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
sigla,
siglos,
sigma,
sigma baryon,
sigma factor,
sigma particle,
sigmate,
sigmatism,
sigmoid,
sigmoid artery,
sigmoid colon
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.