Fuzzy Dark Matter candidates from string theory

29Citations
Citations of this article
6Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

String theory has been claimed to give rise to natural fuzzy dark matter candidates in the form of ultralight axions. In this paper we revisit this claim by a detailed study of how moduli stabilisation affects the masses and decay constants of different axion fields which arise in type IIB flux compactifications. We find that obtaining a considerable contribution to the observed dark matter abundance without tuning the axion initial misalignment angle is not a generic feature of 4D string models since it requires a mild violation of the Sf ≲ MP bound, where S is the instanton action and f the axion decay constant. Our analysis singles out C4-axions, C2-axions and thraxions as the best candidates to realise fuzzy dark matter in string theory. For all these ultralight axions we provide predictions which can be confronted with present and forthcoming observations.

Cite

CITATION STYLE

APA

Cicoli, M., Guidetti, V., Righi, N., & Westphal, A. (2022). Fuzzy Dark Matter candidates from string theory. Journal of High Energy Physics, 2022(5). https://doi.org/10.1007/JHEP05(2022)107

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free