Abstract
We show that XENON1T and future liquid xenon (LXe) direct detection experiments are sensitive to axions through the standard g_{aγ}aFF[over ˜] operators due to inverse-Primakoff scattering. This previously neglected channel significantly improves the sensitivity to the axion-photon coupling, with a reach extending to g_{aγ}∼10^{-10} GeV^{-1} for axion masses up to a keV, thereby extending into the region of heavier QCD axion models. This result modifies the couplings required to explain the XENON1T excess in terms of solar axions, opening a large region of g_{aγ}-m_{a} parameter space that is not ruled out by the CAST helioscope experiment and reducing the tension with the astrophysical constraints. We explore the sensitivity to solar axions for future generations of LXe detectors that can exceed future helioscope experiments, such as IAXO, for a large region of parameter space.
Highlights
We show that XENON1T and future liquid xenon (LXe) direct detection experiments are sensitive to axions through the standard gaγaFFoperators due to inverse-Primakoff scattering
We explore the sensitivity to solar axions for future generations of LXe detectors that can exceed future helioscope experiments, such as IAXO, for a large region of parameter space
Notable among the wide class of beyond standard model physics searches at direct detection facilities is the extraordinary sensitivity to possible axion or axionlike particles [we will use the generic “axion” to encompass both cases, with the modifier QCD added when dealing with specific models developed to address the strong CP problem of QCD] coupling to standard model particles (SM) [1,2,3,4,5,6,7]
Summary
Inverse Primakoff Scattering as a Probe of Solar Axions at Liquid Xenon Direct Detection Experiments We show that XENON1T and future liquid xenon (LXe) direct detection experiments are sensitive to axions through the standard gaγaFFoperators due to inverse-Primakoff scattering.
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