Sensitivity on earth core and mantle densities using atmospheric neutrinos
11 pages, 11 figures.-- ISI article identifier:000267776100008 .-- ArXiv pre-print avaible at: http://arxiv.org/abs/0904.0796 ; Neutrino radiography may provide an alternative tool to study the very deep structures of the Earth. Though these measurements are unable to resolve the fine density layer features, nevertheless the information which can be obtained are independent and complementary to the more conventional seismic studies. The aim of this paper is to assess how well the core and mantle averaged densities can be reconstructed through atmospheric neutrino radiography. We find that about a 2% sensitivity for the mantle and 5% for the core could be achieved for a ten year data taking at an underwater km(3) Neutrino Telescope. This result does not take into account systematics related to the details of the experimental apparatus. ; This work is supported by the Istituto Nazionale di Fisica Nucleare I.S. Fa51, the PRIN 2006 "Fisica Astroparticellare: Neutrini ed Universo Primordiale" of the Italian Minis- tero dell'Istruzione, Universit`a e Ricerca, the Spanish MICINN (grants SAB2006-0171 and FPA2008-00319), by a MICINN-INFN agreement, and by the European Union under the ILIAS project (Contract No. RII3-CT-2004-506222).