sigma particle


noun Physics.

an unstable hyperon having positive, negative, or zero electric charge and strangeness −1. Symbol: Σ
Also called sigma baryon.

Origin of sigma particle

First recorded in 1960–65

Words nearby sigma particle

Scientific definitions for sigma baryon

sigma baryon

Any of three unstable subatomic particles in the baryon family, having a mass 2,328 to 2,343 times that of the electron and a positive, neutral, or negative electron charge. See Table at subatomic particle.