leptoquark boson

leptoquark boson

[′lep·tō‚kwärk ′bō‚sän]
(particle physics)
A charged-vector gauge boson postulated in grand unified theories of color and electroweak forces, with a mass of the order of 1015GeV, that can change quarks to leptons or quarks to antiquarks, and is responsible for proton decay.