Probing the top-Higgs sector with composite Higgs models at present and future hadron colliders

A bstract We study the production of $$ t\overline{t}h t ¯ h and t\overline{t} hh hh at hadron colliders, in minimal Composite Higgs Models, based on coset SO(5) / SO(4). explore fermionic representations 5 14 . detailed phenomenological analysis is performed, covering energy range LHC its High Luminosity upgrade, as well that a future 100 TeV collider. Both resonant non-resonant are considered, stressing interplay complementary interest these channels with each other double production. provide sets representative points experimental outcomes terms modification cross sections resonance masses branching ratios. For production, we gauge relative importance Yukawa, trilinear, contact vertices to processes, consider prospect for distinguishing fermion from Standard Model. In top partners, find three-body decay channel W + – t becomes significant certain regions parameter space having degenerate spectrum, further enhanced by increasing partner’s mass. This motivates both higher machines need go beyond current performed searches resonances.