Speaker
Description
The behavior of kaons and anti-kaons in dense matter is an important topic in nuclear and particle physics, as their properties are closely related to the mechanism of symmetry breaking in low-energy QCD. $\overline{K}NN$ has attracted significant attention as the simplest kaonic nucleus.
In this presentation, I will report on our study of the $\overline{K}NN$ bound state in photoproduction. Our experiment utilizes high-energy (1.5–2.4 GeV), high-intensity $\gamma$ beams, and a solenoid spectrometer capable of covering large angular ranges. An important feature of this study is the simultaneous measurement of proton and hyperon emitted at large angles over a wide kinematic coverage. As a result, this study provides valuable insight into the production process of the ""$K^-pp$"" bound state. The concentration of events shows up below the $K^-pp$ threshold in the $\gamma d \rightarrow K^0 \Lambda p$ reaction. I will discuss its origin.
