Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-01-20
Phys.Lett. B324 (1994) 412-417
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, Standard Latex (46kb). 3 figures not included, available by anonymous ftp from hal9000.elte.hu, in directory /arch/pu
Scientific paper
10.1016/0370-2693(94)90215-1
The possibility of grand unification of the standard model (SM) with fermion spectrum extended to include mirror fermions is examined. SM gauge couplings do not automatically unify. SO(10) grand unification is studied with one intermediate scale. Renormalization group equations (RGE) for fermion Yukawa couplings and the scalar self-coupling are studied numerically at one and two loop level. Strong restrictions for mirror fermion masses are obtained assuming perturbative unification. Mirror masses much smaller than the tree unitarity bounds are required. In particular mirror leptons have to be around 50 GeV. Consistency of the mirror fermion model with LEP precision data is established. A direct search for single production of mirror neutrinos at LEP could exclude or confirm the GUT version of the mirror fermion model.
Csikor Ferenc F.
Montvay Istvan
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