The Holographic QCD Axion
High Energy Physics - Theory
2019-12-13 v2 High Energy Physics - Phenomenology
Abstract
A holographic model of QCD axion is presented. It describes a composite axion in the KSVZ class. Having a gravity dual, based on the Witten-Sakai-Sugimoto model, it is calculable in the strongly coupled regime. Its basic properties are derived, including the low energy Lagrangian, from which the axion couplings to nucleons can be derived. Basic features in the deconfined phase are studied as well. In particular, the temperature dependence of the axion mass is extracted from the topological susceptibility. As an aside, the topological susceptibility of strongly coupled SYM at finite temperature is derived for the first time.
Cite
@article{arxiv.1906.12117,
title = {The Holographic QCD Axion},
author = {Francesco Bigazzi and Alessio Caddeo and Aldo L. Cotrone and Paolo Di Vecchia and Andrea Marzolla},
journal= {arXiv preprint arXiv:1906.12117},
year = {2019}
}
Comments
Latex, 47 pages, 4 figures; v2: comments and references added, typos corrected