A Search for UHE Tau Neutrinos with IceCube

Details A Search for UHE Tau Neutrinos with IceCube A Search for UHE Tau Neutrinos with IceCube

2012-02-21

arxiv.org/abs/1202.4564v2

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

14 pages, submitted to Phys. Rev. D; Added and corrected references. Modified text to clarify how final limit was derived. Fin

Scientific paper

The first dedicated search for ultra-high energy (UHE) tau neutrinos of astrophysical origin was performed using the IceCube detector in its 22-string configuration. The search also had sensitivity to UHE electron and muon neutrinos. After application of all selection criteria to approximately 200 live-days of data, we expect a background of 0.60 +/- 0.19 (stat.) $^{+0.56}_{-0.58}$ (sys.) events and observe three events, which after inspection emerge as being compatible with background. Therefore, we set an upper limit on neutrinos of all flavors from UHE astrophysical sources at 90% CL of $E^{2} \Phi(\nu_{x}) < 16.2 * 10^-8 GeV cm^-2 sr^-1 s^-1 over an estimated primary neutrino energy range of 340 TeV to 200 PeV.

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