Current non-conservation effects in ultra-high energy neutrino interactions
R. Fiore, V. R. Zoller1) +
Dipartimento di Fisica, Università della Calabria
Istituto Nazionale di Fisica Nucleare, Gruppo collegato di Cosenza, I-87036 Rende, Cosenza, Italy
+ITEP, 117218 Moscow, Russia
The overall hardness scale of the
ultra-high energy neutrino-nucleon interactions is usually estimated as
The effect of non-conservation of weak currents pushes this scale up to
the top quark mass squared and changes dynamics of the scattering process.
The Double Leading Log
Approximation provides simple and numerically accurate formula for the
top-bottom contribution to the total cross section σν N.
Corresponding correction to
σν N appears to be numerically large. It is comparable
with the leading contribution evaluated in the
massless quark approximation.