Minimal Grand Unification Model in an Anthropic Landscape

Details Minimal Grand Unification Model in an Anthropic Landscape Minimal Grand Unification Model in an Anthropic Landscape

2004-06-28

arxiv.org/abs/hep-ph/0406314v1

Eur.Phys.J.C41:245-249,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages

Scientific paper

10.1140/epjc/s2005-02184-2

It has been recently pointed out by Arkani-Hamed and Dimopoulos that if the universe is a landscape of vacua, and if therefore fine-tuning is not a valid guidance principle for searching for physics beyond the standard model, supersymmetric unification only requires the fermionic superpartners. We argue that in that landscape scenario, the fermionic superpartners are not needed for unification, which can be achieved in SO(10) either via a direct breaking to the standard model at the grand unification scale or through an intermediate gauge symmetry. In most minimal SO(10) models, the proton lifetime is long enough to avoid the experimental bounds. These models are the truly minimal fine-tuned extensions of the standard model in the sense proposed by Davoudiasl et al..

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