Speaker
Andrew Fowlie
Description
The relaxion mechanism is a novel solution to the hierarchy problem that utilizes the dynamics of an axion-like field. I discuss results from the first statistical analysis of the relaxion mechanism (arXiv:1602.03889), in which we quantified the relative plausibility of a QCD and a non-QCD relaxion model versus the Standard Model with Bayesian statistics, which includes an automatic penalty for fine-tuning. We included experimental constraints upon the weak-scale, $\theta_\text{QCD}$ and inflationary observables measured by Planck/BICEP. Whilst we confirmed that relaxion models could solve the hierarchy problem, we found that their unconventional cosmology demolishes their plausibility.
Author
Andrew Fowlie
Co-authors
Csaba Balazs
(Monash University)
Graham White
(Monash university)
Luca Marzola
(University Of Tartu)
Martti Raidal
(Nat. Inst. of Chem.Phys. & Biophys. (EE))
