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In the extra U(1) superstring inspired model, we examine the electroweak andU(1)-prime symmetry breaking with the singlet and exotic quark D, D+{\c}alongwith the study of heavy Z-prime boson in accordance with the top quark massregion. For this, we have done the analysis of complete renormalization groupequations (RGEs)pertaining to the anomaly free E-{\6}-Eta model of rank 5. TheZ-prime is found to the order of TeV or above with allowed small Z-Zprimemixing angle, for which the large singlet VEV is required. This is done byconsidering the only non-universality of Yukawa couplings at GUT scale becausethese do not obey the E-{\6}relationship and also satisfies the unitarityconstraints both at GUT and weak scale, where rest of the parameters, i.e.,gaugino masses, tri-linear couplings, and soft supersymmetric breaking massesare kept universal at GUT scale with the gauge couplings unification. The largevalue of Yukawa couplings (order of 1) triggered the symmetry breakingradiatively and induces the effective-Mu parameter at the electroweak scale andlead to a viable low energy spectrum at weak scale.

Signatures of Heavy Z-prime in the Extra U(1) Superstring Inspired Model: RGEs Analysis