Year: 2014
Type: preprint
Abstract: We compute the electroweak fine-tuning in No-Scale Supergravity for a representative supersymmetric Grand Unification Theory (GUT) model, flipped $SU(5)$ with extra vector-like $flippons$, dubbed $\cal{F}$-$SU(5)$. We find that there is no problematic electroweak fine-tuning in No-Scale $\cal{F}$-$SU(5)$, due to an elegant proportional rescaling of the full mass spectrum with respect to just the unified gaugino mass $M_{1/2}$, as well as a dynamic equivalence enforced between $M_{1/2}$ and the supersymmetric Higgs mixing parameter $μ$ at the heavy unification scale. We demonstrate both analytically and numerically that the No-Scale $\cal{F}$-$SU(5)$ fine-tuning parameter is consequently of unit order, $Δ_{\rm EENZ} \simeq {\cal O}(1)$, at the electroweak scale.
Source: arXiv (Cornell University)
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1948871105