Exploring two Universal Extra Dimensions at the CERN LHC

TL;DR

This paper investigates the signatures of two universal extra dimensions at the LHC, focusing on cascade decays of KK particles leading to jets, photons, and missing energy, and explores parameter determination methods.

Contribution

It introduces specific LHC signatures for the 2UED model and proposes kinematic cuts and correlations to determine model parameters.

Findings

Identification of a distinctive jet, photon, and missing energy signature.

Development of kinematic cuts to improve signal detection.

Correlation between M_eff peak and model parameters R and M_s.

Abstract

We discuss the signatures, at the LHC, of the (1,0)-th Kaluza-Klein (KK) gluon and quarks in the framework of the two universal extra dimensional (2UED) model. Once produced, these particles typically suffer a cascade of decays terminating in the Dark Matter candidate apart from Standard Model particles. In this article, we are interested in focus on a particular signature of 2UED wherein the final state comprises of at least four jets in association with a hard photon and missing transverse energy. Several kinematic cuts are devised to enhance the signal to background ratio. Finally, as a road map to parameter determination at the LHC, we point out an interesting correlation between the peak position of the M_eff distributions with the compactification radius R and the cut-off scale M_s.