TeV resonances in top physics at the LHC

Abstract

We consider the possibility of studying novel particles at the TeV scale with enhanced couplings to the top quark via top quark pair production at the LHC and VLHC. In particular we discuss the case of neutral scalar and vector resonances associated with a strongly interacting electroweak symmetry breaking sector. We constrain the couplings of these resonances by imposing appropriate partial wave unitarity conditions and known low energy constraints. We evaluate the new physics signals via WW -> tt~ for various models without making approximation for the initial state W bosons, and optimize the acceptance cuts for the signal observation. We conclude that QCD backgrounds overwhelm the signals in both the LHC and a 200 TeV VLHC, making it impossible to study this type of physics in the tt~ channel at those machines.

15p, add. comments to clarify model, +2 ref., version to appear PRD

References in corpus (23)

• Strong Dynamics and Electroweak Symmetry Breaking
• Topcolor Assisted Technicolor
• Top Quark Seesaw Theory of Electroweak Symmetry Breaking
• Electroweak Symmetry Breaking via Top Condensation Seesaw
• Top Production: Sensitivity to New Physics
• The Strongly Interacting $WW$ System: Gold--Plated Modes
• Natural Topcolor--Assisted Technicolor
• Single-Top-Quark Production via W-Gluon Fusion at Next-to-Leading Order
• Observing H -> W*W* -> e mu pT(miss) in weak boson fusion with dual forward jet tagging at the LHC
• LHC Analysis of the Strongly Interacting $WW$ System: Gold-Plated Modes
• How Can a Heavy Higgs Boson be Consistent with the Precision Electroweak Measurements?
• Electroweak Data and the Higgs Boson Mass: A Case for New Physics
• The Z ->anti-b b decay asymmetry: lose-lose for the Standard Model
• Effective Field Theory of Anomalous Gauge-Boson Couplings at High-Energy pp Colliders
• The Higgs Boson Lineshape and Perturbative Unitarity
• Flavour Universal Dynamical Electroweak Symmetry Breaking
• Limits on a Composite Higgs Boson
• Top Quark Interactions and the Search for New Physics
• Tests for a Strong Electroweak Sector at Future e^+e^- High Energy Colliders
• Anomalous W^+ W^- t {\bar t} Couplings at the e^+ e^- Linear Collider
• Theory of a Strongly Interacting Electroweak Symmetry Breaking Sector
• Top-quark couplings to TeV resonances at future lepton colliders
• Strongly-Interacting Electroweak Sector --Model Independent Approaches--

Cited by in corpus (14)

• Strong Dynamics and Electroweak Symmetry Breaking
• The "Top Priority" at the LHC
• FCNC production of same sign Top quark pairs at the LHC
• A "composite" scalar-vector system at the LHC
• Hadron Collider Signatures for New Interactions of Top and Bottom Quarks
• Unitarity constraints on top quark signatures of Higgsless models
• Top quark effects in composite vector pair production at the LHC
• Improved analysis of the bounds from the electroweak precision tests on the 4-site model
• LHC constraints on $W^{\prime },Z^{\prime }$ that couple mainly to third generation fermions
• One-loop Electroweak and QCD corrections to vector boson scattering into top pairs and application to ILC
• Top-BESS model and its phenomenology
• Study of V_LV_L to t tbar at the ILC Including O(alpha_s) QCD Corrections
• A case study about the mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation
• Study of V_LV_L\to t\bar{t} at the ILC Including O(alpha_s) QCD Corrections