Ultra-high energy neutrinos and $W^{\prime}$, $Z^{\prime}$ gauge bosons   at the Pierre Auger Observatory
  A wide range of models beyond the Standard Model predict charged and neutral resonances, generically called $W'$- and $Z'$-bosons, respectively. We present a study of the impact of such resonances on the deep inelastic scattering of ultra-high energy neutrinos as well as on the resonant charged current $\bar\nu_e e^-$ scattering (Glashow resonance). We find that the effects of such resonances can not be observed with the Pierre Auger Observatory or any foreseeable upgrade of it. 
Florian Lyonnet
hep-ph