Shigehiro Yasui

TL;DR: In the past decade, exotic hadrons with charm and bottom flavors have been extensively studied both in experiments and in theories as mentioned in this paper, and the authors provide topical discussions by selecting $X,Y,Z$ particles, to which Belle has made important contributions.

TL;DR: In this article, a review of properties of topological solitons in dense quantum chromodynamics (QCD) and their properties in the color-flavor-locked (CFL) phase are discussed.

TL;DR: In this article, the authors present a review of the current understanding of a selected set of exotic particle candidates that can be potentially measured in heavy ion collisions, including the production of resonances, exotics and hadronic molecular states in these collisions based on the coalescence model and the statistical model.

TL;DR: Using the coalescence model for hadron production, it is found that, compared to the case of a nonexotic hadron with normal quark numbers, the yield of an exotic hadron is typically an order of magnitude smaller when it is a compact multiquark state and a factor of 2 or more larger when it are a loosely bound hadronic molecule.

TL;DR: In this paper, various properties of topological solitons in dense QCD matter, with a particular emphasis on the CFL phase exhibiting superfluidity and superconductivity, and their phenomenological implications in terms of the effective field theories such as the Ginzburg-Landau theory, the chiral Lagrangian, or the Bogoliubov--de Gennes equation.