Astrophobic Axions
Abstract
We propose a class of axion models with generation dependent Peccei-Quinn charges for the known fermions that allow to suppress the axion couplings to nucleons and electrons. Astrophysical limits are thus relaxed, allowing for axion masses up to eV. The axion-photon coupling remains instead sizeable, so that next generation helioscopes will be able to probe this scenario. Astrophobia unavoidably implies flavor violating axion couplings, so that experimental limits on flavour-violating processes can provide complementary probes. The astrophobic axion can be a viable dark matter candidate in the heavy mass window, and can also account for anomalous energy loss in stars.
Keywords
Cite
@article{arxiv.1712.04940,
title = {Astrophobic Axions},
author = {Luca Di Luzio and Federico Mescia and Enrico Nardi and Paolo Panci and Robert Ziegler},
journal= {arXiv preprint arXiv:1712.04940},
year = {2018}
}
Comments
6 pages, 1 figure. Major revisions and clarifications in the presentation, results unchanged. Title changed as suggested by Journal; references added; version to be published in Phys. Rev. Lett