The Particle Data Group is an international collaboration charged with summarizing Particle Physics, as well as related areas of Cosmology and Astrophysics. In 2014, the PDG consists of 222 authors from 148 institutions in 24 countries.

The Review of Particle Physics includes a compilation and evaluation of measurements of the properties of the elementary particles including gauge bosons, Higgs bosons, leptons, quarks, mesons, and baryons. It summarizes searches for hypothetical particles such as heavy neutrinos, supersymmetric and technicolor particles, axions, dark photons, etc. All tables, listings, and reviews (and errata) are also available on the Particle Data Group website: http://pdg.lbl.gov.