Probing composite Higgs boson substructure at the HL-LHC

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.…”

Diboson production in the SMEFT from gluon fusion

“…The final-state configuration of ZH/W H production that is most useful for precision differential measurements is that in which the weak gauge boson decays to charged leptons or neutrinos and the Higgs boson decays to a b-quark pair. Several studies have highlighted this process as a powerful BSM probe, in particular in the boosted Higgs regime [15,18,23,24,32,78]. However, the limited cross-section at high energies allows for a noticeable gain of sensitivity when the boosted and resolved regimes are combined, as shown in ref.…”

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].…”