Polychromatic Grand Unification

الأصل · EN

The possibility of achieving a gauge coupling grand unification by increasing the QCD degrees of freedom at higher energies is investigated. When confronted with precision low-energy data, the generic weak-mixing angle relation sin²(thetaW) = N/2(N+1) requires N=7 colors at the GUT scale Mᵤ 10¹7 GeV. With the exclusive addition of light Higgs doublets to the standard model particle content, such a unification may also occur if N=5 at Mᵤ 10¹6 GeV.