Relaxion monodromy and the weak gravity conjecture
From MaRDI portal
Publication:1638499
DOI10.1007/JHEP04(2016)020zbMATH Open1388.83923arXiv1512.00025OpenAlexW2185975561WikidataQ123293130 ScholiaQ123293130MaRDI QIDQ1638499
Author name not available (Why is that?)
Publication date: 12 June 2018
Published in: (Search for Journal in Brave)
Abstract: The 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-form field coupling to the SM Higgs through its field strength . The 4-form also couples linearly to the relaxion, in the Kaloper-Sorbo fashion. The extremely small relaxion-Higgs coupling arises in a see-saw fashion as , with being the axion decay constant. We discuss constraints on this type of constructions from membrane nucleation and the Weak Gravity Conjecture. The latter requires the existence of membranes, whose too fast nucleation could in principle drive the theory out of control, unless the cut-off scale is lowered. This allows to constrain relaxion models on purely theoretical grounds. We also discuss possible avenues to embed this structure into string theory.
Full work available at URL: https://arxiv.org/abs/1512.00025
No records found.
No records found.
This page was built for publication: Relaxion monodromy and the weak gravity conjecture
Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q1638499)
