Probing the Randall-Sundrum geometric origin of flavor with lepton flavor violation
- Department of Physics, Syracuse University, Syracuse, New York 13244 (United States) and School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)
- Department of Physics, Johns Hopkins University, Baltimore, Maryland 21218 (United States)
- Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)
The anarchic Randall-Sundrum model of flavor is a low energy solution to both the electroweak hierarchy and flavor problems. Such models have a warped, compact extra dimension with the standard model fermions and gauge bosons living in the bulk, and the Higgs living on or near the TeV brane. In this paper we consider bounds on these models set by lepton flavor-violation constraints. We find that loop-induced decays of the form l{yields}l{sup '}{gamma} are ultraviolet sensitive and incalculable when the Higgs field is localized on a four-dimensional brane; this drawback does not occur when the Higgs field propagates in the full five-dimensional space-time. We find constraints at the few TeV level throughout the natural range of parameters, arising from {mu}-e conversion in the presence of nuclei, rare {mu} decays, and rare {tau} decays. A tension exists between loop-induced dipole decays such as {mu}{yields}e{gamma} and tree-level processes such as {mu}-e conversion; they have opposite dependences on the five-dimensional Yukawa couplings, making it difficult to decouple flavor-violating effects. We emphasize the importance of the future experiments MEG and PRIME. These experiments will definitively test the Randall-Sundrum geometric origin of hierarchies in the lepton sector at the TeV scale.
- OSTI ID:
- 20871088
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 5; Other Information: DOI: 10.1103/PhysRevD.74.053011; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Custodial bulk Randall-Sundrum model and B{yields}K*l{sup +}l{sup '-}
Precision Measurements and Fermion Geography in the Randall-Sundrum Model Revisited