New W-prime signals at the LHC

Abstract

We study the $W^{{}^{\prime }}$ phenomenology in composite Higgs/ warped extra dimensional models focusing on the effect of fermionic resonances at $\sim$1 TeV. After deriving the existing bounds from the current LHC-8 analyses, we highlight the most promising signatures for $W^{{}^{\prime }}$ discovery at the 14 TeV LHC. We find in particular very promising the study of $W^{{}^{\prime }}$ decay modes into vector-like top partners, specifically the decay into a doublet of custodian heavy fermions, $T_{5/3}{T}_{2/3}$, and the decay into a heavy fermion plus a Standard Model quark. We perform a detailed parton level analysis of the channel $W^{{}^{\prime }}\to T_{5/3}{T}_{2/3}$ in the same-sign dilepton final state, finding that it is a very promising signature to test the region at high $W^{{}^{\prime }}$ mass, $m_{W^{{}^{\prime }}}\gtrsim 2$ TeV, and of the $W^{{}^{\prime }}\to Tb$ mode, that is one of the best channels to test the intermediate $W^{{}^{\prime }}$ mass region and that, already with the LHC-8 data, could extend the present exclusion bounds.

25 pp. v2: minor changes, references added, version to appear in Phys. Rev. D

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Cited by in corpus (7)

• Review of searches for vector-like quarks, vector-like leptons, and heavy neutral leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the CMS experiment
• Distinguishing Di-jet Resonances at the LHC
• Z-peaked excess from heavy gluon decays to vector-like quarks
• Vector-like quarks: status and new directions at the LHC
• Charged resonances and Minimal Dark Matter bound states at a multi-TeV muon collider
• Photon Cascade Decay of the Warped Graviton at LHC14 and a 100 TeV Hadron Collider
• Search for W' bosons decaying to a top and a bottom quark in leptonic final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV