Quark mass uncertainties revive KSVZ axion dark matter

Details Quark mass uncertainties revive KSVZ axion dark matter Quark mass uncertainties revive KSVZ axion dark matter

2007-05-03

arxiv.org/abs/0705.0542v2

JCAP 0707:012,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 5 figures

Scientific paper

10.1088/1475-7516/2007/07/012

The Kaplan-Manohar ambiguity in light quark masses allows for a larger uncertainty in the ratio of up to down quark masses than naive estimates from the chiral Lagrangian would indicate. We show that it allows for a relaxation of experimental bounds on the QCD axion, specifically KSVZ axions in the $2-3 \mu$eV mass range composing 100% of the galactic dark matter halo can evade the experimental limits placed by the ADMX collaboration.

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