A "composite" scalar-vector system at the LHC

Abstract

In the framework of a strong dynamics for Electro-Weak Symmetry Breaking (EWSB), both vector and scalar degrees of freedom have been studied in the literature within an effective Lagrangian approach. Here we consider the case in which both a scalar, $h$, and a vector, $V$ - respectively an iso-singlet and an iso-triplet under a custodial SU(2) - are relevant with a mass below the cut-off $\Lambda \approx 4\pi v$. We study the amplitudes for the processes $W_L{W}_L\to W_L{W}_L,hh,V_L{V}_L,V_{L}h$. Requiring unitarity for the elastic channel $W_L{W}_L\to W_L{W}_L$ we can reduce the parameter space to two free parameters for given masses of the heavy vector and the scalar. We study the numerical total cross sections for the associated productions $pp\to Vhjj$ by Vector Boson Fusion (VBF) and $pp\to Vh$ by Drell-Yan (DY) annihilation as functions of these free parameters. The expected rates of same-sign di-lepton and tri-lepton events from the decay of the $Vh$ final state are also given.

23 pages, 9 tables, 2 figure. Updated to the published version. Corrected some typos

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• The Effect of Composite Resonances on Higgs decay into two photons
• Top quark effects in composite vector pair production at the LHC
• Unitarity in composite Higgs approaches with vector resonances
• The vector resonance triplet with the direct coupling to the third quark generation
• Constraints on vector resonances from a strong Higgs sector
• Composite Vectors and Scalars in Theories of Electroweak Symmetry Breaking
• Higgs Decays in Gauge Extensions of the Standard Model
• Custodial Vector Model
• Associated scalar-vector production at the LHC within an effective Lagrangian approach
• Derivative interactions and perturbative UV contributions in N Higgs Doublet Models
• A case study about the mass exclusion limits for the BSM vector resonances with the direct couplings to the third quark generation
• Composite Resonances effects on EWPT and Higgs diphoton decay rate
• Higgs boson coupling to a new strongly interacting sector
• The limits on the strong Higgs sector parameters in the presence of new vector resonances
• A Simplified Model of Heavy Vector Singlets for the LHC and Future Colliders
• An isosinglet W' at the LHC: updated bounds from direct searches