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A novel way of constraining WIMPs annihilations in the Sun: MeV neutrinos

AuthorsBernal, Nicolás; Martín-Albo, Justo ; Palomares Ruiz, Sergio
Keywordsdark matter theory
neutrino detectors
neutrino experiments
Issue Date1-Aug-2013
PublisherInstitute of Physics Publishing
CitationJournal of Cosmology and Astroparticle Physics 08 (8): 011 - 19 (2013)
AbstractAnnihilation of dark matter particles accumulated in the Sun would produce a flux of high-energy neutrinos whose prospects of detection in neutrino telescopes and detectors have been extensively discussed in the literature. However, for annihilations into Standard Model particles, there would also be a flux of neutrinos in the MeV range from the decays at rest of muons and positively charged pions. These low-energy neutrinos have never been considered before and they open the possibility to also constrain dark matter annihilation in the Sun into e(+)e(-), mu(+)mu(-) or light quarks. Here we perform a detailed analysis using the recent Super-Kamiokande data in the few tens of MeV range to set limits on the WIMP-nucleon scattering cross section for different annihilation channels and computing the evaporation rate of WIMPs from the Sun for all values of the scattering cross section in a consistent way.
Publisher version (URL)http://dx.doi.org/10.1088/1475-7516/2013/08/011
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