Particles and Nuclei

Experimental evidenees for non vanishing neutrino masses are now very eon­ vincing. In the third English edition we have rewritten the paragraphs in which, in the previous edition the question of the neutrino mass has been left open. We have mueh appreciated the diseussions with Stephan Sehönert (Heidel­ berg) on the new results of the neutrino oseillations and their interpretations. We would like...