Undulating dark matter
Publication Date
2020-11-23Journal Title
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Volume
2020
Issue
11
Language
en
Type
Article
This Version
VoR
Metadata
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Davighi, J., McCullough, M., & Tooby-Smith, J. (2020). Undulating dark matter. Journal of High Energy Physics, 2020 (11) https://doi.org/10.1007/jhep11(2020)120
Abstract
Abstract: We suggest that an interplay between microscopic and macroscopic physics can give rise to dark matter (DM) whose interactions with the visible sector fundamentally undulate in time, independent of celestial dynamics. A concrete example is provided by fermionic DM with an electric dipole moment (EDM) sourced by an oscillating axion-like field, resulting in undulations in the scattering rate. The discovery potential of light DM searches can be enhanced by additionally searching for undulating scattering rates, especially in detection regions where background rates are large and difficult to estimate, such as for DM masses in the vicinity of 1 MeV where DM-electron scattering dominantly populates the single electron bin. An undulating signal could also reveal precious dark sector information after discovery. In this regard we emphasise that, if the recent XENON1T excess of events is due to light DM scattering exothermically off electrons, future analyses of the time-dependence of events could offer clues as to the microscopic origins of the putative signal.
Keywords
Regular Article - Theoretical Physics, Beyond Standard Model, Cosmology of Theories beyond the SM, CP violation
Identifiers
jhep11(2020)120, 14236
External DOI: https://doi.org/10.1007/jhep11(2020)120
This record's URL: https://www.repository.cam.ac.uk/handle/1810/313264
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/
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