The Particle Data Group is an international collaboration of particle physicists that compiles and maintains the most up-to-date and comprehensive database of particle properties and experimental results.
The PDG database is publicly available online through their website. Users can also access the information through various software tools and databases, such as the Particle Data Book.
The PDG database includes information on the properties of all known particles, including their masses, charges, lifetimes, and decay modes. It also includes experimental results and theoretical predictions for various particle interactions and processes.
The PDG database is updated every two years, with smaller updates and corrections made throughout the year. The most recent version, known as the 2020 edition, was released in December 2020.
Yes, the PDG welcomes contributions from the scientific community. Scientists can submit their own experimental results or theoretical predictions to be included in the database, and can also provide feedback and corrections on existing information.