Standard Model Couplings with $α^{-1}=137 \pm 9$ from Multiple Point Criticality and 3 Generations of Gauge Bosons: No GUT, No SUSY

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dc.creatorBennett, D. L.
dc.creatorFroggatt, C. D.
dc.creatorNielsen, H. B.
dc.date1997-07-03
dc.date.accessioned2026-07-07T04:02:02Z
dc.date.available2026-07-07T04:02:02Z
dc.descriptionWe consider the application of the Multiple Point Criticality Principle to the Standard Model and its extension to the anti-grand gauge group $SMG^3 \otimes U(1)_f$ at the Planck scale. In particular we discuss the predictions for the fine structure constants: $α^{-1}(0) = 137 \pm 9$, $α^{-1}_{1}(M_Z) =99 \pm 5$, $α^{-1}_{2}(M_Z) =29 \pm 6$, $α^{-1}_{3}(M_Z) =12 \pm 6$. We also present our Standard Model predictions for the top quark and Higgs masses and a $SMG^3 \otimes U(1)_f$ fit of the quark-lepton masses and mixing angles. We characterise $SMG^3 \otimes U(1)_f$ as the largest possible extension of the Standard Model gauge group satisfying some relatively simple assumptions. The resolution of some other fine-tuning problems ($Λ_{cosmological}$, $Θ_{QCD}$, $M_{Higgs}$) by the multiple point requirement of degenerate vacua is briefly discussed.
dc.descriptionuuencoded 4 page LaTeX file, uses stwol.sty; published in Proceedings of 28th International Conference on High Energy Physics (ICHEP 96), Warsaw: 1646-1649
dc.identifierhttps://arxiv.org/abs/hep-ph/9707234
dc.identifierhttp://arxiv.org/abs/hep-ph/9707234
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/47067
dc.subjectHigh Energy Physics - Phenomenology
dc.titleStandard Model Couplings with $α^{-1}=137 \pm 9$ from Multiple Point Criticality and 3 Generations of Gauge Bosons: No GUT, No SUSY
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