of matter. In this seminar, I will introduce what particle physics and dark matter are and how they are related. I will also present excerpts from my recent work on dark matter, baryon number production, and cosmic inflation, and discuss recent approaches to high-energy theory and its relevance to particle experiments and observations.
![](https://www.google.com/images/icons/product/drive-32.png)
![](https://www.google.com/images/icons/product/drive-32.png)
16:35-18:05, Friday 14th June 2024 (Building 6, Room 6101)
Ivan Arraut(University of Saint Joseph)
Implementation of the tools of Quantum Mechanics in scenarios involving finance and economy
In this presentation I will introduce some of the most useful analogies for analyzing problems in economy and finance by using the well-known tools of Quantum Mechanics. This brings us to the scenario of Quantum Finance where certain financial equations can be expressed in a Hamiltonian/Lagrangian language.
In this way, we can derive new results by extending important concepts like spontaneous symmetry breaking, gauge symmetries, Higgs mechanism and others. We then show how this scenario helps us to unify the two most important equations, constructed for predicting the prices of Options. Finally, we explain other practical problems where the notions of Quantum Mechanics can play an important role.
![](https://www.google.com/images/icons/product/drive-32.png)
![](https://www.google.com/images/icons/product/drive-32.png)
16:35-18:05, Friday 31st May 2024 (Building 6, Room 6101)
Joe Sato(Yokohama National University)
LμーLτsymmetry
We will discuss the Lμ-Lτ symmetry as a theoretical framework to explain phenomena that cannot be explained by the Standard Model of elementary particles. The Standard Model is a well-developed framework that explains most ground-based particle experiments. However, there are still some things that remain a mystery. These include neutrino masses, the anomalous magnetic moment of muons, the spectrum of cosmic neutrinos observed by IceCube, and the phenomenon known as the Hubble tension. As a framework to solve these problems simultaneously, I will explain the model that extends the Standard Model to have Lμ-Lτ symmetry.
![](https://www.google.com/images/icons/product/drive-32.png)
![](https://www.google.com/images/icons/product/drive-32.png)
16:35-18:05, Friday 17th May 2024 (Building 6, Room 6111)
Yui Hayashi(Kyoto University)
Physics of Quarks and Gluons and Their Vacuum Structure
Protons and neutrons, the fundamental elements of matter, are composed of quarks and gluons. The physics of quarks and gluons is described by a quantum field theory model known as Quantum Chromodynamics (QCD). The theoretical understanding of QCD still harbors many fundamental mysteries, exemplified by the problem of quark confinement: "Why can quarks not be isolated and are only observed as part of protons or neutrons?" This seminar will explore the difficulties and fascinations of the low-energy physics and vacuum structure of QCD. Additionally, it will introduce recent research on the semiclassical analysis of the QCD vacuum through T^2 compactification.
![](https://www.google.com/images/icons/product/drive-32.png)
![](https://www.google.com/images/icons/product/drive-32.png)