Discovery and Identification of W' and Z' in SU(2) x SU(2) x U(1) Models at the LHC

Abstract

We explore the discovery potential of W' and Z' boson searches for various SU(2) x SU(2) x U(1) models at the Large Hadron Collider (LHC), after taking into account the constraints from low energy precision measurements and direct searches at both the Tevatron (1.96 TeV) and the LHC (7 TeV). In such models, the W' and Z' bosons emerge after the electroweak symmetry is spontaneously broken. Two patterns of the symmetry breaking are considered in this work: one is SU(2)_L x SU(2)_2 x U(1)_X to SU(2)_L x U(1)_Y (BP-I), another is SU(2)_1 x SU(2)_2 x U(1)_Y to SU(2)_L x U(1)_Y (BP-II). Examining the single production channel of W' and Z' with their subsequent leptonic decays, we find that the probability of detecting W' and Z' bosons in the considered models at the LHC (with 14 TeV) is highly limited by the low energy precision data constraints. We show that observing Z' alone, without seeing a W', does not rule out new physics models with non-Abelian gauge extension, such as the phobic models in BP-I. Models in BP-II would predict the discovery of degenerate W' and Z' bosons at the LHC.

29 pages, including 11 figures, 3 tables, added references for introduction

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• Implications of CTEQ global analysis for collider observables
• First Limits on Left-Right Symmetry Scale from LHC Data
• Z' physics with early LHC data
• A Three Site Higgsless Model
• Search for a heavy neutral gauge boson in the dielectron channel with 5.4 fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV
• Search for the Production of Narrow tb Resonances in 1.9 fb-1 of ppbar Collisions at sqrt(s) = 1.96 TeV
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• Improved bounds on W-W' mixing with ATLAS resonant WZ production data at the LHC at $\sqrt{s}=13$ TeV
• Search for high-mass resonances in final states with a $\tau$-lepton and missing transverse momentum with the ATLAS detector
• Minimal left-right symmetric intersecting D-brane model
• Associated production of the heavy charged gauge boson $W_H$ and a top quark at LHC