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Search for ultralight dark matter in the SuperMAG high-fidelity dataset
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Search for ultralight dark matter in the SuperMAG high-fidelity dataset
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Paper
Search for ultralight dark matter in the SuperMAG high-fidelity dataset
2024
Overview
Ultralight dark matter, such as kinetically mixed dark-photon dark matter (DPDM) or axionlike-particle dark matter (axion DM), can source an oscillating magnetic-field signal at Earth's surface. Previous work searched for this signal in a publicly available dataset of global magnetometer measurements maintained by the SuperMAG collaboration. This \"low-fidelity\" dataset reported measurements with a 1-minute time resolution, allowing the search to set leading direct constraints on DPDM and axion DM with Compton frequencies \\(f_\\mathrm{DM}\\leq1/(1\\,\\mathrm{min})\\) [corresponding to masses \\(m_\\mathrm{DM}\\leq7\\times10^{-17}\\,\\mathrm{eV}\\)]. More recently, a dedicated experiment undertaken by the SNIPE Hunt collaboration has also searched for this same signal at higher frequencies \\(f_\\mathrm{DM}\\geq0.5\\,\\mathrm{Hz}\\) (or \\(m_\\mathrm{DM}\\geq2\\times10^{-15}\\,\\mathrm{eV}\\)). In this work, we search for this signal of ultralight DM in the SuperMAG \"high-fidelity\" dataset, which features a 1-second time resolution, allowing us to probe the gap in parameter space between the low-fidelity dataset and the SNIPE Hunt experiment. The high-fidelity dataset exhibits lower geomagnetic noise than the low-fidelity dataset and features more data than the SNIPE Hunt experiment, making it a powerful probe of ultralight DM. Our search finds no robust DPDM or axion DM candidates. We set constraints on DPDM and axion DM parameter space for \\(10^{-3}\\,\\mathrm{Hz}\\leq f_\\mathrm{DM}\\leq0.98\\,\\mathrm{Hz}\\) (or \\(4\\times10^{-18}\\,\\mathrm{eV}\\leq m_\\mathrm{DM}\\leq4\\times10^{-15}\\,\\mathrm{eV}\\)). Our results are the leading direct constraints on both DPDM and axion DM in this mass range, and our DPDM constraint surpasses the leading astrophysical constraint in a narrow range around \\(m_{A'}\\approx2\\times10^{-15}\\,\\mathrm{eV}\\).
Publisher
Cornell University Library, arXiv.org
Subject
