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Träfflista för sökning "WFRF:(Eagan R.) srt2:(2016)"

Sökning: WFRF:(Eagan R.) > (2016)

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1.
  • Aartsen, M. G., et al. (författare)
  • Search for astrophysical tau neutrinos in three years of IceCube data
  • 2016
  • Ingår i: Physical Review D. - 1550-7998 .- 1550-2368. ; 93:2
  • Tidskriftsartikel (refereegranskat)abstract
    • The IceCube Neutrino Observatory has observed a diffuse flux of TeV-PeVastrophysical neutrinos at 5.7 sigma significance from an all-flavor search. The direct detection of tau neutrinos in this flux has yet to occur. Tau neutrinos become distinguishable from other flavors in IceCube at energies above a few hundred TeV, when the cascade from the tau neutrino charged current interaction becomes resolvable from the cascade from the tau lepton decay. This paper presents results from the first dedicated search for tau neutrinos with energies between 214 TeV and 72 PeV in the full IceCube detector. The analysis searches for IceCube optical sensors that observe two separate pulses in a single event-one from the tau neutrino interaction and a second from the tau decay. No candidate events were observed in three years of IceCube data. For the first time, a differential upper limit on astrophysical tau neutrinos is derived around the PeV energy region, which is nearly 3 orders of magnitude lower in energy than previous limits from dedicated tau neutrino searches.
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2.
  • Aartsen, M. G., et al. (författare)
  • The Search For Transient Astrophysical Neutrino Emission With Icecube-Deepcore
  • 2016
  • Ingår i: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 816:2
  • Tidskriftsartikel (refereegranskat)abstract
    • We present the results of a search for astrophysical sources of brief transient neutrino emission using IceCube and DeepCore data acquired between 2012 May 15 and 2013 April 30. While the search methods employed in this analysis are similar to those used in previous IceCube point source searches, the data set being examined consists of a sample of predominantly sub-TeV muon-neutrinos from the Northern Sky (-5 degrees < delta < 90 degrees) obtained through a novel event selection method. This search represents a first attempt by IceCube to identify astrophysical neutrino sources in this relatively unexplored energy range. The reconstructed direction and time of arrival of neutrino events are used to search for any significant self-correlation in the data set. The data revealed no significant source of transient neutrino emission. This result has been used to construct limits at timescales ranging from roughly 1 s to 10 days for generic soft-spectra transients. We also present limits on a specific model of neutrino emission from soft jets in core-collapse supernovae.
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