Over the past seventy years, studies of the electromagnetic production of strangeness have evolved from pioneering photo- and electroproduction experiments into a powerful tool for investigating hadron structure and strong interactions. Early measurements established the foundation for understanding these reactions, while the continuous accumulation of experimental data stimulated the...
We present a discussion of the mass spectrum of strange and heavy baryons in nuclear matter, based on the framework of the pion mean-field approach. We will also discuss possible applications of the approach to strangeness-mixed nuclear matter.
In recent years, there has been growing interest in exotic hadrons that exhibit structures beyond the conventional hadron picture, where baryons are treated as three-quark states ($qqq$) and mesons as quark--antiquark pairs ($q\bar{q}$). In the charm sector, many exotic hadrons such as $XYZ$, $P_c$, and $T_{cc}$ particles have been reported in experiments. Most of these states have appeared...
We develop a non-perturbative approach to heavy-quark effective theory based on the instanton-induced heavy-light effective action. The formalism incorporates spontaneous chiral symmetry breaking and heavy-quark spin symmetry from the outset and is reformulated in terms of chirally rotated constituent light quarks interacting with Goldstone bosons. Heavy-meson states emerge dynamically as...
