How Light Is a Neutrino? The Answer Is Closer Than Ever
Physicists have taken a step towards nailing down the mass of the neutrino, perhaps the most mysterious of all elementary particles. The team at the Karlsruhe Tritium Neutrino (KATRIN) experiment in Germany reports that neutrinos have a maximum mass of 0.8 electron volts. Researchers have long had indirect evidence that the particles should be lighter … Read more