Definition of sparticle in US English:



  • A hypothetical subatomic particle predicted by supersymmetry, which is the boson equivalent of a known fermion.

    ‘every baryonic particle should have a supersymmetric twin: a sparticle’
    • ‘The reason physicists haven't yet observed sparticles might be because they are so much heavier than their normal sister particles, so they decay far too quickly.’
    • ‘"These are called sparticles - super particles - which make up, we think, dark matter, which in turn makes up 10 times more matter than ordinary matter."’
    • ‘Should these "sparticles" exist, perhaps they might explain the existence of dark matter that we know pervades the entire Universe, but have little idea what it is.’
    • ‘Top among all of these theories was always supersymmetry, the idea that every known elementary particle has one or more heavier partners, known as sparticles.’


1990s: from s, representing superpartner, + particle.