Aalbers, J., Akerib, D.S., Al Musalhi, A.K. et al. (205 more authors) (2025) New constraints on cosmic ray-boosted dark matter from the LUX-ZEPLIN experiment. Physical Review Letters, 134 (24). 241801. ISSN 0031-9007
Abstract
While dual-phase xenon time projection chambers have driven the sensitivity toward weakly interacting massive particles at the GeV=c2 to TeV=c2 mass scale, the scope for sub-GeV=c2 dark matter particles is hindered by a limited nuclear recoil energy detection threshold. One approach to probe for lighter candidates is to consider cases where they have been boosted by collisions with cosmic rays in the Milky Way, such that the additional kinetic energy lifts their induced signatures above the nominal threshold. In this Letter, we report first results of a search for cosmic ray-boosted dark matter (CRDM) with a combined 4.2 metric ton=yr exposure from the LUX-ZEPLIN experiment. We observe no excess above the expected backgrounds and establish world-leading constraints on the spin-independent CRDM-nucleon cross section as small as 3.9 × 10−33 cm2 at 90% confidence level for sub-GeV=c2 masses.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. (https://creativecommons.org/licenses/by/4.0/) 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. |
Keywords: | Nuclear and Plasma Physics; Particle and High Energy Physics; Physical Sciences |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/W000547/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 Jun 2025 11:34 |
Last Modified: | 25 Jun 2025 11:34 |
Status: | Published |
Publisher: | American Physical Society (APS) |
Refereed: | Yes |
Identification Number: | 10.1103/nr92-jvt3 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:228351 |