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Deciphering Universal Extra Dimension from the top quark signals at the CERN LHC

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arxiv 0911.4064 v3 pith:I2GRP4QN submitted 2009-11-20 hep-ph

Debajyoti Choudhury , Anindya Datta , Kirtiman Ghosh This is my paper · ORCID
classification hep-ph
keywords excitationsextraleptonsproductionquarksuniversalallowbottom
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abstract

Models based on Universal Extra Dimensions predict Kaluza-Klein (KK) excitations of all Standard Model (SM) particles. We examine the pair production of KK excitations of top- and bottom-quarks at the Large Hadron Collider. Once produced, the KK top/bottom quarks can decay to $b$-quarks, leptons and the lightest KK-particle, $\gamma_1$, resulting in 2 $b$-jets, two opposite sign leptons and missing transverse momentum, thereby mimicing top-pair production. We show that, with a proper choice of kinematic cuts, an integrated luminosity of 100 fb$^{-1}$ would allow a discovery for an inverse radius upto $R^{-1} = 750$ GeV.

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  1. Revisiting Universal Extra-Dimension Model with Gravity Mediated Decays

    hep-ph 2024-12 conditional novelty 5.0 of 10

    Existing LHC data exclude fat-brane mUED compactification scales below about 3 TeV, and ML-tagged searches at 500 fb^-1 could extend the reach to roughly 3.2 to 3.4 TeV.

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