Phenomenology of unusual top partners in composite Higgs models

Abstract

We consider a particular composite Higgs model which contains SU(3) color octet top partners besides the usually considered triplet representations. Moreover, color singlet top partners are present as well which can in principle serve as dark matter candidates. We investigate the LHC phenomenology of these unusual top partners. Some of these states could be confused with gluinos predicted in supersymmetric models at first glance.

Exploring extended Higgs sectors via pair production at the LHC

“…We conclude the introduction by recalling that the singlet pNGB in the minimal case SU(4)/Sp(4) is very hard to detect due to the small gauge couplings [22,43], unless it is lighter than the Z boson [44]. Finally, we recall that models with top partial compositeness also contain QCD-coloured pNGBs [40,[45][46][47] and a ubiquitous, and potentially light, singlet associated with a global U(1) symmetry [11,40,48].…”

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.…”

LHC phenomenology of unusual top partners in composite Higgs models

“…Moreover, phenomenological aspects of a particular example of such models, dubbed M5 in ref. [25], have been recently worked out in a series of papers, see [26][27][28][29][30]. We will briefly comment on the impact of our findings to phenomenological aspects in the subsequent section.…”