  Inspired by Gounaris-Sakurai and Lee-Zumino, we postulate that the weak
vector and axial vector currents are dominated by $J^{PC} = 1^{--}$ and
$1^{++}$ resonances respectively in the appropriate channels of $\nu + \bar
\nu$ annihilation into quark-antiquark pairs when an ultrahigh-energy incoming
$\nu \ (\bar \nu)$ strikes a relic $\bar \nu \ (\nu)$. Despite this and some
other ideas, it appears the detection of relic neutrinos with just the Standard
Model interactions seems extremely difficult at existing or future neutrino
telescopes. Thus any positive signal would be due to some non-standard
interactions of neutrinos.

High Energy Physics - Phenomenology;High Energy Astrophysical Phenomena