Either of two baryons that contain two strange quarks and have a neutral or negative charge, masses of 2,573 and 2,586 times that of the electron, and mean lifetimes of 2.9 × 10−10 and 1.6 × 10−10 second, respectively. Also called cascade baryon .
Xi baryon. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/xi-baryon
Either of two subatomic particles in the baryon family, one neutral and one negatively charged, with masses of 2,572 and 2,585 times that of the electron and average lifetimes of 2.9 × 10-10 and 1.6 × 10-10 seconds.