English

5D UED: Flat and Flavorless

High Energy Physics - Phenomenology 2011-01-25 v1

Abstract

5D UED is not automatically minimally flavor violating. This is due to flavor asymmetric counter-terms required on the branes. Additionally, there are likely to be higher dimensional operators which directly contribute to flavor observables. We document a mostly unsuccessful attempt at utilizing localization in a flat extra dimension to resolve these flavor constraints while maintaining KK-parity as a good quantum number. It is unsuccessful insofar as we seem to be forced to add brane operators in such a way as to precisely mimic the effects of a double throat warped extra dimension. In the course of our efforts, we encounter and present solutions to a problem common to many extra dimensional models in which fields are "doubly localized:" ultra-light modes. Under scrutiny, this issue seems tied to an intrinsic tension between maintaining Kaluza-Klein parity and resolving mass hierarchies via localization.

Keywords

Cite

@article{arxiv.1007.0025,
  title  = {5D UED: Flat and Flavorless},
  author = {Csaba Csáki and Johannes Heinonen and Jay Hubisz and Seong Chan Park and Jing Shu},
  journal= {arXiv preprint arXiv:1007.0025},
  year   = {2011}
}

Comments

27 pages, 6 figures

R2 v1 2026-06-21T15:43:12.229Z