# Relaxion monodromy and the Weak Gravity Conjecture

@article{Ibez2015RelaxionMA, title={Relaxion monodromy and the Weak Gravity Conjecture}, author={Luis E. Ib{\'a}{\~n}ez and Miguel Montero and {\'A}ngel M. Uranga and Irene Valenzuela}, journal={Journal of High Energy Physics}, year={2015}, volume={2016}, pages={1-38} }

A bstractThe recently proposed relaxion models require extremely large trans-Planckian axion excursions as well as a potential explicitly violating the axion shift symmetry. The latter property is however inconsistent with the axion periodicity, which corresponds to a gauged discrete shift symmetry. A way to make things consistent is to use monodromy, i.e. both the axion and the potential parameters transform under the discrete shift symmetry. The structure is better described in terms of a 3…

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## References

SHOWING 1-10 OF 93 REFERENCES

### Is the relaxion an axion?

- Physics
- 2015

A bstractWe consider the recently proposed cosmological relaxation mechanism where the hierarchy problem is ameliorated, and the electroweak (EW) scale is dynamically selected by a slowly rolling…

### Fencing in the swampland: quantum gravity constraints on large field inflation

- Physics
- 2015

A bstractIn this note we show that models of natural inflation based on closed string axions are incompatible with the weak gravity conjecture (WGC). Specifically, we use T- duality in order to map…

### F-term axion monodromy inflation

- Physics
- 2014

A bstractThe continuous shift symmetry of axions is at the heart of several realizations of inflationary models. In particular, axion monodromy inflation aims at achieving super-Planckian field…

### On axion monodromy inflation in warped throats

- Physics
- 2014

A bstractRecent models of axion monodromy inflation in string theory link the inflationary potential and the moduli stabilization potential. Realistic inflationary models require mechanisms to…

### Transplanckian axions!?

- Physics
- 2015

A bstractWe discuss quantum gravitational effects in Einstein theory coupled to periodic axion scalars to analyze the viability of several proposals to achieve superplanckian axion periods (aka decay…

### Planckian axions and the Weak Gravity Conjecture

- Physics
- 2015

A bstractSeveral recent works [1-3] have claimed that the Weak Gravity Conjecture (WGC) excludes super-Planckian displacements of axion fields, and hence large-field axion inflation, in the absence…

### Sharpening the weak gravity conjecture with dimensional reduction

- Physics
- 2015

A bstractWe investigate the behavior of the Weak Gravity Conjecture (WGC) under toroidal compactification and RG flows, finding evidence that WGC bounds for single photons become weaker in the…

### Relaxing the electroweak scale: the role of broken dS symmetry

- Physics
- 2015

A bstractRecently, a novel mechanism to address the hierarchy problem has been proposed [1], where the hierarchy between weak scale physics and any putative ‘cutoff’ M is translated into a…

### Minkowski 3-forms, flux string vacua, axion stability and naturalness

- Physics
- 2015

A bstractWe discuss the role of Minkowski 3-forms in flux string vacua. In these vacua all internal closed string fluxes are in one to one correspondence with quantized Minkowski 4-forms. By…