Minimal Higher-Dimensional Extensions of the Standard Model and Electroweak Observables

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dc.creatorMück, Alexander
dc.creatorPilaftsis, Apostolos
dc.creatorRückl, Reinhold
dc.date2001-10-30
dc.date2001-11-16
dc.date.accessioned2026-07-07T10:32:56Z
dc.date.available2026-07-07T10:32:56Z
dc.descriptionWe consider minimal 5-dimensional extensions of the Standard Model compactified on an $S^1/Z_2$ orbifold, in which the SU(2)$_L$ and U(1)$_Y$ gauge fields and Higgs bosons may or may not all propagate in the fifth dimension while the observable matter is always assumed to be confined to a 4-dimensional subspace. We pay particular attention to consistently quantize the higher-dimensional models in the generalized $R_ξ$ gauge and derive analytic expressions for the mass spectrum of the resulting Kaluza-Klein states and their couplings to matter. Based on recent data from electroweak precision tests, we improve previous limits obtained in the 5-dimensional Standard Model with a common compactification radius and extend our analysis to other possible 5-dimensional Standard-Model constructions. We find that the usually derived lower bound of $\sim 4$ TeV on an universal compactification scale may be considerably relaxed to $\sim 3$ TeV in a minimal scenario, in which the SU(2)$_L$ gauge boson is the only field that feels the presence of the fifth dimension.
dc.description48 pages, LaTeX, 1 eps figure, typos corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/0110391
dc.identifierhttp://arxiv.org/abs/hep-ph/0110391
dc.identifierPhys.Rev.D65:085037,2002
dc.identifierdoi:10.1103/PhysRevD.65.085037
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178933
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMinimal Higher-Dimensional Extensions of the Standard Model and Electroweak Observables
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