Top quark effects in composite vector pair production at the LHC

Abstract

In the context of a strongly coupled Electroweak Symmetry Breaking, composite light scalar singlet and composite triplet of heavy vectors may arise from an unspecified strong dynamics and the interactions among themselves and with the Standard Model gauge bosons and fermions can be described by a $SU(2{)}_L\times SU(2{)}_R/SU(2{)}_{L+R}$ Effective Chiral Lagrangian. In this framework, the production of the $V^{+}{V}^{-}$ and $V^0{V}^0$ final states at the LHC by gluon fusion mechanism is studied in the region of parameter space consistent with the unitarity constraints in the elastic channel of longitudinal gauge boson scattering and in the inelastic scattering of two longitudinal Standard Model gauge bosons into Standard Model fermions pairs. The expected rates of same-sign di-lepton and tri-lepton events from the decay of the $V^0{V}^0$ final state are computed and their corresponding backgrounds are estimated. It is of remarkable relevance that the $V^0{V}^0$ final state can only be produced at the LHC via gluon fusion mechanism since this state is absent in the Drell-Yan process. It is also found that the $V^{+}{V}^{-}$ final state production cross section via gluon fusion mechanism is comparable with the $V^{+}{V}^{-}$ Drell-Yan production cross section. The comparison of the $V^0{V}^0$ and $V^{+}{V}^{-}$ total cross sections will be crucial for distinguishing the different models since the vector pair production is sensitive to many couplings. This will also be useful to determine if the heavy vectors are only composite vectors or are gauge vectors of a spontaneously broken gauge symmetry.

18 pages, 5 tables, 6 figures. Missing figures added. Matches published version

References in corpus (16)

• Tasi 2009 lectures: The Higgs as a Composite Nambu-Goldstone Boson
• Technicolor Walks at the LHC
• LHC Signatures of New Gauge Bosons in the Minimal Higgsless Model
• Discovering Technicolor
• Electroweak Symmetry Breaking from a Holographic Fourth Generation
• A weakly constrained W' at the early LHC
• Heavy Vectors in Higgs-less models
• Describing viable technicolor scenarios
• Drell-Yan production at the LHC in a four site Higgsless model
• Introduction to Electroweak Symmetry Breaking
• Benchmarks for new strong interactions at the LHC
• General Sum Rules for WW Scattering in Higgsless Models: Equivalence Theorem and Deconstruction Identities
• Quark masses and mixings in the RS1 model with a condensing 4th generation
• Drell-Yan production of Heavy Vectors in Higgsless models
• Composite Vectors and Scalars in Theories of Electroweak Symmetry Breaking
• Signals of composite particles at the LHC

Cited by in corpus (7)

• Heavy Vector Triplets: Bridging Theory and Data
• The Effect of Composite Resonances on Higgs decay into two photons
• Constraints on vector resonances from a strong Higgs sector
• Composite Vectors and Scalars in Theories of Electroweak Symmetry Breaking
• Composite Resonances effects on EWPT and Higgs diphoton decay rate
• Higgs boson coupling to a new strongly interacting sector
• A Simplified Model of Heavy Vector Singlets for the LHC and Future Colliders