Implications of results from the CERNe+e−collider LEP for SO(10) grand unification with two intermediate stages
Physical Review D, Particles and fields
We consider the breaking of the grand unification group SO(10) to the standard model gauge group through several chains containing two intermediate stages. Using the values of the gauge coupling constants at scale M_Z derived from recent LEP data, we determine the range of their intermediate and unification scales. In particular, we identify those chains that permit new gauge structure at relatively low energy (∼ 1 TeV).