Constraints on the relaxion mechanism with strongly interacting vector-fermions

Understand

We study the experimental constraints on strongly interacting vector-fermions compatible with the relaxion mechanism and investigate any possible tuning.

• The focus is on a minimal model and low confinement scale.
• More precisely, we study bounds from electroweak precision tests, Higgs decay, Big Bang nucleosynthesis and direct collider searches.
• The effect of these new fermions on vacuum stability is also investigated.