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Directly Detecting MeV-Scale Dark Matter Via Solar Reflection

An, Haipeng and Pospelov, Maxim and Pradler, Josef and Ritz, Adam (2018) Directly Detecting MeV-Scale Dark Matter Via Solar Reflection. Physical Review Letters, 120 (14). Art. No. 141801. ISSN 0031-9007. doi:10.1103/PhysRevLett.120.141801.

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If dark matter (DM) particles are lighter than a few MeV/c^2 and can scatter off electrons, their interaction within the solar interior results in a considerable hardening of the spectrum of galactic dark matter received on Earth. For a large range of the mass versus cross section parameter space, {m_e,σ_e}, the “reflected” component of the DM flux is far more energetic than the end point of the ambient galactic DM energy distribution, making it detectable with existing DM detectors sensitive to an energy deposition of 10−10^3 eV. After numerically simulating the small reflected component of the DM flux, we calculate its subsequent signal due to scattering on detector electrons, deriving new constraints on σ_e in the MeV and sub-MeV range using existing data from the XENON10/100, LUX, PandaX-II, and XENON1T experiments, as well as making projections for future low threshold direct detection experiments.

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Alternate Title:Direct Detection of MeV-scale Dark Matter via Solar Reflection
Additional Information:© 2018 The Authors. 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. H. A. is supported by the Walter Burke Institute at Caltech and by DOE Award No. DE-SC0011632. The work of M. P. and A. R. is supported in part by NSERC, Canada, and research at the Perimeter Institute is supported in part by the Government of Canada through NSERC and by the Province of Ontario through Ministry of Economic Development and Trade. J. P. is supported by the New Frontiers program of the Austrian Academy of Sciences.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Walter Burke Institute for Theoretical Physics, CaltechUNSPECIFIED
Department of Energy (DOE)DE-SC0011632
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Ontario Ministry of Economic Development and TradeUNSPECIFIED
Österreichische Akademie der WissenschaftenUNSPECIFIED
Issue or Number:14
Record Number:CaltechAUTHORS:20171023-132943953
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82590
Deposited By: Tony Diaz
Deposited On:24 Oct 2017 18:23
Last Modified:15 Nov 2021 19:51

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