Modelling top partner-vector resonance phenomenology

Abstract

We have analysed the observable consequences of the interactions of spin-1 resonances coupled to the invariant fermionic currents that arise in an SO(5) Composite Higgs set-up. The phenomenology entailed by such interactions is thoroughly analysed by studying heavy vector resonances production and decay modes in the viable resonance mass range. Additionally, the production of double and single-composite fermion final states has been scanned along the fermion mass scale. Such production is mediated by the SM gauge and Higgs interactions, and also by charged and neutral vector resonances. The coupling between the new fermions and vector resonances induces a sizeable effect in the production rates. We use the recent 13 TeV LHC searches for vector-like quarks to constrain our parameter space. Specifically, we explore the allowed regions by analysing the decays of a heavy vector-like quark in the W bchannel. We conclude that generically the impact of the couplings between the spin-1 and spin-1/2 resonances will substantially reduce the permitted regions, leading us to test the sensitivity of the parametric dependence in the light of exotic matter interactions.

Phenomenological aspects of composite Higgs scenarios: exotic scalars and vector-like quarks

“…First, the pNGB nature of the Higgs boson implies modifications of its couplings with the other SM particles [33][34][35][36][37]. The other kind of signature involves additional particles beyond the SM (BSM), predicted by these models, for example, exotic EW pNGBs [23,[38][39][40], colored pNGBs [39,41], VLQs [42][43][44][45][46][47][48] and other colored fermionic states in non-triplet irreps [49], vector resonances [50][51][52][53][54], and axion-like particles [55,56]. In this contribution we focus on EW pNGBs and exotic decay modes of VLQs.…”

Colorful imprints of heavy states in the electroweak effective theory

“…Nevertheless, a broad class of these models can be described by the electroweak resonance theory and the EWET, as we outline below. Subsets of resonance states have been analyzed previously in the context of CHMs [99,104,[107][108][109][110][111], as well as compositeness of the electroweak gauge bosons [106]. There are also lattice studies [112][113][114][115][116] that bring a deeper understanding on this type of scenarios.…”

TF08 Snowmass Report: BSM Model Building

“…First, the pNGB nature of the Higgs boson implies modifications of its couplings with the other SM particles [62][63][64][65][66]. The other kind of signature involves additional particles beyond the SM, predicted by these models, for example, exotic electroweak pNGBs [67][68][69][70], colored pNGBs [69,71], vector-like quarks [72][73][74][75][76][77][78] and other colored fermionic states in non-triplet irreps [79], vector resonances [80][81][82][83][84], and axion-like particles [85,86].…”