Measuring the shape of the extra dimension

Ian Low*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


We study the possibility of extracting geometric information on the shape of the extra dimension from four-dimensional data such as the mass of the Kaluza-Klein (KK) mode. Assuming one compact extra dimension whose geometry can be considered as perturbations in the flat background, we show that if there is a Z2 symmetry in the extra dimension, for example the KK parity in models with Universal Extra Dimensions, then the warp factor in the metric is completely determined by the KK mass alone. Without KK parity, additional information depending on the boundary conditions is needed to fully reconstruct the metric, even though such information may be experimentally challenging to obtain. The case in a general background geometry is also considered.

Original languageEnglish (US)
Article number054
JournalJournal of High Energy Physics
Issue number10
StatePublished - Oct 1 2006


  • Beyond Standard Model
  • Large Extra Dimensions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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