Constraints on the relaxion mechanism with strongly interacting vector-fermions

A bstract 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...

Full description

Saved in:

Bibliographic Details
Published in:	The journal of high energy physics 2017-08, Vol.2017 (8), p.1, Article 93
Main Authors:	Beauchesne, Hugues, Bertuzzo, Enrico, di Cortona, Giovanni Grilli
Format:	Article
Language:	eng
Subjects:	Big bang cosmology Classical and Quantum Gravitation Confinement Electroweak model Elementary Particles Fermions High energy physics Nuclei (nuclear physics) Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Theoretical Physics Relativity Theory String Theory Studies Tuning
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	A bstract 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. Combining our bounds, we show that the relaxion mechanism becomes increasingly constrained and finetuned as the confinement scale decreases. For example, a confinement scale of a few tens of MeVs would require tuning at the percent level.
ISSN:	1029-8479 1029-8479