Solar reflection of dark matter

Haipeng An, Haoming Nie, Maxim Pospelov, Josef Pradler, Adam Ritz

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The scattering of light dark matter off thermal electrons inside the Sun produces a "fast"subcomponent of the dark matter flux that may be detectable in underground experiments. We update and extend previous work by analyzing the signatures of dark matter candidates which scatter via light mediators. Using numerical simulations of the dark matter-electron interaction in the solar interior, we determine the energy spectrum of the reflected flux, and calculate the expected rates for direct detection experiments. We find that large Xenon-based experiments (such as XENON1T) provide the strongest direct limits for dark matter masses below a few MeV, reaching a sensitivity to the effective dark matter charge of ∼10-9e.

Original languageEnglish (US)
Article number103026
JournalPhysical Review D
Issue number10
StatePublished - Nov 15 2021
Externally publishedYes

Bibliographical note

Funding Information:
H. A. is supported by NSFC under Grant No. 11975134, the National Key Research and Development Program of China under Grant No. 2017YFA0402204 and the Tsinghua University Initiative Scientific Research Program. M. P. is supported in part by U.S. Department of Energy (Grant No. DE-SC0011842). J. P. is supported by the New Frontiers Program of the Austrian Academy of Sciences and by the Austrian Science Fund (FWF) Grant No. FG 1. A. R. is supported in part by NSERC, Canada.

Publisher Copyright:
© 2021 authors. Published by the American Physical Society.


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