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We study the collider phenomenology of non minimal universal extradimensional (nmUED) model in the context of the Large Hadron Collider at CERN.nmUED is an incarnation of the Standard Model in $(4+1)$ space-time dimensionscompactified on an $\bf{S_1}/\bf{Z_2}$ orbifold supplemented with boundarylocalized operators with unknown coefficients. These coefficients parametrizethe radiative corrections which are somehow arbitrary due to the lack ofknowledge of the cut-off scale of such effective theory. It is possible to tunethe masses and couplings of the Kaluza Klein (KK) excitations by tuning theseparameters. Two scenarios with different mass hierarchies among theKK-excitations have been considered. A detailed study of productioncross-sections and different decay modes of KK-particles are also presented. Wecalculate the correlated bounds on masses of KK-particles using the LHC $nl +mj + E\!\!\!\!/_T$ data (in case of production of strongly interactingparticles) and $3l + E\!\!\!\!/_T$ data (in case of electroweak productions).We work in a KK-parity conserving scenario where the lightest KK-particle is apotential dark (DM) matter candidate. We use the additional constraints comingfrom the observed DM relic density of the universe to identify the allowedparameter space. The current status of a nmUED model in the light of DM directdetection data is also examined. The present investigation reveals thatproduction and subsequent leptonic decays of KK-electroweak gauge bosons asmassive as 1 TeV, lead to observable trilepton signature with a luminosity of 1ab$^{-1}$ which will be realized in near future.

Exploring non minimal Universal Extra Dimensional Model at the LHC