Direct lepton production reported
DOI: 10.1063/1.3128911
One of the most exciting topics at the XVII International Conference on High Energy Physics in London in July was the reports from five groups that they had observed direct production of muons and electrons from proton–proton interactions. Except for the results from Serpukhov, which were at lower energy, the experiments all find that the ratio of muons (or electrons) produced to pions produced is a constant, approximately
