Phys. Rev. Lett. 126, 062501 (2021) – Observation of Coulomb-Assisted Nuclear Bound State of ${\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}–^{14}\mathrm{N}$ System

Particle physicists have detected a short-lived nucleus containing two strange quarks, whose properties could provide new insights into the behavior of other nuclear particles.
— Read on journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.062501