Robustness and Predictivity of 4 TeV Unification

Details Robustness and Predictivity of 4 TeV Unification Robustness and Predictivity of 4 TeV Unification

2003-02-11

arxiv.org/abs/hep-ph/0302074v3

Phys.Lett. B570 (2003) 67-72

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages LaTeX including 7 eps figures. New discussion of threshold effects with four new figures

Scientific paper

10.1016/j.physletb.2003.07.024

The stability of the predictions of two of the standard model parameters, $\alpha_3(M_Z)$ and $\sin^2 \theta(M_Z)$, in a $M_U \sim 4$ TeV unification model is examined. It is concluded that varying the unification scale between $M_U \simeq 2.5$ TeV and $M_U \simeq 5$ TeV leaves robust all predictions within reasonable bounds. Choosing $M_U = 3.8 \pm 0.4$ TeV gives, at lowest order, accurate predictions at $M_Z$. The impact of threshold effects on unification depends on the spectrum of states beyond the standard model.

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