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Extended calculation of dark matter-electron scattering in crystal targets

Griffin, Sinéad M. and Inzani, Katherine and Trickle, Tanner and Zhang, Zhengkang and Zurek, Kathryn M. (2021) Extended calculation of dark matter-electron scattering in crystal targets. Physical Review D, 104 (9). Art. No. 095015. ISSN 2470-0010. doi:10.1103/physrevd.104.095015.

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We extend the calculation of dark matter direct detection rates via electronic transitions in general dielectric crystal targets, combining state-of-the-art density functional theory calculations of electronic band structures and wave functions near the band gap, with semianalytic approximations to include additional states farther away from the band gap. We show, in particular, the importance of all-electron reconstruction for recovering large momentum components of electronic wave functions, which, together with the inclusion of additional states, has a significant impact on direct detection rates, especially for heavy mediator models and at O(10  eV) and higher energy depositions. Applying our framework to silicon and germanium (that have been established already as sensitive dark matter detectors), we find that our extended calculations can appreciably change the detection prospects. Our calculational framework is implemented in an open-source program EXCEED-DM (Extended Calculation of Electronic Excitations for Direct detection of Dark Matter), to be released in an upcoming publication.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Griffin, Sinéad M.0000-0002-9943-4866
Inzani, Katherine0000-0002-3117-3188
Trickle, Tanner0000-0003-1371-4988
Zhang, Zhengkang0000-0001-8305-5581
Zurek, Kathryn M.0000-0002-2629-337X
Additional Information:© 2021 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 15 July 2021; accepted 26 October 2021; published 17 November 2021. We are grateful to Kyle Bystrom for assistance with pawpyseed, and thank Alex Ganose, Thomas Harrelson, Andrea Mitridate, Michele Papucci and Tien-Tien Yu for helpful discussions. We also thank Rouven Essig and Adrian Soto for early correspondence about qedark. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award No. DE-SC0021431 (T. T., Z. Z., K. Z.), by a Simons Investigator Award (K. Z.) and the Quantum Information Science Enabled Discovery (QuantISED) for High Energy Physics (No. KA2401032). This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility located at Lawrence Berkeley National Laboratory, operated under Contract No. DE-AC02-05CH11231. Some of the computations presented here were conducted on the Caltech High Performance Cluster, partially supported by a grant from the Gordon and Betty Moore Foundation. Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0021431
Simons FoundationUNSPECIFIED
Department of Energy (DOE)KA2401032
Department of Energy (DOE)DE-AC02-05CH11231
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:9
Record Number:CaltechAUTHORS:20211124-175423796
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112044
Deposited By: Tony Diaz
Deposited On:24 Nov 2021 18:16
Last Modified:24 Nov 2021 18:16

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