ATIC and PAMELA results on cosmic e± excesses and neutrino masses

Abstract

Recently the ATIC and PAMELA collaborations released their results which show the abundant e ± excess in cosmic rays well above the background, but not for the . Their data if interpreted as the dark matter particles' annihilation imply that the new physics with the dark matter is closely related to the lepton sector. In this paper we study the possible connection of the new physics responsible for the cosmic e ± excesses to the neutrino mass generation. We consider a class of models and do the detailed numerical calculations. We find that some models can account for the ATIC and PAMELA e ± and data and at the same time generate the small neutrino masses. © 2009 SISSA.