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" ... An equally-symmetric collection of matter and antimatter (of X and Y, and anti-X and anti-Y) bosons ... [+] could, with the right GUT properties, give rise to the matter/antimatter asymmetry we find in our Universe today. Note that even though we classify these X and Y particles as bosons due to their spin, they couple to both quarks and leptons, and carry a net baryon+lepton number. ... "
" ... An equally-symmetric collection of matter and antimatter (of X and Y, and anti-X and anti-Y) bosons... [+] could, with the right GUT properties, give rise to the matter/antimatter asymmetry we find in our Universe today. However, we assume that there is a physical, rather than a divine, explanation for the matter-antimatter asymmetry we observe today, but we do not yet know for certain. ... "
" ... The massless W and B bosons, instead of the W+, W-, the Z, and the photon, were the electroweak... [+] bosons that existed as the force carriers back before the electroweak symmetry was broken in the early Universe. ... "