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New Sensitivity to Solar WIMP Annihilation using Low-Energy Neutrinos

Rott, Carsten and Siegal-Gaskins, Jennifer M. and Beacom, John F. (2013) New Sensitivity to Solar WIMP Annihilation using Low-Energy Neutrinos. Physical Review D, 88 (5). Art. No. 055005. ISSN 0556-2821.

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Dark matter particles captured by the Sun through scattering may annihilate and produce neutrinos, which escape. Current searches are for the few high-energy neutrinos produced in the prompt decays of some final states. We show that interactions in the solar medium lead to a large number of pions for nearly all final states. Positive pions and muons decay at rest, producing low-energy neutrinos with known spectra, including ν_e through neutrino mixing. We demonstrate that Super-Kamiokande can thereby provide a new probe of the spin-dependent WIMP-proton cross section. Compared to other methods, the sensitivity is competitive and the uncertainties are complementary.

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Additional Information:© 2013 American Physical Society. Received 3 August 2012; published 3 September 2013. We are grateful to Basu Dasgupta, Louie Strigari, and Petr Vogel for helpful discussions. J. S.-G. was supported by NASA through Einstein Postdoctoral Fellowship Grant No. PF1-120089 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under Contract No. NAS8-03060. J. F. B. was supported by NSF Grant No. PHY-1101216.
Funding AgencyGrant Number
NASA Einstein Postdoctoral FellowshipPF1-120089
Classification Code:PACS: 95.35.+d, 26.65.+t, 95.85.Ry, 96.60.Vg
Record Number:CaltechAUTHORS:20130117-105418827
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36453
Deposited By: JoAnn Boyd
Deposited On:08 Feb 2013 05:16
Last Modified:04 Oct 2013 21:16

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