Low-Energy Signatures of Semi-perturbative Unification

Journal article

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.

Authors: Kolda, C; March-Russell, J

• Journal: Phys.Rev. D
• Volume: 55
• Issue: 7
• Pages: 4252-4261
• Publication date: 1996-09-25
• DOI: 10.1103/PhysRevD.55.4252
• EISSN: 1089-4918
• ISSN: 0556-2821
• Language: English
• Keywords: hep-ph