2002/11/30 by Hooman Davoudiasl, H. Davoudiasl, J. L. Hewett +3 · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Cosmology and Gravitation Theories #Curvature #Fermion #Geometry #Gravitation #Graviton #Mathematical physics #Mathematics #Noncommutative and Quantum Gravity Theories #Particle physics #Phenomenology (philosophy) #Philosophy #Physics #Quantum mechanics #Randall–Sundrum model #Spacetime #Theoretical physics #hep-ex #hep-ph #hep-th
paper · pdf · doi:10.1088/1126-6708/2003/04/001
published as JHEP 0304:001,2003 · 30 pages, 8 figures. Small corrections included to agree with published version
openalex publication_date 2003/04/01 · arxiv created 2003/04/15 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the phenomenology resulting from backgrounds of the form AdS5 × \cal Mδ, where \cal Mδ denotes a generic manifold of dimension δ≥ 1, and AdS5 is the slice of 5-dimensional anti-de Sitter space which generates the hierarchy in the Randall-Sundrum (RS) model. The δ additional dimensions may be required when the RS model is embedded into a more fundamental theory. We analyze two classes of δ-dimensional manifolds: flat and curved geometries. In the first case, the additional flat dimensions may accommodate localized fermions which in turn could resolve issues, such as proton decay and flavor, that were not addressed in the original RS proposal. In the latter case, the positive curvature of an Sδ manifold with δ> 1 can geometrically provide the 5-dimensional warping of the RS model. We demonstrate the key features of these two classes of models by presenting the background solutions, the spectra of the Kaluza-Klein (KK) gravitons, and their 4-dimensional couplings, for the sample manifolds S1/Z2, S1, and S2. The resulting phenomenology is distinct from that of the original RS scenario due to the appearance of a multitude of new KK graviton states at the weak scale with couplings that are predicted to be measurably non-universal within the KK tower. In addition, in the case of flat compactifications, fermion localization can result in KK graviton and gauge field flavor changing interactions.