Search for Extraterrestrial Antineutrino Sources with the KamLAND Detector

dc.contributor.authorPiepke, Andreas
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-05-13T21:20:15Z
dc.date.available2019-05-13T21:20:15Z
dc.date.issued2012-01-17
dc.description.abstractWe present the results of a search for extraterrestrial electron antineutrinos (v̅ₑ) in the energy range 8.3MeV < E v̅ₑ < 31.8MeV using the KamLAND detector. In an exposure of 4.53 kton-year, we identify 25 candidate events. All of the candidate events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting an upper limit on the probability of ⁸B solar vₑ's converting into v̅ₑ's at 5.3 x 10⁻⁵ (90% CL), if we assume an undistorted v̅ₑ shape. This limit corresponds to a solar v̅ₑ flux of 93 cm⁻²s⁻¹ or an event rate of 1.6 events (kton – year)⁻¹ above the energy threshold (E v̅ₑ ≥ 8.3MeV). The present data also allows us to set more stringent limits on the diffuse supernova neutrino flux and on the annihilation rates for light dark matter particles.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5521
dc.languageEnglish
dc.language.isoen_US
dc.subjectdark matter
dc.subjectISM: supernova remnants
dc.subjectneutrinos
dc.subjectSun: particle emission
dc.titleSearch for Extraterrestrial Antineutrino Sources with the KamLAND Detectoren_US
dc.typetext
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