Minimally extended SILH

Understand

Higgs boson compositeness is a phenomenologically viable scenario addressing the hierarchy problem.

• In minimal models, the Higgs boson is the only degree of freedom of the strong sector below the strong interaction scale.
• We present here the simplest extension of such a framework with an additional composite spin-zero singlet.
• To this end, we adopt an effective field theory approach and develop a set of rules to estimate the size of the various operator coefficients, relating them to the parameters of the strong sector and its structural features.