What is pdg?

PDG stands for Particle Data Group, which is an international collaboration of particle physicists that compile and analyze experimental data on subatomic particles and their properties. The PDG publishes an annual reference book, called the Review of Particle Physics, which provides the most comprehensive summary of experimental results and theoretical interpretations of subatomic physics. The PDG also organizes workshops and conferences to discuss new findings and advances in the field of particle physics. The organization was established in 1947 and is based in the United States.