Originally, name for elementary particlesElementary particles refer to particles that cannot be easil... with a mass between the muonElectrically charged instable elementary particle with a res... mass and the nucleonGroup name for protons and neutrons. mass. The group of mesons now include the elementary particlesElementary particles refer to particles that cannot be easil... which, like the baryons are subject to both strong and weak and electromagnetic interactionInfluence of a physical body on another body or the coupling..., but in contrast to the baryons, with a spinSpin is a characteristic property of elementary particles. equal to zero. For example pions and K-mesons belong to the mesons. elementary particlesElementary particles refer to particles that cannot be easil...