Speaker
Description
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 development of increasingly sophisticated theoretical frameworks, ranging from effective Lagrangian and isobar models to coupled-channel approaches, chiral perturbation theory, Regge models, and, more recently, lattice QCD. Together, these experimental and theoretical efforts have substantially improved our understanding of the underlying reaction mechanisms and the excitation spectrum of the nucleon.
A major breakthrough came in the 1990s with the advent of second-generation facilities such as ELSA, MAMI, SPring-8, and Jefferson Lab. High-intensity, high-duty-factor accelerators, together with advanced detector systems, modern electronics, and powerful computing resources, improved experimental capabilities by orders of magnitude compared with earlier generations. These advances greatly accelerated research in strangeness physics. To date, more than 50 dedicated kaon photo- and electroproduction experiments have been performed worldwide, providing a wealth of observables that have significantly deepened our understanding of strongly interacting systems involving the creation of an $s\bar{s}$ quark pair.
The resulting data have become an indispensable complement to other approaches for studying the spectrum and internal structure of excited nucleon states, including the search for missing and exotic baryons. They have also played a key role in investigations of hypernuclear production, providing valuable constraints on the hyperon--nucleon ($YN$) interaction, as well as in studies of the electromagnetic form factors of strange mesons.
This talk presents an overview of the experimental and theoretical developments in the electromagnetic production of strangeness over the past seven decades, based on our recent review published in Ref. [1]. It traces the evolution of both experimental techniques and theoretical descriptions, highlights the major milestones and current challenges in the field, and discusses future opportunities at next-generation experimental facilities.
Reference:
- T. Mart, J. A. Djaja, D. Carman, Electromagnetic production of
on the nucleon, Progress in Particle and Nuclear Physics 150,
104252 (2026).
