Earth Planets Space, Vol. 62 (No. 2), pp. 195-199, 2010
Thomas K. Gaisser
Bartol Research Institute & Department of Physics and Astronomy,University of Delaware, Newark DE 19716, USA
(Received December 19, 2008; Revised May 23, 2009; Accepted June 5, 2009; Online published February 22, 2010)
Using the atmospheric neutrinos to probe the density
profile of the Earth depends on knowing the angular distribution of the neutrinos
at production and the neutrino cross section. This paper reviews the essential
features of the angular distribution with emphasis on the relative contributions
of pions, kaons and charm.
Key words: Neutrinos, charm, cosmic rays.