Recent progress on QCD inputs for axion phenomenology
High Energy Physics - Lattice
2017-04-05 v1 High Energy Physics - Phenomenology
Abstract
The properties of the QCD axion are strictly related to the dependence of strong interactions on the topological parameter theta. We present a determination of the topological properties of QCD for temperatures up to around 600 MeV, obtained by lattice QCD simulations with 2+1 flavors and physical quark masses. Numerical results for the topological susceptibility, when compared to instanton gas computations, differ both in size and in the temperature dependence. We discuss the implications of such findings for axion phenomenology, also in comparison to similar studies in the literature, and the prospects for future investigations.
Cite
@article{arxiv.1612.06269,
title = {Recent progress on QCD inputs for axion phenomenology},
author = {Claudio Bonati and Massimo D'Elia and Marco Mariti and Guido Martinelli and Michele Mesiti and Francesco Negro and Francesco Sanfilippo and Giovanni Villadoro},
journal= {arXiv preprint arXiv:1612.06269},
year = {2017}
}
Comments
Invited talk at XII Quark Confinement, 29 August - 3 September, 2016, Thessaloniki, Greece, 9 pages, 6 figures