‘Massive, blimplike experiment lowers weight limit on neutrino’
17 September 2019
15:55
Physicists have set a new limit on the mass of nature’s lightest particle of matter. The neutrino can weigh no more than 1.1 electron volts (eV)—less than one-500,000th the mass of an electron—say experimenters with the Karlsruhe Tritium Neutrino (KATRIN) experiment at the Karlsruhe Institute of Technology in Germany. Reported on 13 September at a meeting in Toyama, Japan, the new result halves the previous limit of 2 eV.
