Robustness and Predictivity of 4 TeV Unification

Paul H. Frampton; Ryan M. Rohm; Tomo Takahashi

doi:10.1016/j.physletb.2003.07.024

paper

Robustness and Predictivity of 4 TeV Unification

arXiv:hep-ph/0302074 · doi:10.1016/j.physletb.2003.07.024

Abstract

The stability of the predictions of two of the standard model parameters, $α_{3} (M_{Z})$ and $sin^{2} θ (M_{Z})$ , in a $M_{U} \sim 4$ TeV unification model is examined. It is concluded that varying the unification scale between $M_{U} ≃ 2.5$ TeV and $M_{U} ≃ 5$ 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.

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

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Strong-Electroweak Unification at About 4 TeV

Robustness and Predictivity of 4 TeV Unification

Abstract

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