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Title: Detection of light dark matter with optical phonons in polar materials

Abstract

We show that polar materials are excellent targets for direct detection of sub-GeV dark matter due to the presence of gapped optical phonons as well as acoustic phonons with high sound speed. We take the example of Gallium Arsenide (GaAs), which has the properties needed for experimental realization, and where many results can be estimated analytically. We find GaAs has excellent reach to dark photon absorption, can completely cover the freeze-in benchmark for scattering via an ultralight dark photon, and is competitive with other proposals to detect sub-MeV dark matter scattering off nuclei.

Authors:
 [1];  [2];  [3];  [4]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group
  2. Univ. of California, Berkeley, CA (United States). Center for Theoretical Physics
  3. Univ. of California, San Diego, CA (United States). Dept. of Physics
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1467950
Alternate Identifier(s):
OSTI ID: 1544222
Grant/Contract Number:  
AC02-05CH11231; PHY-1316783; PHY-1002399; PHY-1607611
Resource Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 785; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Knapen, Simon, Lin, Tongyan, Pyle, Matt, and Zurek, Kathryn M. Detection of light dark matter with optical phonons in polar materials. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.08.064.
Knapen, Simon, Lin, Tongyan, Pyle, Matt, & Zurek, Kathryn M. Detection of light dark matter with optical phonons in polar materials. United States. doi:10.1016/j.physletb.2018.08.064.
Knapen, Simon, Lin, Tongyan, Pyle, Matt, and Zurek, Kathryn M. Fri . "Detection of light dark matter with optical phonons in polar materials". United States. doi:10.1016/j.physletb.2018.08.064.
@article{osti_1467950,
title = {Detection of light dark matter with optical phonons in polar materials},
author = {Knapen, Simon and Lin, Tongyan and Pyle, Matt and Zurek, Kathryn M.},
abstractNote = {We show that polar materials are excellent targets for direct detection of sub-GeV dark matter due to the presence of gapped optical phonons as well as acoustic phonons with high sound speed. We take the example of Gallium Arsenide (GaAs), which has the properties needed for experimental realization, and where many results can be estimated analytically. We find GaAs has excellent reach to dark photon absorption, can completely cover the freeze-in benchmark for scattering via an ultralight dark photon, and is competitive with other proposals to detect sub-MeV dark matter scattering off nuclei.},
doi = {10.1016/j.physletb.2018.08.064},
journal = {Physics Letters. Section B},
number = C,
volume = 785,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2018.08.064

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