First all-flavor search for transient neutrino emission using 3-years of IceCube DeepCore data

Collaboration
Nov 10, 2020
19 pages
Published in:
  • JCAP 01 (2022) 027
  • Published: Jan 18, 2022
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Experiments:

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Abstract: (IOP)
Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins have focused primarily at TeV-PeV energies. Compared to sub-TeV searches, high-energy searches benefit from an increase in the neutrino cross section, improved angular resolution on the neutrino direction, and a reduced background from atmospheric neutrinos and muons. However, the focus on high energy does not preclude the existence of sub-TeV neutrino emission where IceCube retains sensitivity. Here we present the first all-flavor search from IceCube for transient emission of low-energy neutrinos, focusing on the energy region of 5.6-100 GeV using three years of data obtained with the IceCube-DeepCore detector. We find no evidence of transient neutrino emission in the data, thus leading to a constraint on the volumetric rate of astrophysical transient sources in the range of ∼ 705-2301 Gpc3^{-3} yr1^{-1} for sources following a subphotospheric energy spectrum with a mean energy of 100 GeV and a bolometric energy of 1052^{52} erg.
Note:
  • 16 pages, 10 figures. Update from previous arXiv version reflects a change to the title, minor text edits, and additional description of the statistical derivation of the results, which were all part of the JCAP review process
  • neutrino astronomy
  • neutrino experiments
  • gamma ray burst experiments
  • neutrino: atmosphere
  • neutrino: energy: low
  • energy: high
  • IceCube
  • GeV
  • angular resolution
  • energy spectrum