Investigating the effects of the QCD dynamics in the neutrino absorption by the Earth's interior at ultrahigh energies

Research output: Contribution to journalArticle


The opacity of the Earth to incident ultrahigh energy neutrinos is directly connected with the behavior of the neutrino-nucleon (sigma(nu N)) cross sections in a kinematic range utterly unexplored. In this work we investigate how the uncertainties in sigma(nu N) due the different QCD dynamic models modify the neutrino absorption while they travel across the Earth. In particular, we compare the predictions of two extreme scenarios for the high energy behavior of the cross section, which are consistent with the current experimental data. The first scenario considered is based on the solution of the linear Dokshitzer-Gribov-Lipatov-Altarelli-Parisi equations at small x and large Q(2), while the second one takes into account the unitarity effects in the neutrino-nucleon cross section by the imposition of the Froissart bound behavior in the nucleon structure functions at large energies. Our results indicate that the probability of absorption and the angular distribution of neutrino events are sensitive to the QCD dynamics at ultrahigh energies.


  • Victor Goncalves
  • D. R. Gratieri
External organisations
  • Federal University of Pelotas
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Article number113007
JournalPhysical Review D (Particles, Fields, Gravitation and Cosmology)
Issue number11
Publication statusPublished - 2015
Publication categoryResearch