期刊
PHYSICAL REVIEW D
卷 105, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.105.015010
关键词
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资金
- U.S. Department of Energy, Office of Science, Office of High Energy Physics [DE-SC00 21431]
- Quantum Information Science Enabled Discovery (QuantISED) for High Energy Physics [KA2401032]
Single phonon excitations are sensitive probes for keV-GeV dark matter, with directional dependence and daily modulation in anisotropic target materials. Al2O3 (sapphire), CaWO4, and h-BN (hexagonal boron nitride) are highlighted as the best polar materials for recovering daily modulation signals.
Single phonon excitations are sensitive probes of light-dark matter in the keV-GeV mass window. For anisotropic target materials, the signal depends on the direction of the incoming dark matter wind and exhibits a daily modulation. We discuss in detail the various sources of anisotropy and carry out a comparative study of 26 crystal targets, focused on sub-MeV dark matter benchmarks. We compute the modulation reach for the most promising targets, corresponding to the cross section where the daily modulation can be observed for a given exposure, which allows us to combine the strength of dark matterphonon couplings and the amplitude of daily modulation. We highlight Al2O3 (sapphire), CaWO4, and h-BN (hexagonal boron nitride) as the best polar materials for recovering a daily modulation signal, which feature O(1-100)% variations of detection rates throughout the day, depending on the dark matter mass and interaction. The directional nature of single phonon excitations offers a useful handle to mitigate backgrounds, which is crucial for fully realizing the discovery potential of near future experiments.
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