Although they are best known for studying astrophysical neutrinos , neutrino telescopes like IceCube can study neutrino interactions , at energies far above those that are accessible at accelerators .
In this writeup , I present two IceCube analyses of neutrino interactions at energies far above 1 TeV .
The first measures neutrino absorption in the Earth , and , from that determines the neutrino-nucleon cross-section at energies between 6.3 and 980 TeV .
We find that the cross-sections is 1.30 ^ { +0.21 } _ { -0.19 } ( stat . ) ^ { +0.39 } _ { -0.43 } ( syst . )
times the Standard Model cross-section .
We also present a measurement of neutrino inelasticity , using \nu _ { \mu } charged-current interactions that occur within IceCube .
We have measured the average inelasticity at energies from 1 TeV to above 100 TeV , and found that it is in agreement with the Standard Model expectations .
We have also performed a series of fits to this track sample and a matching cascade sample , to probe aspects of the astrophysical neutrino flux , particularly the flavor ratio .