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Directional Detectability of Dark Matter With Single Phonon Excitations: Target Comparison

Coskuner, Ahmet and Trickle, Tanner and Zhang, Zhengkang and Zurek, Kathryn M. (2021) Directional Detectability of Dark Matter With Single Phonon Excitations: Target Comparison. . (Submitted)

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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 DM-phonon 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.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Trickle, Tanner0000-0003-1371-4988
Zurek, Kathryn M.0000-0002-2629-337X
Additional Information:We thank Sin´ead Griffin and Katie Inzani for previous collaboration on DFT calculations (published in Ref. [50]) utilized in this work. We also thank Matt Pyle for useful discussions. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award Number DE-SC0021431, and the Quantum Information Science Enabled Discovery (QuantISED) for High Energy Physics (KA2401032).
Group:Walter Burke Institute for Theoretical Physics
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Department of Energy (DOE)DE-SC0021431
Quantum Information Science Enabled Discovery for High Energy PhysicsKA2401032
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Record Number:CaltechAUTHORS:20210511-122716246
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109081
Deposited By: Joy Painter
Deposited On:12 May 2021 16:35
Last Modified:12 May 2021 16:35

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