3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

Naturalness of the relaxion mechanism

7 Jul 2016, 14:20
20m
Alice Hoy Room 242 ()

Alice Hoy Room 242

Talk Non-SUSY and Exotics Non-SUSY and Exotics

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.

Primary 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))

Presentation Materials