5D UED: Flat and flavorless

Csaba Csáki, Johannes Heinonen, Jay Hubisz, Seong Chan Park, Jing Shu

Research output: Contribution to journalArticle

12 Citations (Scopus)


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.

Original languageEnglish
Article number89
JournalJournal of High Energy Physics
Issue number1
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Csáki, C., Heinonen, J., Hubisz, J., Park, S. C., & Shu, J. (2011). 5D UED: Flat and flavorless. Journal of High Energy Physics, 2011(1), [89]. https://doi.org/10.1007/JHEP01(2011)089