Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-05-31
Phys.Rev. D67 (2003) 045019
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 12 figures; more explanation of nonuniversal gauge couplings added, typos corrected, references updated
Scientific paper
10.1103/PhysRevD.67.045019
We present four-dimensional gauge theories that describe physics on five-dimensional curved (warped) backgrounds, which includes bulk fields with various spins (vectors, spinors, and scalars). Field theory on the AdS$_5$ geometry is examined as a simple example of our formulation. Various properties of bulk fields on this background, e.g., the mass spectrum and field localization behavior, can be achieved within a fully four-dimensional framework. Moreover, that gives a localization mechanism for massless vector fields. We also consider supersymmetric cases, and show in particular that the conditions on bulk masses imposed by supersymmetry on warped backgrounds are derived from a four-dimensional supersymmetric theory on the flat background. As a phenomenological application, models are shown to generate hierarchical Yukawa couplings. Finally, we discuss possible underlying mechanisms which dynamically realize the required couplings to generate curved geometries.
Abe Hiroyuki
Kobayashi Tatsuo
Maru Nobuhito
Yoshioka Koichi
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