Absolute neutrino masses: physics beyond SM, double beta decay and   cosmic rays
  Absolute neutrino masses provide a key to physics beyond the standard model. We discuss the impact of absolute neutrinos masses on physics beyond the standard model, the experimental possibilities to determine absolute neutrinos masses, and the intriguing connection with the Z-burst model for extreme-energy cosmic rays. 
Heinrich P\"as (W\"urzburg), Thomas J. Weiler (Vanderbilt)