Prospects for observations of high-energy cosmic tau neutrinos

Abstract

We study prospects for the observations of high-energy cosmic tau neutrinos (E ≥ 10 6 GeV) originating from proton acceleration in the cores of active galactic nuclei. We consider the possibility that vacuum flavor neutrino oscillations induce a tau to muon neutrino flux ratio greatly exceeding the rather small value expected from intrinsic production. The criterias and event rates for under water/ice lightČerenkov neutrino telescopes are given by considering the possible detection of downgoing high-energy cosmic tau neutrinos through characteristic double shower events. PACS number(s): 95.55. Vj, 14.60.Pq, 13.15.+g, 98.54.Cm

Erratum: Measuring flavor ratios of high-energy astrophysical neutrinos [Phys. Rev. D 68, 093005 (2003)]

“…Double-bang events [24,42,43] consist of a hadronic shower initiated by a charged-current interaction of the ν τ followed by a second energetic shower (hadronic or electromagnetic) from the decay of the resulting tau lepton. Lollipop events consist of the second of the two double-bang showers along with the reconstructed tau lepton track (the first bang may be detected or not).…”

High Energy Neutrino Flash From Far-UV/X-Ray Flares of Gamma-Ray Bursts

“…But, the neutrinos will be almost equally distributed among flavors as a result of vacuum neutrino oscillations [1]. So there may be a possibility that we can detect ν τ through double bang events [39].…”

Neutrino masses and mixing from the astrophysical perspective

“…Wherever high-energy hadrons interact with matter or radiation ("cosmic beam dumps"), a secondary flux of pions is produced which decays according to the usual pattern x+ + p+u,, and /_L+ + P,e+u, as well as X-+ ~-0~ and p-+ v,e-Ce. Therefore, one expects a neutrino flux with a flavor composition v, : vcl : v, = 1 : 2 : 0, or more precisely, a u, fraction below the lob5 level which is produced by the decay of a small fraction of D, mesons in the beam dump [41].…”