5D UED: Flat and flavorless

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

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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 (US)
Article number89
JournalJournal of High Energy Physics
Issue number1
StatePublished - 2011


  • Phenomenology of field theories in higher dimensions
  • Phenomenology of large extra dimensions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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