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Neutrinos from WIMP annihilations obtained using a full three-flavor Monte Carlo approach
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0001-5948-9152
KTH, Skolan för teknikvetenskap (SCI), Teoretisk fysik, Teoretisk partikelfysik.ORCID-id: 0000-0002-3525-8349
2008 (Engelska)Ingår i: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, Vol. 2008, nr 01, s. 021-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Weakly interacting massive particles (WIMPs) are one of the main candidates for making up the dark matter in the Universe. If these particles make up the dark matter, then they can be captured by the Sun or the Earth, sink to the respective cores, annihilate, and produce neutrinos. Thus, these neutrinos can be a striking dark matter signature at neutrino telescopes looking towards the Sun and/or the Earth. Here, we improve previous analyses on computing the neutrino yields from WIMP annihilations in several respects. We include neutrino oscillations in a full three-flavor framework as well as all effects from neutrino interactions on the way through the Sun (absorption, energy loss, and regeneration from tau decays). In addition, we study the effects of non-zero values of the mixing angle theta(13) as well as the normal and inverted neutrino mass hierarchies. Our study is performed in an event-based setting which makes these results very useful both for theoretical analyses and for building a neutrino telescope Monte Carlo code. All our results for the neutrino yields, as well as our Monte Carlo code, are publicly available. We find that the yield of muontype neutrinos from WIMP annihilations in the Sun is enhanced or suppressed, depending on the dominant WIMP annihilation channel. This effect is due to an effective favor mixing caused by neutrino oscillations. For WIMP annihilations inside the Earth, the distance from source to detector is too small to allow for any significant amount of oscillations at the neutrino energies relevant for neutrino telescopes.

Ort, förlag, år, upplaga, sidor
IOP Publishing / SISSA , 2008. Vol. 2008, nr 01, s. 021-
Nyckelord [en]
dark matter, neutrino properties, dark-matter annihilations, oscillations, sun, telescopes, candidates, spectra, mass
Nationell ämneskategori
Subatomär fysik
Identifikatorer
URN: urn:nbn:se:kth:diva-17300DOI: 10.1088/1475-7516/2008/01/021ISI: 000252932200011Scopus ID: 2-s2.0-38949163779OAI: oai:DiVA.org:kth-17300DiVA, id: diva2:335343
Forskningsfinansiär
Vetenskapsrådet, 622-2003-6025Vetenskapsrådet, 621-2005-3588
Anmärkning
QC 20100525Tillgänglig från: 2011-06-21 Skapad: 2010-08-05 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Förlagets fulltextScopusJournal of Cosmology and Astroparticle Physicshttp://arxiv.org/abs/0709.3898

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Blennow, MattiasOhlsson, Tommy

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