Assertion: baryon's existence | /r/HasProperty | needed
Facets:
value: in this model
type: OTHER
Source sentences:
text: In 1961, after grouping the known particles, he predicted the existence of the η particle which was needed to complete a pattern.
text: Thus, the existence of the leptoquarks is necessary in this model, not only for facilitating the decay of L-R dual particle but also for producing BAU.