Discriminating large extra dimensions at the ILC with polarized beams

Abstract

Non-standard scenarios described by effective interactions can manifest themselves indirectly, via corrections to the Standard Model cross sections. It should be desirable to identify at a given confidence level the source of such deviations among the different possible explanations. We here discuss the identification reach on gravity in extra dimensions from the four-fermion compositeness-inspired contact interactions and viceversa, using as basic observable the differential cross section of $e^{+}{e}^{-}\to \bar{f}f$ at the ILC, and emphasize the role of beams polarization in enhancing the identification sensitivity.

Comments: 4 pages, 4 figures, uses revtex4.cls 10pt.rtx slac_one.rtx and revsymb.sty, Presented at 2005 International Linear Collider Physics and Detector Workshop and 2nd ILC Accelerator Workshop, Snowmass, Colorado, 14-27 Aug 2005