Estimating non-linear QCD effects in ultrahigh energy neutrino events at IceCube

Abstract

The number of ultrahigh energy events at IceCube is estimated, for the first time, taking into account non-linear QCD effects in the neutrino - hadron cross section. We assume that the extragalactic neutrino flux is given by ${\Phi }_{\nu }(E_{\nu })={\Phi }_0{E}_{\nu }^{-2}$ and estimate the neutrino - hadron cross section using the dipole approach and a phenomenological model for the dipole - hadron cross section based on non-linear QCD dynamics. We demonstrate that the non-linear prediction is able to describe the current IceCube data and that the magnitude of the non-linear effects is larger than 20 % for visible energies of order of 2 PeV and increases with the neutrino energy. Our main conclusion is that the non-linear QCD effects are non-negligible and should be taken into account in the analysis of the number of ultrahigh energy events.

arXiv comment5 pages, 3 figures. Version published in Physical Review D

References in corpus (24)

• Parton distributions for the LHC
• New parton distributions for collider physics
• Operator expansion for high-energy scattering
• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• Small-x F_2 Structure Function of a Nucleus Including Multiple Pomeron Exchanges
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction
• The Wilson renormalization group for low x physics: towards the high density regime
• Nonlinear Gluon Evolution in the Color Glass Condensate: II
• First observation of PeV-energy neutrinos with IceCube
• Unitarization of the BFKL Pomeron on a Nucleus
• The Intrinsic Glue Distribution at Very Small x
• The Wilson renormalization group for low x physics: Gluon evolution at finite parton density
• Unitarity at small Bjorken x
• Relating different approaches to nonlinear QCD evolution at finite gluon density
• Factorization and high-energy effective action
• Unitarization of Gluon Distribution in the Doubly Logarithmic Regime at High Density
• Factorization for high-energy scattering
• The triple-pomeron regime and the structure function of the pomeron in the diffractive deep inelastic scattering at very small x
• Standard Model Explanation of the Ultra-high Energy Neutrino Events at IceCube
• On possible implications of gluon number fluctuations in DIS data
• A comparative study of the neutrino-nucleon cross section at ultra high energies
• Heavy Quark Production in Ultra High Energy Cosmic Ray Interactions

Cited by in corpus (4)

• Extracting the Energy-Dependent Neutrino-Nucleon Cross Section Above 10 TeV Using IceCube Showers
• A Possible Two-component Flux for the High Energy Neutrino Events at IceCube
• The ultra-high-energy neutrino-nucleon cross section: measurement forecasts for an era of cosmic EeV-neutrino discovery
• Investigating the effects of the QCD dynamics in the neutrino absorption by the Earth's interior at ultrahigh energies