Neutrino-Nucleon Cross Section in Ultra High Energy Regime

Abstract

Studies on neutrino-nucleon (νN ) cross sections at different energy scales have regained interest due to increasing importance of precision measurements, as they are needed as an ingredient in all neutrino experiments. In this paper we have calculated both charged current (CC) and neutral current (NC) νN scattering cross sections at Ultra High Energy (UHE) regime in the neutrino energy (Eν) region i.e. 10 9 GeV ≤ Eν ≤ 10 12 GeV using QCD inspired double asymptotic limit fit of electron-proton structure function F ep 2 to low x HERA data. The form F ep 2 ∼ x −λ(Q 2 ) used in our analysis, can be conjectured like a dynamic pomeron (DP)-type behaviour. We also find an analytic form of the total cross sections, σ νN CC and σ νN NC which appear to be of hard-pomeron exchange types. A comparative analysis of our results with those available in literature is alsodone. An improved understanding of νN interactions at UHE are essentially important for future oscillation experiments. Future measurements will support/confront our predictions.