Conveners
2; Tue-II
- Satoshi N. Nakamura (The University of Tokyo)
In non-central heavy-ion collisions (HIC), the large initial angular momentum can induce a non-vanishing polarization for hadrons with non-zero spin. The global spin alignment of vector mesons, quantified by the $00^{th}$ element of spin density matrix $(\rho_{00})$, can offer information on the spin-orbital interactions of the QCD medium. Surprisingly large signal of vector meson ρ00 compared...
The matter created in non-central heavy-ion collisions is expected to have an initial orbital angular momentum carried by two colliding nuclei. Such an angular momentum would be transferred to the global polarization due to the spin-orbit coupling. The STAR Collaboration observed global polarization of \Lambda hyperons in Au+Au collisions in a wide range of collision energy $\sqrt{s_{NN}}$ =...
We’ll discuss our recent progress on studying light hypernuclei by using heavy ion beams, nuclear emulsions and machine learning techniques. In recent years, hypernuclear studies can also be performed by using energetic heavy ion beams, and some of these experiments have revealed unexpected results on three-body hypernuclear states, i.e., shorter lifetime [1-7] and larger binding energy [8] of...
Scattering experiments involving a hyperon and a proton are the most effective methods for investigating two-body hyperon–nucleon ($YN$) interactions, as is the case in various intensive studies on $pp$ and $np$ scattering, which are aimed at understanding nucleon–nucleon ($NN$) interactions. Scattering observables, such as differential cross sections and spin observables, are essential...
A large amount of data collected over the past several decades allowed a detailed understanding of the nucleon-nucleon (NN) interaction. On the other hand, experimental difficulties prevent us from obtaining a comprehensive understanding of interactions involving other members of the baryon octet -- namely the hyperons (Y). Such difficulties are associated with the short lifetime of hyperons,...
