Low-Energy Signatures of Semi-perturbative Unification

Details Low-Energy Signatures of Semi-perturbative Unification Low-Energy Signatures of Semi-perturbative Unification

1996-09-25

arxiv.org/abs/hep-ph/9609480v1

Phys.Rev. D55 (1997) 4252-4261

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages in LaTeX with 4 embedded figures

Scientific paper

10.1103/PhysRevD.55.4252

We consider the low-energy signatures of, and high-energy motivations for, scenarios of semi-perturbative gauge coupling unification. Such scenarios can leave striking imprints on the low-energy sparticle spectrum, including novel gaugino mass ratios (including $M_2/M_1\approx1$), substantial compression of the intra-generational squark-to-slepton mass ratios, and an overall lifting of scalar masses relative to the gauginos. We also demonstrate that the unification scale can be raised to $M_X \approx 4\times10^{17}$ GeV while still in the perturbative regime -- close to the 1-loop heterotic string scale. We employ a 3-loop calculation of the running of the gauge couplings as a test of the perturbativity of the high-scale theory.

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