Towards the Non-Chiral Extension of SM and MSSM

Chkareuli, J. L.; Gogoladze, I. G.; Kobakhidze, A. B.

Towards the Non-Chiral Extension of SM and MSSM

Authors

Chkareuli, J. L.

Gogoladze, I. G.

Kobakhidze, A. B.

Description

We show that in some SU(N) type GUTs with the complementary pairs of the conjugated fermion multiplets there naturally appear the relatively light ($M\ll M_{GUT}$) vectorlike fermions which considerably modify the desert physics. In the non-SUSY case they can provide for the unification of the standard coupling constant $α_1$, $α_2$ and $α_S$ whereas in the SUSY case they can increase the unification point up to the string unification limit and decrease $α_S(M_Z)$ down to the value predicted from the low energy physics.
LaTeX, 1 figure