Direct collider signatures of large extra dimensions

TL;DR

This paper investigates how large extra dimensions could produce detectable collider signatures through Kaluza-Klein excitations of gauge bosons, offering a way to test theories of TeV-scale strings.

Contribution

It analyzes direct collider signatures of Kaluza-Klein modes of gauge bosons in large extra dimension models, including predictions for current and future collider experiments.

Findings

LEPII, NLC, and Tevatron set bounds on KK mode masses

LHC can produce on-shell KK resonances

Characteristic dilepton mass distribution patterns at LHC

Abstract

The realization of low (TeV) scale strings usually requires the existence of large (TeV) extra dimensions where gauge bosons live. The direct production of Kaluza-Klein excitations of the photon and Z-boson at present and future colliders is studied in this work. At the LEPII, NLC and Tevatron colliders, these Kaluza-Klein modes lead to deviations from the standard model cross-sections, which provide lower bounds on their mass. At the LHC the corresponding resonances can be produced and decay on-shell, triggering a characteristic pattern in the distribution of the dilepton invariant mass.