Murray Gell-Mann helped develop a growing body of data associated with newly discovered subatomic particles explored at Berkeley Lab and elsewhere. A paper Art Rosenfeld co-authored with Gell-Mann served as the genesis for the particle property reports produced by the Lab’s Particle Data Group. https://www.nytimes.com/2019/05/24/obituaries/murray-gell-mann-died-.html?searchResultPosition=4