Constraints on models with universal extra dimensions from dilepton searches at the LHC
Abstract
Models with universal extra dimensions predict that each Standard Model particle is accompanied by a tower of Kaluza-Klein resonances. Canonical searches for the production and cascade decays of first Kaluza-Klein modes through missing transverse momentum signatures suffer in general from low detection efficiencies because of the rather compressed Kaluza-Klein particle mass spectrum. Here, instead we analyze signatures from the production of second Kaluza-Klein states which can decay into Standard Model particles and thus do not result in any missing transverse momentum. Such signatures provide a strong sensitivity, and are of particular interest as they would allow for a clear distinction between extra dimension models and other models of new physics like supersymmetry. We constrain the production of second Kaluza-Klein particles from recent LHC searches for dilepton resonances, and place limits on the compactification scale to be larger than 715GeV, and on the masses of the second Kaluza-Klein particles to be larger than 1.4TeV.
Keywords
Cite
@article{arxiv.1302.6076,
title = {Constraints on models with universal extra dimensions from dilepton searches at the LHC},
author = {Lisa Edelhäuser and Thomas Flacke and Michael Krämer},
journal= {arXiv preprint arXiv:1302.6076},
year = {2015}
}
Comments
11 pages, 4 figures, analysis updated (inclusion of data from CMS-PAS-EXO-12-061), MUED bound improved to R^{-1} > 715 GeV, version published in JHEP