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We expound the impact of extra sterile species on the ultra high energyneutrino fluxes in neutrino telescopes. We use three types of well-known fluxratios and compare the values of these flux ratios in presence of sterileneutrinos, with those predicted by deviation from the tribimaximal mixingscheme. We show that in the upcoming neutrino telescopes, its easy to confusebetween the signature of sterile neutrinos with that of the deviation fromtribimaximal mixing. We also show that if the measured flux ratios acquire avalue well outside the range predicted by the standard scenario with threeactive neutrinos only, it might be possible to tell the presence of extrasterile neutrinos by observing ultra high energy neutrinos in future neutrinotelescopes.

Confusing Sterile Neutrinos with Deviation from Tribimaximal Mixing at Neutrino Telescopes