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Dynamical Clockwork Axions

Rupert Coy
(
- U. Montpellier, L2C
)
,
Michele Frigerio
(
- U. Montpellier, L2C
)
,
Masahiro Ibe
(
- Tokyo U., IPMU and
- Tokyo U., ICRR
)

Jun 14, 2017

41 pages

Published in:

JHEP 10 (2017) 002

Published: Oct 2, 2017

e-Print:

1706.04529 [hep-ph]

DOI:

10.1007/JHEP10(2017)002

Report number:

IPMU17-0087

View in:

reference search42 citations

Citations per year

Abstract: (Springer)

The clockwork mechanism is a novel method for generating a large separation between the dynamical scale and interaction scale of a theory. We demonstrate how the mechanism can arise from a sequence of strongly-coupled sectors. This framework avoids elementary scalar fields as well as ad hoc continuous global symmetries, both of which are subject to serious stability issues. The clockwork factor, q, is determined by the consistency of the strong dynamics. The preserved global U(1) of the clockwork appears as an accidental symmetry, resulting from discrete or U(1) gauge symmetries, and it is spontaneously broken by the chiral condensates. We apply such a dynamical clockwork to construct models with an effectively invisible QCD axion from TeV-scale strong dynamics. The axion couplings are determined by the localisation of the Standard Model interactions along the clockwork sequence. The TeV spectrum includes either coloured hadrons or vector-like quarks. Dark matter can be accounted for by the axion or the lightest neutral baryons, which are accidentally stable.

Note:

41 pages

Beyond Standard Model
Global Symmetries
Discrete Symmetries
Gauge Symmetry
quantum chromodynamics: axion
scale: interaction
symmetry: global
symmetry: gauge
axion: coupling
condensation: chiral

References(103)

Figures(0)

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